/* ============================================================
   Astraed — Yuno Design System (per docs/yuno-design-system/design.md)
   Light + dark via prefers-color-scheme + manual [data-theme]
   ============================================================ */

/* Self-hosted Die Grotesk VF (variable). Single file per style covers full weight range. */
@font-face {
    font-family: 'Die Grotesk VF';
    src: url('../fonts/die-grotesk/DieGroteskVF-Roman.woff2') format('woff2-variations'),
         url('../fonts/die-grotesk/DieGroteskVF-Roman.woff2') format('woff2');
    font-weight: 100 900;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Die Grotesk VF';
    src: url('../fonts/die-grotesk/DieGroteskVF-Italic.woff2') format('woff2-variations'),
         url('../fonts/die-grotesk/DieGroteskVF-Italic.woff2') format('woff2');
    font-weight: 100 900;
    font-style: italic;
    font-display: swap;
}

/* ------------------------------------------------------------
   Theme variables
   ------------------------------------------------------------ */

/* Light theme (default + manual override).
   Elevation in light mode: brighter = more elevated.
   page=off-white, sections=slightly pushed-down, nav/cards=pure white. */
:root,
:root[data-theme="light"] {
    color-scheme: light;
    --canvas:   #FAFAFA;   /* page bg */
    --canvas-2: #F4F4F4;   /* secondary sections (formerly bg-black bands) */
    --canvas-3: #FFFFFF;   /* nav, cards — opaque white */
    --ink:      #0A0A0A;
    --line:     rgba(10, 10, 10, 0.10);

    --type-display:  clamp(48px, 7vw, 96px);
    --type-h2:       clamp(28px, 3vw, 36px);
    --type-h3:       22px;
    --type-pull:     clamp(28px, 3vw, 40px);
    --type-body:     19px;
    --type-small:    16px;
    --type-meta:     14px;
    --type-eyebrow:  11px;
    --type-nav:      15px;
}

/* Dark via system preference — only when no manual override.
   True-black page per design.md, elevation = brighter. */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        color-scheme: dark;
        --canvas:   #000000;   /* true black per design.md */
        --canvas-2: #060606;   /* bg-card */
        --canvas-3: #0A0A0A;   /* bg-elevated — nav, footer */
        --ink:      #FFFFFF;
        --line:     rgba(255, 255, 255, 0.12);
    }
}

/* Dark via manual toggle */
:root[data-theme="dark"] {
    color-scheme: dark;
    --canvas:   #000000;
    --canvas-2: #060606;
    --canvas-3: #0A0A0A;
    --ink:      #FFFFFF;
    --line:     rgba(255, 255, 255, 0.12);
}

/* ------------------------------------------------------------
   Token-respecting utility classes
   Plain CSS — Tailwind v4 browser CDN does not process @theme
   from external stylesheets, so we define these explicitly.
   ------------------------------------------------------------ */

/* Solid backgrounds */
.bg-canvas    { background-color: var(--canvas); }
.bg-canvas-2  { background-color: var(--canvas-2); }
.bg-canvas-3  { background-color: var(--canvas-3); }
.bg-ink       { background-color: var(--ink); }

/* Alpha-modified backgrounds */
.bg-canvas-3-10 { background-color: color-mix(in srgb, var(--canvas-3) 10%, transparent); }
.bg-canvas-3-50 { background-color: color-mix(in srgb, var(--canvas-3) 50%, transparent); }
.bg-canvas-3-95 { background-color: color-mix(in srgb, var(--canvas-3) 95%, transparent); }
.bg-ink-80      { background-color: color-mix(in srgb, var(--ink) 80%, transparent); }
.bg-ink-90      { background-color: color-mix(in srgb, var(--ink) 90%, transparent); }

/* Solid text */
.text-canvas { color: var(--canvas); }
.text-ink    { color: var(--ink); }

/* Alpha-modified text */
.text-ink-40 { color: color-mix(in srgb, var(--ink) 40%, transparent); }
.text-ink-45 { color: color-mix(in srgb, var(--ink) 45%, transparent); }
.text-ink-50 { color: color-mix(in srgb, var(--ink) 50%, transparent); }
.text-ink-65 { color: color-mix(in srgb, var(--ink) 65%, transparent); }
.text-ink-70 { color: color-mix(in srgb, var(--ink) 70%, transparent); }
.text-ink-80 { color: color-mix(in srgb, var(--ink) 80%, transparent); }
.text-ink-85 { color: color-mix(in srgb, var(--ink) 85%, transparent); }

/* Borders */
.border-ink-10 { border-color: color-mix(in srgb, var(--ink) 10%, transparent); }
.border-ink-15 { border-color: color-mix(in srgb, var(--ink) 15%, transparent); }

