/* ===== RESET & CSS VARIABLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

:root {
    --bg-primary: rgba(255, 255, 255, 0.98);
    --bg-secondary: rgba(248, 250, 252, 0.95);
    --bg-glass: rgba(255, 255, 255, 0.85);
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-tertiary: #718096;
    --border-color: rgba(226, 232, 240, 0.5);
    --accent-color: #6b5b95;
    --accent-light: #8b7bb8;
    --accent-dark: #4c3d6d;
    --success-color: #059669;
    --danger-color: #dc2626;
    --card-shadow: 0 8px 32px rgba(31, 38, 135, 0.15);
    --card-hover-shadow: 0 16px 48px rgba(31, 38, 135, 0.2);
    --input-bg: rgba(255, 255, 255, 0.5);
    --input-border: rgba(226, 232, 240, 0.3);
    --page-gradient: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 250, 252, 0.9) 100%);
}

body.dark-theme {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-glass: rgba(15, 23, 42, 0.92);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --border-color: #1e293b;
    --accent-color: rgba(125, 211, 252, 0.88);
    --accent-light: rgba(186, 230, 253, 0.92);
    --accent-dark: rgba(56, 189, 248, 0.88);
    --success-color: #34d399;
    --danger-color: #f87171;
    --card-shadow: 0 4px 20px rgba(0,0,0,0.4);
    --card-hover-shadow: 0 8px 40px rgba(0,0,0,0.5);
    --input-bg: #1e293b;
    --input-border: #334155;
    --page-gradient: linear-gradient(145deg, #020617 0%, #0f172a 50%, #020617 100%);
}

/* ===========================
   HAMBURGER BUTTON
   =========================== */
.hamburger-btn {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1.5px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    padding: 8px;
    transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    z-index: 1100;
    position: relative;
}

.hamburger-btn:hover {
    background: rgba(var(--accent-color-rgb, 99,102,241), 0.08);
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
}

.hamburger-btn:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.ham-bar {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform 0.3s cubic-bezier(0.22,1,0.36,1),
                opacity   0.2s ease,
                width     0.3s cubic-bezier(0.22,1,0.36,1);
    transform-origin: center;
}

/* Animate bars → X when open */
.hamburger-btn.open .ham-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger-btn.open .ham-bar:nth-child(2) { opacity: 0; width: 0; }
.hamburger-btn.open .ham-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===========================
   THEME TOGGLE BUTTON
   =========================== */
.theme-toggle-btn {
    position: static;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1.5px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    color: var(--text-primary);
    box-shadow: var(--card-shadow);
    transition: background 0.25s ease, border-color 0.25s ease,
                box-shadow 0.25s ease, transform 0.2s cubic-bezier(0.22,1,0.36,1);
    overflow: hidden;
}

.theme-toggle-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-color);
    box-shadow: var(--card-hover-shadow);
    transform: scale(1.08);
}

.theme-toggle-btn:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.theme-toggle-btn:active {
    transform: scale(0.95);
}

.toggle-icon {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.25s ease, transform 0.3s cubic-bezier(0.22,1,0.36,1);
}

/* Light mode: show moon (click to go dark) */
.toggle-icon-moon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.toggle-icon-sun {
    opacity: 0;
    transform: rotate(90deg) scale(0.4);
}

/* Dark mode: show sun (click to go light) */
body.dark-theme .toggle-icon-moon {
    opacity: 0;
    transform: rotate(-90deg) scale(0.4);
}

body.dark-theme .toggle-icon-sun {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

/* ===========================
   NAV OVERLAY
   =========================== */
.nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 1200;
}

.nav-overlay.open {
    opacity: 1;
    visibility: visible;
}

/* ===========================
   SIDE NAV DRAWER
   =========================== */
.nav-drawer {
    position: fixed;
    top: 0;
    left: 0;
    width: 300px;
    max-width: 85vw;
    height: 100dvh;
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    box-shadow: 4px 0 40px rgba(0,0,0,0.18);
    transform: translateX(-100%);
    transition: transform 0.35s cubic-bezier(0.22,1,0.36,1);
    z-index: 1300;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.nav-drawer.open {
    transform: translateX(0);
}

/* Accent stripe */
.nav-drawer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-light), var(--success-color));
}

/* --- Drawer header --- */
.nav-drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.nav-drawer-logo {
    font-family: 'Montserrat', sans-serif;
    font-weight: 800;
    font-size: 1rem;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 0.02em;
}

.nav-close-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: transparent;
    border: 1.5px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.nav-close-btn:hover {
    background: rgba(239,68,68,0.08);
    color: var(--danger-color);
    border-color: rgba(239,68,68,0.3);
}

/* --- Menu list --- */
.nav-menu {
    list-style: none;
    padding: 12px 12px 0;
    margin: 0;
    flex: 1;
    overflow-y: auto;
}

.nav-divider {
    height: 1px;
    background: var(--border-color);
    margin: 10px 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 11px 14px;
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background 0.18s ease, color 0.18s ease, transform 0.15s ease;
}

.nav-link:hover {
    background: rgba(99,102,241,0.07);
    color: var(--accent-color);
    transform: translateX(3px);
}

.nav-link.active {
    background: rgba(99,102,241,0.1);
    color: var(--accent-color);
    font-weight: 600;
}

.nav-link.active svg { opacity: 1; }

.nav-link svg {
    flex-shrink: 0;
    opacity: 0.7;
}

/* --- Group / submenu --- */
.nav-group-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 11px 14px;
    background: transparent;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    transition: background 0.18s ease, color 0.18s ease;
    text-align: left;
}

.nav-group-toggle:hover {
    background: rgba(99,102,241,0.07);
    color: var(--accent-color);
}

.nav-group-toggle-left {
    display: flex;
    align-items: center;
    gap: 11px;
}

