/* ==========================================================================
   VoizHub — shared design tokens + components
   Palette, type, and spacing are the existing brand system (see color_palette.jpg).
   ========================================================================== */

:root {
    --black: #0F1115;
    --ink: #20242A;
    --primary: #3568D4;
    --primary-light: #5C86E6;
    --primary-tint: rgba(53, 104, 212, 0.10);
    --primary-tint-strong: rgba(53, 104, 212, 0.16);
    --muted: #64748B;
    --border: #D8DEE8;
    --bg: #F3F4F6;
    --surface: #FFFFFF;
    --cream: #FFFAF7;
    --header-bg: rgba(243, 244, 246, 0.78);
    --shadow-color: rgba(15, 17, 21, 0.14);
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
    --transition: all 0.2s var(--ease-soft);
    --shell: 1180px;
    --theme-transition: background 0.35s var(--ease-soft), color 0.35s var(--ease-soft), border-color 0.35s var(--ease-soft);
    --grain-dot: rgba(15,17,21,0.035);
    --wave-fill: rgba(15,17,21,0.45);
    --card-glass-bg: rgba(15,17,21,0.03);
    --card-glass-border: rgba(15,17,21,0.08);
}

/* ---------- Dark theme tokens ---------- */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --ink: #ECEDF1;
        --muted: #9AA2B1;
        --border: #2B2F37;
        --bg: #14161A;
        --surface: #1C1F26;
        --primary-tint: rgba(92, 134, 230, 0.16);
        --primary-tint-strong: rgba(92, 134, 230, 0.24);
        --header-bg: rgba(20, 22, 26, 0.78);
        --shadow-color: rgba(0, 0, 0, 0.45);
        --grain-dot: rgba(255,255,255,0.05);
        --wave-fill: rgba(255,255,255,0.55);
        --card-glass-bg: rgba(255,255,255,0.035);
        --card-glass-border: rgba(255,255,255,0.10);
    }
}
:root[data-theme="dark"] {
    --ink: #ECEDF1;
    --muted: #9AA2B1;
    --border: #2B2F37;
    --bg: #14161A;
    --surface: #1C1F26;
    --primary-tint: rgba(92, 134, 230, 0.16);
    --primary-tint-strong: rgba(92, 134, 230, 0.24);
    --header-bg: rgba(20, 22, 26, 0.78);
    --shadow-color: rgba(0, 0, 0, 0.45);
    --grain-dot: rgba(255,255,255,0.05);
    --wave-fill: rgba(255,255,255,0.55);
    --card-glass-bg: rgba(255,255,255,0.035);
    --card-glass-border: rgba(255,255,255,0.10);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body, .feature-card, .demo-shell, .demo-bar, .ba-panel, .guide-step, .plan-card,
.faq-item, footer, .language-toggle, .theme-toggle, .social-icon, .btn-secondary {
    transition: var(--theme-transition);
}

html { scroll-padding-top: 92px; scroll-behavior: smooth; }

a:focus-visible, button:focus-visible, input:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}

body {
    font-family: 'Sora', -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--ink);
    line-height: 1.6;
    overflow-x: hidden;
}

body.khmer { font-family: 'Hanuman', 'Khmer UI', serif; }

h1, h2, h3, h4 {
    font-family: 'Sora', sans-serif;
    font-weight: 700;
    line-height: 1.12;
    color: var(--ink);
    text-wrap: balance;
}

body.khmer h1, body.khmer h2, body.khmer h3, body.khmer h4 {
    font-family: 'Hanuman', 'Khmer UI', serif;
}

.mono {
    font-family: 'JetBrains Mono', 'SFMono-Regular', Menlo, monospace;
    font-variant-numeric: tabular-nums;
}

.container {
    width: 90%;
    max-width: var(--shell);
    margin: 0 auto;
    padding: 0 20px;
}

/* ---------- Header ---------- */
header {
    padding: 1rem 0;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--header-bg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    transition: background 0.3s var(--ease-soft), box-shadow 0.3s var(--ease-soft);
}

header.on-dark { background: rgba(15, 17, 21, 0.72); border-bottom-color: rgba(255,255,255,0.08); }

.navbar { display: flex; justify-content: space-between; align-items: center; }

.logo {
    font-family: 'Sora', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--ink);
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

header.on-dark .logo, header.on-dark .nav-links a { color: var(--cream); }

.logo-mark { width: 32px; height: 32px; flex-shrink: 0; transition: transform 0.4s var(--ease); }
.logo:hover .logo-mark { transform: rotate(-6deg) scale(1.05); }
.logo-bolt { width: 0.6em; height: 0.6em; margin: 0 0.08em; vertical-align: -0.05em; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--ink);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.92rem;
    position: relative;
    padding: 4px 0;
}

.nav-links a::after {
    content: "";
    position: absolute;
    left: 0; bottom: -2px;
    width: 100%; height: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.25s var(--ease-soft);
}

.nav-links a:hover::after, .nav-links a[aria-current="page"]::after { transform: scaleX(1); }

.nav-right { display: flex; align-items: center; gap: 14px; }

.language-toggle {
    background: rgba(255,255,255,0.5);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    padding: 3px;
    display: flex;
    align-items: center;
    gap: 2px;
}

header.on-dark .language-toggle { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.14); }

.language-toggle button {
    font-family: inherit;
    font-weight: 600;
    font-size: 0.82rem;
    color: var(--muted);
    background: transparent;
    border: none;
    border-radius: var(--radius-full);
    padding: 7px 13px;
    min-height: 34px;
    cursor: pointer;
    transition: var(--transition);
}