/* Hover variants */
.hover\:bg-ink-80:hover { background-color: color-mix(in srgb, var(--ink) 80%, transparent); }
.hover\:bg-ink-90:hover { background-color: color-mix(in srgb, var(--ink) 90%, transparent); }
.hover\:text-ink:hover  { color: var(--ink); }

/* ------------------------------------------------------------
   Type scale (design.md spec)
   Consumes the --type-* custom properties defined in :root.
   ------------------------------------------------------------ */
.type-display { font-size: var(--type-display); line-height: 1.04; letter-spacing: -0.02em; }
.type-h2      { font-size: var(--type-h2);      line-height: 1.15; letter-spacing: -0.01em; }
.type-h3      { font-size: var(--type-h3);      line-height: 1.3;  letter-spacing: 0; }
.type-pull    { font-size: var(--type-pull);    line-height: 1.25; letter-spacing: -0.01em; }
.type-body    { font-size: var(--type-body);    line-height: 1.55; letter-spacing: 0; }
.type-small   { font-size: var(--type-small);   line-height: 1.55; letter-spacing: 0; }
.type-meta    { font-size: var(--type-meta);    line-height: 1.4;  letter-spacing: 0.02em; }
.type-eyebrow { font-size: var(--type-eyebrow); line-height: 1.2;  letter-spacing: 0.06em; text-transform: uppercase; }
.type-nav     { font-size: var(--type-nav);     line-height: 1;    letter-spacing: 0; }

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

@media (prefers-reduced-motion: no-preference) {
    html { scroll-padding-top: 100px; }
}

body {
    font-family: 'Die Grotesk VF', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-weight: 400;
    background-color: var(--canvas);
    color: var(--ink);
    transition: background-color 0.2s ease, color 0.2s ease;
}

/* Headings: regular weight carries scale (design.md principle).
   Markup may locally override with font-semibold etc.; that wins. */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Die Grotesk VF', ui-sans-serif, system-ui, sans-serif;
    font-weight: 450;
    letter-spacing: -0.01em;
    font-feature-settings: 'kern' 1, 'liga' 1;
}

h1 { letter-spacing: -0.02em; line-height: 1.04; }
h2 { line-height: 1.15; }
h3 { line-height: 1.3; }

/* Subtle noise overlay — works in both modes */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.015;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* ------------------------------------------------------------
   Navigation — opaque per design.md ("Always sharp")
   ------------------------------------------------------------ */
nav {
    will-change: transform;
    transform: translateZ(0);
}

nav a:not(.inline-block) { position: relative; }

nav a:not(.inline-block)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--ink);
    transition: width 0.16s ease-out;
}

nav a:not(.inline-block):hover::after { width: 100%; }

/* Focus rings — accent-tinted */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
    outline: 2px solid var(--color-accent, #B8E0BC);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ------------------------------------------------------------
   Section accents
   ------------------------------------------------------------ */
.radial-gradient-bg {
    background: radial-gradient(ellipse at top, color-mix(in srgb, var(--ink) 3%, transparent) 0%, transparent 50%);
}

/* CTA — primary inverted button. No glow-pink; subtle ink shadow only. */
.cta-glow:hover {
    box-shadow: 0 0 24px color-mix(in srgb, var(--ink) 18%, transparent);
}

.cta-glow:active {
    transform: translateY(-1px) scale(0.98);
}

/* ------------------------------------------------------------
   Theme toggle
   ------------------------------------------------------------ */
.theme-toggle {
    width: 36px;
    height: 36px;
    border-radius: 9999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--line);
    color: var(--ink);
    cursor: pointer;
    transition: background-color 0.16s ease-out, border-color 0.16s ease-out, transform 0.16s ease-out;
}

.theme-toggle:hover {
    background: color-mix(in srgb, var(--ink) 6%, transparent);
    border-color: color-mix(in srgb, var(--ink) 20%, transparent);
}

.theme-toggle:active { transform: scale(0.94); }

.theme-toggle svg { width: 18px; height: 18px; }

.theme-toggle .icon-sun  { display: none; }
.theme-toggle .icon-moon { display: block; }

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-toggle .icon-sun  { display: block; }
    :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
}

:root[data-theme="dark"]  .theme-toggle .icon-sun  { display: block; }
:root[data-theme="dark"]  .theme-toggle .icon-moon { display: none; }
:root[data-theme="light"] .theme-toggle .icon-sun  { display: none; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ------------------------------------------------------------
   Tab interface
   ------------------------------------------------------------ */
.tab-panel {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.tab-panel.active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

.tab-button.active {
    color: var(--ink);
    font-weight: 600;
}

.overflow-x-auto::-webkit-scrollbar { display: none; }
.overflow-x-auto {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

.tab-slider {
    position: absolute;
    bottom: 0;
    height: 2px;
    background-color: var(--ink);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-nav-container { position: relative; }

.tab-fade-left,
.tab-fade-right {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 60px;
    pointer-events: none;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tab-fade-left  { left:  0; background: linear-gradient(to right, var(--canvas-2), transparent); }
.tab-fade-right { right: 0; background: linear-gradient(to left,  var(--canvas-2), transparent); }