.nav-group-toggle-left svg {
    flex-shrink: 0;
    opacity: 0.7;
}

.nav-chevron {
    flex-shrink: 0;
    transition: transform 0.3s cubic-bezier(0.22,1,0.36,1);
    opacity: 0.55;
}

.nav-group.expanded .nav-chevron {
    transform: rotate(180deg);
}

.nav-submenu {
    list-style: none;
    margin: 4px 0 4px 28px;
    padding: 0;
    display: none;
}

.nav-group.expanded .nav-submenu {
    display: block;
    animation: submenuReveal 0.25s cubic-bezier(0.22,1,0.36,1);
}

@keyframes submenuReveal {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}

.nav-sublink {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 9px 14px;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-tertiary);
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    transition: background 0.18s ease, color 0.18s ease;
    border-left: 2px solid var(--border-color);
}

.nav-sublink:hover,
.nav-sublink.active {
    background: rgba(99,102,241,0.07);
    color: var(--accent-color);
    border-left-color: var(--accent-color);
}

/* --- Drawer theme section --- */
.nav-theme-section {
    padding: 14px 16px;
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

.nav-section-label {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: var(--text-tertiary);
    margin-bottom: 10px;
}

.nav-theme-pills {
    display: flex;
    gap: 6px;
}

.nav-theme-pill {
    flex: 1;
    padding: 7px 4px;
    background: transparent;
    border: 1.5px solid var(--border-color);
    border-radius: 9px;
    cursor: pointer;
    font-size: 0.72rem;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.18s cubic-bezier(0.22,1,0.36,1);
    text-align: center;
    white-space: nowrap;
}

.nav-theme-pill:hover {
    background: rgba(99,102,241,0.07);
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: translateY(-1px);
}

.nav-theme-pill.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
    box-shadow: 0 2px 10px rgba(99,102,241,0.3);
}

/* --- Drawer footer --- */
.nav-drawer-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-tertiary);
    font-size: 0.75rem;
    flex-shrink: 0;
}

/* Prevent body scroll when drawer open */
body.nav-open { overflow: hidden; }

/* ===========================
   PAGE LAYOUT (home / about / contact)
   =========================== */
.page-container {
    max-width: 860px;
    margin: 0 auto;
    padding: 28px 20px 72px;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

/* Page header shared card */
.page-hero {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    box-shadow: var(--card-shadow);
    padding: 52px 36px 44px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-light), var(--success-color));
    border-radius: 20px 20px 0 0;
}

.page-hero-eyebrow {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    color: #fff;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 4px 14px;
    border-radius: 99px;
    margin-bottom: 18px;
}

.page-hero h2 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
    font-size: clamp(1.6rem, 4vw, 2.4rem);
    background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 14px;
    line-height: 1.15;
}

.page-hero p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.65;
    max-width: 560px;
    margin: 0 auto 28px;
}

.hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 26px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
    color: #fff;
    border: none;
    border-radius: 12px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 0.88rem;
    letter-spacing: 0.04em;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.22s cubic-bezier(0.22,1,0.36,1);
    box-shadow: 0 4px 14px rgba(0,0,0,0.15);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 26px;
    background: transparent;
    color: var(--accent-color);
    border: 1.5px solid var(--accent-color);
    border-radius: 12px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 0.88rem;
    letter-spacing: 0.04em;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.22s cubic-bezier(0.22,1,0.36,1);
}

.btn-secondary:hover {
    background: rgba(99,102,241,0.07);
    transform: translateY(-2px);
}

/* Content section card */
.page-section {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    box-shadow: var(--card-shadow);
    padding: 32px 28px;
    transition: box-shadow 0.2s ease;
}

.page-section:hover {
    box-shadow: var(--card-hover-shadow);
}

.page-section h3 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 800;
    font-size: 1.15rem;
    color: var(--text-primary);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.page-section h3 svg { color: var(--accent-color); flex-shrink: 0; }

.page-section p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.93rem;
    margin-bottom: 12px;
}

.page-section p:last-child { margin-bottom: 0; }

/* 2-col grid for feature / about cards */
.page-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.page-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    padding: 24px 22px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.page-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--card-hover-shadow);
}

.page-card-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    margin-bottom: 4px;
    flex-shrink: 0;
}

.page-card h4 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.page-card p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
}

.page-card a {
    margin-top: auto;
    color: var(--accent-color);
    font-size: 0.84rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: gap 0.18s ease;
}

.page-card a:hover { gap: 9px; }

/* Badge "Coming Soon" */
.badge-soon {
    display: inline-block;
    background: rgba(99,102,241,0.1);
    color: var(--accent-color);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    padding: 2px 9px;
    border-radius: 99px;
    border: 1px solid rgba(99,102,241,0.2);
}

/* ── Contact form ── */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    align-items: flex-start;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.03em;
}

.form-input,
.form-textarea {
    background: var(--input-bg);
    border: 1.5px solid var(--input-border);
    border-radius: 10px;
    padding: 11px 14px;
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    outline: none;
    width: 100%;
    box-sizing: border-box;
}

.form-textarea {
    resize: vertical;
    min-height: 130px;
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-tertiary);
}

/* ── About stat row ── */
.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    text-align: center;
}

.about-stat-value {
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
    font-size: 1.7rem;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}

.about-stat-label {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Page header (shared across pages — different from .header on SIP page) */
.page-header {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    box-shadow: var(--card-shadow);
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    position: relative;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-light), var(--success-color));
    border-radius: 20px 20px 0 0;
}

.page-header-brand {
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
    font-size: clamp(0.95rem, 2vw, 1.2rem);
    background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    flex: 1;
}

@media (max-width: 600px) {
    .form-row { grid-template-columns: 1fr; }
    .about-stats { grid-template-columns: repeat(3, 1fr); }
    .page-hero { padding: 36px 20px 32px; }
    .page-section { padding: 24px 18px; }
}