#langKm { font-family: 'Hanuman', 'Khmer UI', serif; font-weight: 700; font-size: 0.92rem; white-space: nowrap; }
header.on-dark .language-toggle button { color: #C7CCD6; }
.language-toggle button:hover { color: var(--ink); }
header.on-dark .language-toggle button:hover { color: var(--cream); }
.language-toggle button[aria-pressed="true"] { background: var(--surface); color: var(--primary); }
header.on-dark .language-toggle button[aria-pressed="true"] { background: rgba(255,255,255,0.16); color: #A9C4F5; }
:root[data-theme="dark"] .language-toggle button { color: #C7CCD6; }
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .language-toggle button { color: #C7CCD6; }
}

.theme-toggle {
    width: 38px; height: 38px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.5);
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    color: var(--ink);
    position: relative;
    flex-shrink: 0;
}
header.on-dark .theme-toggle { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.14); color: var(--cream); }
.theme-toggle svg { width: 17px; height: 17px; position: absolute; opacity: 0; transform: rotate(-60deg) scale(0.5); transition: opacity 0.3s var(--ease-soft), transform 0.4s var(--ease-soft); }
:root[data-theme-mode="light"] .theme-toggle .icon-sun,
:root[data-theme-mode="system"] .theme-toggle .icon-system,
:root[data-theme-mode="dark"] .theme-toggle .icon-moon { opacity: 1; transform: rotate(0deg) scale(1); }
.theme-toggle:hover { border-color: var(--primary); color: var(--primary); }

/* char-wave hover, applied via JS-split spans (mirrors Wispr's setupButtonAnimations) */
.btn .char { display: inline-block; }

.nav-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.nav-toggle span {
    display: block;
    width: 22px; height: 2px;
    background: var(--ink);
    margin: 5px 0;
    transition: var(--transition);
}
header.on-dark .nav-toggle span { background: var(--cream); }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0.85rem 1.9rem;
    border-radius: var(--radius-full);
    text-decoration: none;
    font-family: 'Sora', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    transition: transform 0.25s var(--ease-soft), background 0.25s var(--ease-soft), box-shadow 0.25s var(--ease-soft);
    border: none;
    cursor: pointer;
    position: relative;
}

.btn-sm { padding: 0.55rem 1.3rem; font-size: 0.85rem; }

.btn-primary { background: var(--primary); color: var(--cream); box-shadow: 0 1px 0 rgba(0,0,0,0.05); }
.btn-primary:hover { background: var(--black); transform: translateY(-2px); box-shadow: 0 10px 24px -8px rgba(53,104,212,0.55); }

.btn-light { background: var(--cream); color: var(--black); }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 10px 24px -8px rgba(0,0,0,0.35); }

.btn-secondary { background: var(--bg); color: var(--ink); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--primary); transform: translateY(-2px); }

.btn-outline-dark { background: transparent; color: var(--cream); border: 1px solid rgba(255,255,255,0.28); }
.btn-outline-dark:hover { border-color: var(--cream); transform: translateY(-2px); }

.btn-text { background: transparent; color: var(--primary); padding: 0; font-weight: 600; }
.btn-text:hover { text-decoration: underline; }

/* magnetic hover wrapper */
.magnetic { display: inline-block; }

/* ---------- Page shell for interior pages ---------- */
.page-hero {
    padding: 10rem 0 3.5rem;
    text-align: center;
}
.page-eyebrow {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 1rem;
}
.page-hero h1 { font-size: 2.6rem; letter-spacing: -0.02em; margin-bottom: 1rem; }
.page-hero p { color: var(--muted); max-width: 560px; margin: 0 auto; font-size: 1.05rem; }

/* ---------- Sections ---------- */
.section { padding: 5.5rem 0; }
.section-tight { padding: 3rem 0; }

.section-title { text-align: center; margin-bottom: 3.25rem; }
.section-eyebrow {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 0.9rem;
}
.section-title h2 { font-size: 2.1rem; margin-bottom: 0.75rem; }
.section-title p { font-size: 1.05rem; color: var(--muted); max-width: 560px; margin: 0 auto; }

.animate-on-scroll {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.animate-on-scroll.visible { opacity: 1; transform: translateY(0); }
.animate-on-scroll.delay-1 { transition-delay: 0.08s; }
.animate-on-scroll.delay-2 { transition-delay: 0.16s; }
.animate-on-scroll.delay-3 { transition-delay: 0.24s; }

/* ---------- Footer ---------- */
footer {
    padding: 4rem 0 2.5rem;
    border-top: 1px solid var(--border);
    background: var(--surface);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.footer-brand p { color: var(--muted); margin: 1rem 0 1.4rem; font-size: 0.92rem; max-width: 280px; }

.footer-col h4 {
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 1rem;
    font-weight: 700;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.7rem; }
.footer-col a { color: var(--ink); text-decoration: none; font-size: 0.92rem; transition: var(--transition); }
.footer-col a:hover { color: var(--primary); }

.social-row { display: flex; gap: 10px; margin-top: 1.2rem; }
.social-icon {
    width: 38px; height: 38px;
    border-radius: var(--radius-full);
    background: var(--bg);
    border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    color: var(--ink);
    transition: var(--transition);
}
.social-icon:hover { background: var(--black); color: var(--cream); border-color: var(--black); transform: translateY(-3px); }
.social-icon svg { width: 17px; height: 17px; }

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    font-size: 0.85rem;
    color: var(--muted);
    flex-wrap: wrap;
    gap: 1rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .nav-links { display: none; }
    .nav-toggle { display: block; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .page-hero { padding: 8.5rem 0 3rem; }
    .page-hero h1 { font-size: 2rem; }
    .section { padding: 3.75rem 0; }
    .section-title h2 { font-size: 1.7rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
}