.tab-fade-left.visible,
.tab-fade-right.visible { opacity: 1; }

/* ------------------------------------------------------------
   Video
   ------------------------------------------------------------ */
video {
    display: block;
    animation: videoFadeIn 0.8s ease-out;
}

@keyframes videoFadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* ------------------------------------------------------------
   Scroll-triggered animations
   ------------------------------------------------------------ */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-up:nth-child(1) { transition-delay: 0s; }
.fade-in-up:nth-child(2) { transition-delay: 0.15s; }
.fade-in-up:nth-child(3) { transition-delay: 0.3s; }
.fade-in-up:nth-child(4) { transition-delay: 0.45s; }
.fade-in-up:nth-child(5) { transition-delay: 0.6s; }
.fade-in-up:nth-child(6) { transition-delay: 0.75s; }

.fade-in {
    opacity: 0;
    transition: opacity 0.8s ease-out;
}

.fade-in.visible { opacity: 1; }

.scale-in {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* ------------------------------------------------------------
   Logo carousel
   ------------------------------------------------------------ */
@keyframes scroll-left {
    0%   { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.logo-carousel {
    display: flex;
    align-items: center;
    width: 100%;
    overflow: hidden;
}

.logo-track {
    display: flex;
    align-items: center;
    gap: 4rem;
    animation: scroll-left 40s linear infinite;
    will-change: transform;
}

.logo-track:hover { animation-play-state: paused; }

.logo-item {
    flex-shrink: 0;
    height: 2.5rem;
    width: auto;
    opacity: 0.4;
    transition: opacity 0.3s ease, filter 0.3s ease;
    filter: grayscale(100%);
}

.logo-item:hover {
    opacity: 1;
    filter: grayscale(0%);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .logo-item        { filter: grayscale(100%) invert(1); }
    :root:not([data-theme="light"]) .logo-item:hover  { filter: grayscale(0%)   invert(0); }
}

:root[data-theme="dark"] .logo-item       { filter: grayscale(100%) invert(1); }
:root[data-theme="dark"] .logo-item:hover { filter: grayscale(0%)   invert(0); }

.logo-item.loading {
    background: linear-gradient(90deg,
        color-mix(in srgb, var(--ink) 5%, transparent) 25%,
        color-mix(in srgb, var(--ink) 10%, transparent) 50%,
        color-mix(in srgb, var(--ink) 5%, transparent) 75%);
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
    opacity: 0.3;
}

@keyframes shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

@media (max-width: 768px) {
    .logo-item  { height: 2rem; }
    .logo-track { gap: 3rem; }
}

/* ------------------------------------------------------------
   Feature tab cards
   ------------------------------------------------------------ */
.feature-tab-item {
    background: transparent;
    border: 1px solid transparent;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.feature-tab-item.active {
    background: var(--canvas-3);
    border-color: var(--line);
    box-shadow: 0 2px 8px color-mix(in srgb, var(--ink) 4%, transparent);
}

.feature-tab-item:hover {
    background: color-mix(in srgb, var(--canvas-3) 70%, transparent);
}

.feature-tab-item.active:hover { background: var(--canvas-3); }

.feature-video-container { will-change: transform; }

.feature-video {
    display: none;
    opacity: 0;
    transition: opacity 0.4s ease-in-out;
}

.feature-video.active {
    display: block;
    opacity: 1;
}

@media (max-width: 1024px) {
    .feature-video-container {
        position: relative !important;
        top: auto !important;
    }
}

.feature-video-mobile {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-tab-item.active .feature-video-mobile { max-height: 1000px; }

@media (min-width: 1024px) {
    .feature-video-mobile { display: none !important; }
}

@media (max-width: 1023px) {
    .feature-video-container { display: none !important; }
}

.chevron-icon {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-tab-item.active .chevron-icon { transform: rotate(180deg); }

@media (min-width: 1024px) {
    .chevron-icon { display: none !important; }
}

@media (max-width: 1023px) {
    .feature-tab-item:active { transform: scale(0.98); }
}


/* Extracted from index.html */
/* Nav logo theme swap — mirrors .theme-toggle .icon-* pattern */
        .logo-light {
            display: inline-block;
        }

        .logo-dark {
            display: none;
        }

        @media (prefers-color-scheme: dark) {
            :root:not([data-theme="light"]) .logo-light {
                display: none;
            }

            :root:not([data-theme="light"]) .logo-dark {
                display: inline-block;
            }
        }

        :root[data-theme="dark"] .logo-light {
            display: none;
        }

        :root[data-theme="dark"] .logo-dark {
            display: inline-block;
        }

        :root[data-theme="light"] .logo-light {
            display: inline-block;
        }

        :root[data-theme="light"] .logo-dark {
            display: none;
        }