/* ===========================
   DARK THEME — Nav overrides
   =========================== */
body.dark-theme .nav-drawer {
    background: #111113;
    box-shadow: 4px 0 40px rgba(0,0,0,0.55);
}

body.dark-theme .hamburger-btn:hover {
    box-shadow: 0 0 0 3px rgba(129,140,248,0.18);
    border-color: var(--accent-color);
}

/* ===== BASE ===== */
html, body {
    height: 100%;
    min-height: 100vh;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--page-gradient);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background 0.4s ease, color 0.3s ease;
}

/* ===== BACKGROUND SHARDS ===== */
.bg-shard {
    position: fixed;
    border-radius: 50%;
    filter: blur(100px);
    z-index: 0;
    opacity: 0.18;
    pointer-events: none;
    animation: floatShard 20s infinite alternate ease-in-out;
}

.shard-1 {
    width: 550px; height: 550px;
    background: var(--accent-color);
    top: -180px; right: -120px;
}
.shard-2 {
    width: 450px; height: 450px;
    background: var(--accent-light);
    bottom: -120px; left: -120px;
    animation-delay: -7s;
}
.shard-3 {
    width: 300px; height: 300px;
    background: var(--success-color);
    top: 35%; left: 50%;
    animation-delay: -12s;
    animation-duration: 24s;
}

@keyframes floatShard {
    0%   { transform: translate(0, 0) scale(1) rotate(0deg); }
    100% { transform: translate(60px, 80px) scale(1.15) rotate(5deg); }
}

/* ===== MAIN CONTAINER (on top of shards) ===== */
.container {
    position: relative;
    z-index: 1;
    max-width: 860px;
    margin: 0 auto;
    padding: 32px 20px 48px;
    display: flex;
    flex-direction: column;
    gap: 22px;
}

/* ===== HEADER ===== */
.header {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 16px 32px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: var(--card-shadow);
    position: relative;
    z-index: 10;
}

.header-top {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0;
}

.header-top .hamburger-btn {
    position: static;
    flex-shrink: 0;
}

.header-top h1 {
    flex: 1;
    text-align: center;
}

.header-title-short {
    display: none;
}

h1 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
    font-size: clamp(0.95rem, 2vw, 1.3rem);
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
    margin-bottom: 2px;
}

.tagline {
    color: var(--text-secondary);
    font-size: 0.78rem;
    line-height: 1.4;
    max-width: 600px;
    opacity: 0.85;
    text-align: center;
    margin: 6px auto 0;
}

/* ===== THEME SWITCHER ===== */
.theme-switcher {
    flex-shrink: 0;
    position: relative;
    z-index: 100;
}

.theme-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--bg-secondary);
    border: 1.5px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s, background 0.25s;
    outline: none;
    padding: 0;
}

.theme-btn:hover {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
    transform: translateY(-1px);
    background: var(--bg-primary);
}

.theme-switcher-icon {
    font-size: 1.25rem;
    display: block;
    line-height: 1;
    pointer-events: none;
}

/* ===== THEME DROPDOWN ===== */
.theme-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1.5px solid var(--border-color);
    border-radius: 16px;
    padding: 6px;
    list-style: none;
    min-width: 156px;
    box-shadow: var(--card-hover-shadow);
    z-index: 1000;
    opacity: 0;
    transform: translateY(-10px) scale(0.96);
    pointer-events: none;
    transition: opacity 0.2s cubic-bezier(0.22,1,0.36,1),
                transform 0.2s cubic-bezier(0.22,1,0.36,1);
    transform-origin: top right;
}

.theme-dropdown.open {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.theme-option {
    padding: 9px 13px;
    border-radius: 10px;
    cursor: pointer;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: background 0.15s, color 0.15s, transform 0.15s;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    user-select: none;
}

.theme-option:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    transform: translateX(3px);
}

.theme-option.active {
    color: var(--accent-color);
    background: rgba(99, 102, 241, 0.08);
    font-weight: 700;
}

.theme-option.active::after {
    content: '✓';
    margin-left: auto;
    font-size: 0.75rem;
    color: var(--accent-color);
}

/* ===== CONTENT GRID ===== */
.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    align-items: stretch;
    width: 100%;
}

/* Make input card a flex column so it fills the full grid row height */
.input-card {
    display: flex;
    flex-direction: column;
    flex: 1;
    /* Ensure equal width in grid */
    min-width: 0;
}

.input-card #sipForm {
    flex: 1;
}

/* Results card flex equal to input card */
.results-card {
    flex: 1;
    min-width: 0;
}

/* ===== CARDS ===== */
.input-card,
.results-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 28px;
    box-shadow: var(--card-shadow);
    transition: box-shadow 0.35s ease, transform 0.35s ease, border-color 0.35s ease;
    width: 100%;
    /* Do NOT use overflow:hidden here — it breaks the table horizontal scroll */
}

.input-card:hover,
.results-card:hover {
    box-shadow: var(--card-hover-shadow);
    transform: translateY(-2px);
    border-color: var(--accent-color);
}

.input-card h2,
.results-card h2 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 800;
    font-size: 1.15rem;
    color: var(--text-primary);
    margin-bottom: 24px;
    padding-bottom: 14px;
    border-bottom: 2px solid var(--border-color);
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
    gap: 10px;
}

.input-card h2 svg {
    color: var(--accent-color);
    flex-shrink: 0;
    opacity: 0.85;
}

.input-card h2::before {
    content: '';
    width: 4px;
    height: 22px;
    border-radius: 4px;
    background: linear-gradient(180deg, var(--accent-color), var(--accent-light));
    flex-shrink: 0;
}

.results-card h2::before {
    content: '';
    width: 4px;
    height: 22px;
    border-radius: 4px;
    background: linear-gradient(180deg, var(--success-color), var(--accent-light));
    flex-shrink: 0;
}

/* ===== FORM ===== */
#sipForm {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    align-items: flex-start;
}

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 20px;
}

.form-divider {
    height: 1px;
    background: var(--border-color);
    margin: 8px 0 24px;
}

/* ===== INPUT WRAPPER (prefix/suffix) ===== */
.input-wrapper {
    position: relative;
    display: flex;
    align-items: stretch;
}

.input-wrapper input[type="number"] {
    flex: 1;
    min-width: 0;
    margin-bottom: 0;
    border-radius: 12px;
    position: relative;
    z-index: 1;
}

.input-wrapper:has(.input-prefix) input[type="number"] {
    padding-left: 42px;
}

.input-wrapper:has(.input-suffix) input[type="number"] {
    padding-right: 48px;
    border-radius: 12px;
}

.input-prefix,
.input-suffix {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-family: 'Montserrat', sans-serif;
    font-size: 0.78rem;
    font-weight: 800;
    pointer-events: none;
    z-index: 2;
    transition: color 0.2s;
    user-select: none;
}

.input-prefix {
    left: 14px;
    color: var(--accent-color);
    opacity: 0.75;
}

.input-suffix {
    right: 14px;
    color: var(--text-tertiary);
    letter-spacing: 0.04em;
}

/* When input is focused, brighten suffix/prefix */
.input-wrapper:focus-within .input-prefix {
    opacity: 1;
    color: var(--accent-color);
}
.input-wrapper:focus-within .input-suffix {
    color: var(--accent-color);
}

/* ===== STEP-UP SECTION ===== */
.stepup-section {
    background: var(--bg-secondary);
    border: 1.5px solid var(--border-color);
    border-radius: 16px;
    padding: 16px 16px 4px;
    margin: 6px 0 18px;
}

.stepup-section-header {
    display: flex;
    align-items: center;
    gap: 7px;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: var(--accent-color);
    margin-bottom: 16px;
    opacity: 0.9;
}

label {
    font-weight: 700;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-secondary);
    margin-bottom: 7px;
}

input[type="number"],
select {
    width: 100%;
    background: var(--bg-primary);
    border: 1.5px solid var(--input-border);
    border-radius: 12px;
    padding: 11px 14px;
    color: var(--text-primary);
    font-family: 'Montserrat', sans-serif;
    font-size: 0.98rem;
    font-weight: 700;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
    margin-bottom: 8px;
}

input[type="number"]:hover,
select:hover {
    border-color: var(--accent-light);
}

input[type="number"]:focus,
select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    background: var(--bg-primary);
}

input[type="number"]:focus-visible,
select:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.hidden-native-select {
    display: none;
}

/* ===== CUSTOM SELECT ===== */
.custom-select {
    position: relative;
    z-index: 1;
}

/* Elevate above sibling form-groups when open */
.custom-select:has(.custom-select-dropdown.open) {
    z-index: 20;
}

.custom-select-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    background: var(--input-bg);
    border: 1.5px solid var(--input-border);
    border-radius: 12px;
    padding: 11px 14px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
    text-align: left;
    outline: none;
    white-space: nowrap;
    overflow: hidden;
}

.custom-select-label {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

.custom-select-btn:hover {
    border-color: var(--accent-light);
}

.custom-select-btn[aria-expanded="true"] {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    background: var(--bg-primary);
}

.custom-select-arrow {
    flex-shrink: 0;
    color: var(--accent-color);
    transition: transform 0.2s cubic-bezier(0.22, 1, 0.36, 1);
}

.custom-select-btn[aria-expanded="true"] .custom-select-arrow {
    transform: rotate(180deg);
}

.custom-select-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1.5px solid var(--border-color);
    border-radius: 14px;
    padding: 5px;
    list-style: none;
    box-shadow: var(--card-hover-shadow);
    z-index: 200;
    opacity: 0;
    transform: translateY(-8px) scale(0.97);
    pointer-events: none;
    transition: opacity 0.18s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.18s cubic-bezier(0.22, 1, 0.36, 1);
    transform-origin: top center;
}

.custom-select-dropdown.open {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.custom-select-option {
    padding: 9px 12px;
    border-radius: 9px;
    cursor: pointer;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: background 0.15s, color 0.15s;
    display: flex;
    align-items: center;
    justify-content: space-between;
    user-select: none;
}

.custom-select-option:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.custom-select-option.active {
    color: var(--accent-color);
    background: rgba(99, 102, 241, 0.07);
    font-weight: 700;
}

.custom-select-option.active::after {
    content: '✓';
    font-size: 0.75rem;
    color: var(--accent-color);
}

.step-up-hint {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    font-style: italic;
    margin-top: 6px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.step-up-hint::before {
    content: '↗';
    font-style: normal;
    font-size: 0.75rem;
    color: var(--success-color);
    opacity: 0.7;
}

.field-error {
    display: block;
    font-size: 0.7rem;
    font-weight: 600;
    color: #ef4444;
    margin-top: 5px;
    min-height: 1em;
    letter-spacing: 0.01em;
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.field-error.visible {
    opacity: 1;
    transform: translateY(0);
}

input.input-invalid {
    border-color: #ef4444 !important;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

/* ===== RESET BUTTON ===== */
.submit-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 100%);
    color: #fff;
    border: none;
    border-radius: 14px;
    padding: 15px 24px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 0.88rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    cursor: pointer;
    margin-top: 10px;
    transition: all 0.22s cubic-bezier(0.22,1,0.36,1);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.submit-btn:hover {
    background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent-color) 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(0,0,0,0.2);
}

.submit-btn:active {
    transform: translateY(1px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.submit-btn:focus-visible {
    outline: 3px solid var(--accent-light);
    outline-offset: 3px;
}

/* Dark theme — translucent sky-cyan so the button feels glassy against dark */
body.dark-theme .submit-btn {
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.75) 0%, rgba(14, 165, 233, 0.7) 100%);
    box-shadow: 0 4px 20px rgba(56, 189, 248, 0.25);
    color: #fff;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(125, 211, 252, 0.3);
}

body.dark-theme .submit-btn:hover {
    background: linear-gradient(135deg, rgba(125, 211, 252, 0.8) 0%, rgba(56, 189, 248, 0.75) 100%);
    box-shadow: 0 8px 32px rgba(56, 189, 248, 0.38);
}

body.dark-theme .submit-btn:focus-visible {
    outline-color: rgba(186, 230, 253, 0.9);
}

/* ===== FORMAT TOGGLE ===== */
.format-toggle-row {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 16px;
}

/* SWP corpus exhaustion warning */
.swp-notice {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 10px;
    background: rgba(239, 68, 68, 0.1);
    border: 1.5px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 14px;
}

.format-toggle {
    display: inline-flex;
    background: var(--bg-secondary);
    border: 1.5px solid var(--border-color);
    border-radius: 12px;
    padding: 4px;
    gap: 3px;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.06);
}

.format-btn {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 6px 13px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    background: transparent;
    color: var(--text-secondary);
    transition: background 0.22s cubic-bezier(0.22,1,0.36,1), color 0.22s, box-shadow 0.22s, transform 0.15s;
    letter-spacing: 0.04em;
    outline: none;
    white-space: nowrap;
    text-transform: uppercase;
}

.format-btn.active {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
    color: #fff;
    box-shadow: 0 2px 10px rgba(99, 102, 241, 0.3);
    transform: translateY(-0.5px);
}

.format-btn:not(.active):hover {
    background: var(--bg-glass);
    color: var(--text-primary);
    transform: translateY(-0.5px);
}

.format-btn:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* ===== RESULTS SECTION ===== */
.results-section {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.result-card {
    background: var(--bg-secondary);
    border: 1.5px solid var(--border-color);
    border-radius: 16px;
    padding: 18px 12px 14px;
    text-align: center;
    transition: border-color 0.25s, transform 0.25s cubic-bezier(0.22,1,0.36,1), box-shadow 0.25s;
    position: relative;
    overflow: hidden;
    min-width: 0;
}

/* Always-visible top accent bar per card */
.result-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    border-radius: 16px 16px 0 0;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-light));
}

.result-card:nth-child(2)::before {
    background: linear-gradient(90deg, var(--success-color), #34d399);
}

.result-card:nth-child(3)::before {
    background: linear-gradient(90deg, var(--accent-color), #c084fc);
}

.result-card:hover {
    border-color: var(--accent-light);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.14);
}

.result-card:nth-child(2):hover {
    border-color: var(--success-color);
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.14);
}

.result-card:nth-child(3):hover {
    border-color: var(--accent-light);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.18);
}

.result-label {
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: var(--text-tertiary);
    margin-bottom: 8px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.result-value {
    font-family: 'Montserrat', sans-serif;
    font-weight: 800;
    font-size: clamp(0.85rem, 1.4vw, 1.25rem);
    color: var(--text-primary);
    word-break: break-all;
    overflow-wrap: anywhere;
    line-height: 1.25;
    transition: color 0.2s;
}

@keyframes valueUpdate {
    0%   { transform: translateY(-4px); opacity: 0.4; }
    100% { transform: translateY(0);    opacity: 1; }
}

.result-value.updated {
    animation: valueUpdate 0.25s cubic-bezier(0.22,1,0.36,1);
}

.result-value.gains { color: var(--success-color); }
.result-value.final { color: var(--accent-color); font-size: clamp(0.95rem, 1.6vw, 1.4rem); font-weight: 900; }

/* ===== CHART ===== */
.chart-container {
    height: 280px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px;
    margin-bottom: 20px;
    position: relative;
    transition: box-shadow 0.25s, border-color 0.25s;
}

.chart-container:hover {
    border-color: var(--accent-light);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.08);
}

/* ===== BREAKDOWN TABLE (Full-Width Card) ===== */
.breakdown-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 28px 28px 0;
    box-shadow: var(--card-shadow);
    overflow: hidden;
    transition: border-color 0.35s ease;
}

.breakdown-card:hover {
    border-color: var(--accent-color);
}

.breakdown-card h3 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.breakdown-card h3::before {
    content: '';
    width: 4px;
    height: 20px;
    border-radius: 4px;
    background: linear-gradient(180deg, var(--accent-color), var(--accent-dark));
    flex-shrink: 0;
}

.row-count {
    margin-left: auto;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--text-tertiary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 99px;
    padding: 2px 10px;
    letter-spacing: 0.04em;
}

.table-wrapper {
    overflow-x: auto;
    border-top: 1px solid var(--border-color);
    scrollbar-width: none;
    scrollbar-color: var(--border-color) transparent;
}

.table-wrapper::-webkit-scrollbar {
    display: none;
}

.breakdown-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.79rem;
    background: var(--bg-primary);
    table-layout: fixed;
}

.breakdown-table thead {
    background: var(--bg-secondary);
}

.breakdown-table th {
    padding: 10px 8px;
    text-align: right;
    font-weight: 700;
    font-size: 0.62rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border-color);
    white-space: normal;
    word-break: break-word;
    vertical-align: bottom;
    line-height: 1.3;
}

.breakdown-table th:first-child { text-align: center; width: 7%; }
.breakdown-table th:nth-child(2) { width: 16%; }
.breakdown-table th:nth-child(3) { width: 14%; }
.breakdown-table th:nth-child(4) { width: 14%; }
.breakdown-table th:nth-child(5) { width: 14%; }
.breakdown-table th:nth-child(6) { width: 12%; }
.breakdown-table th:nth-child(7) { width: 16%; }

.breakdown-table td {
    padding: 9px 8px;
    text-align: right;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 0.72rem;
    white-space: normal;
    word-break: break-all;
    overflow-wrap: anywhere;
    vertical-align: top;
    line-height: 1.5;
}

.breakdown-table td:first-child {
    text-align: center;
    font-weight: 700;
    font-family: inherit;
}

.breakdown-table tbody tr {
    transition: background 0.15s;
}

.breakdown-table tbody tr:hover {
    background: rgba(99, 102, 241, 0.05);
}

.breakdown-table tbody tr:last-child td {
    border-bottom: none;
}

/* ===== INFO BOX ===== */
.info-box {
    background: var(--bg-glass);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 36px 40px;
    box-shadow: var(--card-shadow);
}

.info-box h2 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 800;
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 28px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--border-color);
}

.info-section {
    margin-bottom: 32px;
}

.info-section:last-child { margin-bottom: 0; }

.info-box h3 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.info-box h3::before {
    content: '';
    display: inline-block;
    width: 3px;
    height: 18px;
    border-radius: 3px;
    background: linear-gradient(180deg, var(--accent-color), var(--accent-light));
    flex-shrink: 0;
}

.info-box p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 10px;
}

.info-box ul,
.info-box ol {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    padding-left: 24px;
}

.info-box li {
    margin-bottom: 8px;
}

.info-box li strong {
    color: var(--text-primary);
}

.formula {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--accent-color);
    border-radius: 14px;
    padding: 20px 24px;
    margin-top: 12px;
    overflow-x: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.formula p {
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--text-primary);
    margin: 0;
}

/* ===== ANIMATIONS ===== */
@keyframes slideInUp {
    from { opacity: 0; transform: translateY(28px); }
    to   { opacity: 1; transform: translateY(0); }
}

.header          { animation: slideInUp 0.5s  cubic-bezier(0.22, 1, 0.36, 1) 0s    both; }
.input-card      { animation: slideInUp 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.07s both; }
.results-card    { animation: slideInUp 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.12s both; }
.breakdown-card  { animation: slideInUp 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.17s both; }
.info-box        { animation: slideInUp 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.22s both; }
.footer          { animation: slideInUp 0.5s  cubic-bezier(0.22, 1, 0.36, 1) 0.25s both; }

/* ===== UTILITY ===== */
.visually-hidden {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

/* reusable components */
.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    border-radius: 0.75rem;
    font-weight: 700;
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
}
.btn-primary {
    background: var(--accent-color);
    color: #fff;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}
.btn-secondary {
    background: var(--accent-light);
    color: #fff;
}

.card {
    background: var(--bg-glass);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 32px;
    box-shadow: var(--card-shadow);
    transition: box-shadow 0.35s ease, transform 0.35s ease;
}
.card:hover {
    box-shadow: var(--card-hover-shadow);
    transform: translateY(-3px);
}

/* hero section */
.hero {
    position: relative;
    height: 90vh;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    background: linear-gradient(135deg, var(--accent-dark) 0%, var(--accent-color) 100%);
    background-size: cover;
    background-position: center;
}
.hero-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.4);
}
.hero-content {
    position: relative;
    max-width: 800px;
    padding: 0 20px;
    z-index: 1;
    opacity: 0;
    animation: fadeInUp 1s ease forwards;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}
.hero h1 {
    font-size: clamp(2rem, 6vw, 4rem);
    line-height: 1.1;
    margin-bottom: 16px;
}
.hero p {
    font-size: 1.1rem;
    margin-bottom: 24px;
}

/* footer */
.footer {
    background: var(--bg-secondary);
    padding: 24px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-light), var(--success-color));
}

.footer-content {
    max-width: 1380px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    padding: 0 32px;
}

.footer-content p {
    font-size: 0.82rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

.social-icons {
    display: flex;
    align-items: center;
    gap: 4px;
}

.social-icons a {
    color: var(--text-tertiary);
    margin: 0;
    padding: 8px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s, background 0.2s, transform 0.2s;
}

.social-icons a:hover {
    color: var(--accent-color);
    background: var(--bg-glass);
    transform: translateY(-2px);
}

/* smooth scroll behavior */
html {
    scroll-behavior: smooth;
}


/* ===== RESPONSIVE ===== */

/* ── Tablet Landscape (≤ 1100px): stack input + results vertically ── */
@media (max-width: 1100px) {
    .content-wrapper {
        grid-template-columns: 1fr;
        align-items: stretch;
    }

    /* Ensure both cards remain full width and equal */
    .input-card,
    .results-card {
        width: 100%;
        min-width: 0;
    }

    /* On tablet, the input card no longer needs to stretch to match chart height */
    .input-card {
        height: auto;
    }

    /* Show results in 3 columns still — plenty of room */
    .results-section {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

/* ── Tablet Portrait (≤ 900px): tighten layout ── */
@media (max-width: 900px) {
    .container {
        padding: 24px 24px 40px;
        gap: 22px;
    }

    .header {
        padding: 22px 28px;
        gap: 16px;
    }

    .input-card,
    .results-card {
        padding: 28px 24px;
    }

    .breakdown-card {
        padding: 24px 24px 0;
        border-radius: 20px;
    }

    .info-box {
        padding: 28px 28px;
        border-radius: 20px;
    }
}

/* ── Mobile Large (≤ 768px): phone-first layout ── */
@media (max-width: 768px) {
    .container {
        padding: 14px 14px 36px;
        gap: 16px;
    }

    /* Header: compact, stack if needed */
    .header {
        padding: 14px 16px;
        flex-wrap: wrap;
        gap: 10px;
        border-radius: 18px;
    }

    .header-content {
        flex: 1 1 100%;
        min-width: 0;
    }

    .header-title-long { display: none; }
    .header-title-short { display: inline; }
    .tagline { display: none; }
    
    h1 { 
        font-size: clamp(1rem, 3vw, 1.3rem);
        margin-bottom: 0;
    }

    .theme-btn {
        width: 40px;
        height: 40px;
    }

    .theme-switcher-icon {
        font-size: 1.2rem;
    }

    /* Cards - ensure equal width */
    .input-card,
    .results-card {
        padding: 20px 18px;
        border-radius: 18px;
        transition: box-shadow 0.3s ease, border-color 0.3s ease;
        width: 100%;
        min-width: 0;
    }
    .input-card:hover,
    .results-card:hover {
        transform: none;
    }

    .input-card h2,
    .results-card h2 {
        font-size: 1.1rem;
        margin-bottom: 20px;
        padding-bottom: 12px;
    }

    /* Form: two-column on mobile, top-aligned so both columns stay level */
    .form-row {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
        align-items: start;
    }

    .form-group {
        margin-bottom: 18px;
    }

    label {
        font-size: 0.68rem;
        margin-bottom: 6px;
    }

    /* Fixed label height inside two-column rows so inputs always align */
    .form-row .form-group label {
        display: flex;
        align-items: flex-end;
        min-height: 2.0em;
        margin-bottom: 6px;
        line-height: 1.3;
    }

    input[type="number"],
    select {
        padding: 10px 13px;
        font-size: 0.92rem;
        border-radius: 10px;
        margin-bottom: 8px;
    }

    .form-divider {
        margin: 4px 0 18px;
    }

    .stepup-section {
        padding: 14px 14px 4px;
        margin: 4px 0 16px;
    }

    .submit-btn {
        padding: 13px 20px;
        font-size: 0.84rem;
    }

    /* Result summary cards: 3-column on mobile (compact) */
    .format-toggle-row {
        margin-bottom: 12px;
    }

    .results-section {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 10px;
        margin-bottom: 18px;
    }

    .result-card {
        padding: 14px 8px;
        border-radius: 14px;
    }

    .result-label {
        font-size: 0.58rem;
        letter-spacing: 0.05em;
    }

    .result-value {
        font-size: clamp(0.78rem, 3.5vw, 1rem);
    }

    .result-value.final {
        font-size: clamp(0.85rem, 4vw, 1.1rem);
    }

    /* Chart */
    .chart-container {
        height: 240px;
        padding: 12px;
        margin-bottom: 20px;
        border-radius: 14px;
    }

    /* Breakdown table card */
    .breakdown-card {
        padding: 20px 18px 0;
        border-radius: 18px;
    }

    .breakdown-card h3 {
        font-size: 1.05rem;
        margin-bottom: 16px;
    }

    /* Responsive table — no horizontal scroll */
    .breakdown-table {
        table-layout: fixed;
    }

    .breakdown-table th {
        padding: 8px 4px;
        font-size: 0.55rem;
        white-space: normal;
        word-break: break-word;
        letter-spacing: 0;
    }

    /* Narrow viewports: hide less important columns */
    .breakdown-table th:nth-child(4),
    .breakdown-table td:nth-child(4) {
        display: none;
    }

    .breakdown-table th:first-child { width: 8%; }
    .breakdown-table th:nth-child(2) { width: 19%; }
    .breakdown-table th:nth-child(3) { width: 16%; }
    .breakdown-table th:nth-child(5) { width: 16%; }
    .breakdown-table th:nth-child(6) { width: 14%; }
    .breakdown-table th:nth-child(7) { width: 19%; }

    .breakdown-table td {
        padding: 8px 4px;
        font-size: 0.63rem;
        white-space: normal;
        word-break: break-all;
        overflow-wrap: anywhere;
        vertical-align: top;
        line-height: 1.5;
    }
    }

    /* Info box */
    .info-box {
        padding: 20px 18px;
        border-radius: 18px;
    }

    .info-box h2 {
        font-size: 1.1rem;
        margin-bottom: 20px;
        padding-bottom: 12px;
    }

    .info-box h3 {
        font-size: 0.92rem;
    }

    .info-box p,
    .info-box ul,
    .info-box ol {
        font-size: 0.85rem;
    }

    .formula {
        padding: 14px 16px;
        border-radius: 10px;
    }

    .formula p {
        font-size: 0.82rem;
    }
}

/* ── Mobile Medium (≤ 540px): results stack to 1 column ── */
@media (max-width: 540px) {
    .nav-container {
        padding: 0 12px;
        height: 52px;
    }
    
    .logo {
        font-size: 0.95rem;
    }
    
    .nav-links li {
        padding: 8px 14px;
    }
    
    .container {
        padding: 10px 10px 28px;
        gap: 12px;
    }

    .header {
        padding: 12px 14px;
        border-radius: 16px;
        flex-direction: column;
        align-items: flex-start;
    }

    .header-top {
        width: 100%;
    }
    
    .header-content {
        width: 100%;
    }

    h1 {
        font-size: clamp(0.95rem, 2.5vw, 1.15rem);
    }

    .theme-btn {
        width: 40px;
        height: 40px;
    }

    .theme-switcher-icon {
        font-size: 1.2rem;
    }

    /* Ensure cards are equal width on mobile */
    .input-card,
    .results-card {
        width: 100%;
        min-width: 0;
    }

    /* Stack result cards at 2 columns */
    .results-section {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    /* Make Final Amount span full width */
    .result-card:last-child {
        grid-column: 1 / -1;
    }

    .result-card {
        padding: 16px 12px;
    }

    .result-label {
        font-size: 0.62rem;
        white-space: normal;
    }

    .result-value {
        font-size: clamp(0.95rem, 4vw, 1.15rem);
    }

    .result-value.final {
        font-size: clamp(1.05rem, 5vw, 1.3rem);
    }

    .chart-container {
        height: 210px;
    }

    .breakdown-card {
        padding: 16px 12px 0;
        border-radius: 16px;
    }

    /* Hide least-critical column on small screens to prevent overflow */
    .breakdown-table th:nth-child(4),
    .breakdown-table td:nth-child(4) {
        display: none;
    }
}

/* Ultra Small Phones (420px - 480px) - fine-tuned */
@media (max-width: 480px) and (min-width: 380px) {
    .nav-container {
        padding: 0 12px;
        height: 54px;
    }
    
    .logo {
        font-size: 0.98rem;
    }
    
    .container {
        padding: 10px 12px 28px;
    }

    .header {
        padding: 12px 14px;
        gap: 8px;
    }
    
    h1 {
        font-size: clamp(0.98rem, 2.8vw, 1.2rem);
    }

    .theme-btn {
        width: 40px;
        height: 40px;
    }
    
    .theme-switcher-icon {
        font-size: 1.2rem;
    }

    /* Ensure cards are equal width on ultra-small phones */
    .input-card,
    .results-card {
        width: 100%;
        min-width: 0;
    }

    .result-value {
        font-size: clamp(0.93rem, 3.8vw, 1.1rem);
    }
    
    .chart-container {
        height: 200px;
    }
}

/* Mobile Extra Small (≤ 380px): tightest layout */
@media (max-width: 380px) {
    .nav-container {
        padding: 0 10px;
        height: 50px;
    }
    
    .logo {
        font-size: 0.9rem;
    }
    
    .nav-links li {
        padding: 6px 12px;
    }
    
    .container {
        padding: 8px 8px 24px;
        gap: 10px;
    }

    .header {
        padding: 10px 12px;
        border-radius: 14px;
        flex-direction: column;
        align-items: stretch;
    }
    
    .header-content {
        width: 100%;
    }

    h1 {
        font-size: clamp(0.9rem, 2vw, 1rem);
        margin-bottom: 0;
    }

    .theme-btn {
        width: 38px;
        height: 38px;
        border-radius: 10px;
    }
    
    .theme-switcher-icon {
        font-size: 1.15rem;
    }

    /* Ensure cards are equal width on extra small screens */
    .input-card,
    .results-card {
        padding: 14px 12px;
        border-radius: 14px;
        width: 100%;
        min-width: 0;
    }

    .input-card h2,
    .results-card h2 {
        font-size: 0.95rem;
        margin-bottom: 14px;
        padding-bottom: 10px;
    }

    .result-card {
        padding: 14px 10px;
    }

    .result-label {
        font-size: 0.58rem;
    }

    .result-value {
        font-size: clamp(0.9rem, 3.5vw, 1rem);
    }

    .result-value.final {
        font-size: clamp(0.98rem, 4vw, 1.15rem);
    }

    .chart-container {
        height: 180px;
    }

    .breakdown-card {
        padding: 14px 12px 0;
    }

    /* Also hide Yearly Invested column on very small screens */
    .breakdown-table th:nth-child(3),
    .breakdown-table td:nth-child(3) {
        display: none;
    }
}

/* Extra Small Phones (≤ 350px) */
@media (max-width: 350px) {
    .nav-container {
        padding: 0 8px;
        height: 48px;
    }
    
    .logo {
        font-size: 0.85rem;
    }
    
    .nav-links li {
        padding: 6px 10px;
    }
    
    .container {
        padding: 6px 8px 20px;
        gap: 8px;
    }

    .header {
        padding: 10px 10px;
        border-radius: 12px;
        flex-direction: column;
        gap: 8px;
    }
    
    h1 {
        font-size: clamp(0.85rem, 1.8vw, 0.95rem);
    }

    .theme-btn {
        width: 36px;
        height: 36px;
        border-radius: 8px;
    }

    .theme-switcher-icon {
        font-size: 1.1rem;
    }
    
    .input-card,
    .results-card {
        padding: 12px 10px;
        border-radius: 12px;
    }
    
    .input-card h2,
    .results-card h2 {
        font-size: 0.9rem;
    }
    
    .breakdown-card {
        padding: 12px 10px 0;
        border-radius: 12px;
    }
    
    .result-card {
        padding: 12px 10px;
    }
    
    .chart-container {
        height: 160px;
    }
    
    input[type="number"],
    select {
        padding: 8px 10px;
        font-size: 0.82rem;
    }
    
    .submit-btn {
        padding: 11px 14px;
        font-size: 0.8rem;
    }
}

/* ===========================
   SIP + SWP COMBINED PAGE
   =========================== */

/* Phase description subtitle */
.phase-desc {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin: -16px 0 18px;
    opacity: 0.8;
}

/* Centered Calculate button row */
.sipswp-calculate-row {
    display: flex;
    justify-content: center;
}

.sipswp-calculate-row .submit-btn {
    min-width: 200px;
    justify-content: center;
}

/* ── Corpus Bridge Card ── */
.corpus-bridge-card {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1.5px solid var(--accent-color);
    border-radius: 16px;
    padding: 16px 24px;
    box-shadow: 0 0 0 3px rgba(99,102,241,0.08), var(--card-shadow);
}

.corpus-bridge-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
    flex-wrap: wrap;
}

.corpus-bridge-phase {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 0.82rem;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.corpus-bridge-arrow {
    color: var(--accent-color);
    display: flex;
    align-items: center;
    opacity: 0.7;
}

.corpus-bridge-value-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.corpus-bridge-label {
    font-size: 0.72rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 600;
}

.corpus-bridge-value {
    font-family: 'Fira Code', monospace;
    font-size: 1.18rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-color), var(--success-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.01em;
}

/* Phase label accent on SIP/SWP result cards */
.sipswp-results-sip h2::before {
    background: linear-gradient(180deg, var(--accent-color), var(--accent-light));
}

.sipswp-results-swp h2::before {
    background: linear-gradient(180deg, #ef4444, #f97316);
}

@media (max-width: 600px) {
    .corpus-bridge-inner {
        gap: 10px;
    }
    .corpus-bridge-value {
        font-size: 1rem;
    }
    .corpus-bridge-arrow {
        display: none;
    }
    .corpus-bridge-phase {
        font-size: 0.72rem;
    }
    .sipswp-calculate-row .submit-btn {
        min-width: 100%;
    }
}