/* ===========================================================================
   TUNGSTEN SKYLARK — site layout (site.css)
   Depends on the tokens in ts-brand.css.
   =========================================================================== */

/* --------------------------------------------------------------- reset -- */

*, *::before, *::after { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
}

img { display: block; max-width: 100%; }

button {
    font: inherit;
    color: inherit;
    background: none;
    border: none;
    cursor: pointer;
}

a { color: inherit; }

::selection {
    background: var(--ts-glow-strong);
}

:focus-visible {
    outline: 2px solid var(--ts-accent);
    outline-offset: 3px;
    border-radius: 4px;
}

/* ---------------------------------------------------------- primitives -- */

.container {
    width: min(var(--content-max), 100% - 2 * var(--sp-3));
    margin-inline: auto;
}

.kicker {
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ts-accent);
}

.section {
    padding-block: var(--sp-7);
    scroll-margin-top: 88px;
}

.section-head {
    max-width: 640px;
    margin-bottom: var(--sp-5);
}

.section-head h2 {
    font-weight: 500;
    font-size: clamp(1.375rem, 2.4vw, 1.625rem);
    letter-spacing: 0.02em;
    text-transform: uppercase;
    margin: var(--sp-1) 0;
}

.section-head p {
    color: var(--ts-text-soft);
    max-width: 56ch;
}

/* spark divider — five particles, like the icon's tail */
.spark-divider {
    display: flex;
    justify-content: center;
    gap: var(--sp-2);
    padding-block: var(--sp-3);
}
.spark-divider span {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--ts-accent-soft);
    opacity: 0.8;
}
.spark-divider span:nth-child(2) { width: 5px; height: 5px; opacity: 0.62; }
.spark-divider span:nth-child(3) { width: 4px; height: 4px; opacity: 0.45; }
.spark-divider span:nth-child(4) { width: 3px; height: 3px; opacity: 0.3; }
.spark-divider span:nth-child(5) { width: 2px; height: 2px; opacity: 0.18; }

/* buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-1);
    min-height: 44px;               /* Apple HIG touch target */
    padding: 0 var(--sp-3);
    border-radius: 8px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 15px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-decoration: none;
    transition: transform 0.15s ease, background-color 0.2s ease,
                box-shadow 0.2s ease, color 0.2s ease;
}
.btn-primary {
    background: var(--ts-accent);
    color: var(--ts-accent-ink);
}
.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px var(--ts-glow-strong);
}
.btn-ghost {
    border: 1px solid var(--ts-line-strong);
    color: var(--ts-text);
}
.btn-ghost:hover {
    border-color: var(--ts-accent);
    color: var(--ts-accent);
}

/* badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px solid var(--ts-line-strong);
    color: var(--ts-text-soft);
}
.badge::before {
    content: '';
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--ts-accent);
}
.badge-solid {
    border-color: transparent;
    background: var(--ts-accent);
    color: var(--ts-accent-ink);
}
.badge-solid::before { background: var(--ts-accent-ink); }

/* light/dark asset swapping (icons) */
[data-mode='dark'] { display: none; }
html[data-appearance='dark'] [data-mode='light'] { display: none; }
html[data-appearance='dark'] [data-mode='dark']  { display: block; }
@media (prefers-color-scheme: dark) {
    html[data-appearance='auto'] [data-mode='light'],
    html:not([data-appearance]) [data-mode='light'] { display: none; }
    html[data-appearance='auto'] [data-mode='dark'],
    html:not([data-appearance]) [data-mode='dark'] { display: block; }
}

/* --------------------------------------------------------------- header -- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: color-mix(in srgb, var(--ts-bg) 86%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--ts-line);
    transition: background-color 0.3s ease;
}

.header-inner {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    padding-block: var(--sp-2);
}

.wordmark {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    min-width: 160px;                 /* brand minimum lockup width */
}
.wordmark img { width: 32px; height: 32px; }
.wordmark .name {
    font-weight: 700;
    font-size: 17px;
    letter-spacing: -0.02em;          /* −2% tracking per brand spec */
    text-transform: uppercase;
    white-space: nowrap;
}
.wordmark .name em {
    font-style: normal;
    color: var(--ts-accent);
}

.site-nav {
    display: flex;
    gap: var(--sp-1);
    margin-left: auto;
    margin-right: auto;
}
.site-nav a {
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--ts-text-soft);
    padding: 8px 12px;
    border-radius: 6px;
    transition: color 0.2s ease, background-color 0.2s ease;
}
.site-nav a:hover { color: var(--ts-text); }
.site-nav a.active {
    color: var(--ts-accent);
    background: var(--ts-glow);
}

/* appearance switcher */
.appearance {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-1);
}
.appearance-label {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ts-text-soft);
}
.seg {
    display: inline-flex;
    border: 1px solid var(--ts-line-strong);
    border-radius: 8px;
    overflow: hidden;
}
.seg button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 36px;
    color: var(--ts-text-soft);
    transition: background-color 0.2s ease, color 0.2s ease;
}
.seg button + button { border-left: 1px solid var(--ts-line); }
.seg button[aria-pressed='true'] {
    background: var(--ts-accent);
    color: var(--ts-accent-ink);
}
.seg svg { width: 15px; height: 15px; fill: currentColor; }

/* ----------------------------------------------------------------- hero -- */

.hero {
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(52% 64% at 78% 42%, var(--ts-glow), transparent 72%),
        linear-gradient(180deg, transparent, color-mix(in srgb, var(--ts-accent-soft) 8%, transparent));
    pointer-events: none;
}

.hero-inner {
    position: relative;
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: var(--sp-5);
    padding-block: var(--sp-7);
}

.hero h1 {
    font-weight: 700;
    font-size: clamp(2rem, 4.6vw, 3rem);
    letter-spacing: -0.02em;
    text-transform: uppercase;
    line-height: 1.12;
    margin: var(--sp-2) 0 var(--sp-3);
}
.hero h1 .glow-word { color: var(--ts-accent); }

.hero-sub {
    color: var(--ts-text-soft);
    font-size: 17px;
    max-width: 52ch;
    margin-bottom: var(--sp-4);
}
.hero-sub strong { color: var(--ts-text); font-weight: 500; }

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-2);
}

.hero-icon {
    position: relative;
    display: grid;
    place-items: center;
}
.hero-icon img {
    width: clamp(180px, 26vw, 300px);
    height: auto;
    border-radius: 22%;
}

.hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-2) var(--sp-5);
    margin-top: var(--sp-5);
    padding-top: var(--sp-3);
    border-top: 1px solid var(--ts-line);
}
.stat {
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: 0.06em;
    color: var(--ts-text-soft);
    text-transform: uppercase;
}
.stat b {
    color: var(--ts-accent);
    font-weight: 700;
    margin-right: 6px;
}

/* -------------------------------------------------------------- app cards */

.apps-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-3);
}

.app-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--sp-3);
    padding: var(--sp-4);
    background: var(--ts-surface);
    border: 1px solid var(--ts-line);
    border-radius: var(--radius);
    transition: background-color 0.3s ease, border-color 0.2s ease,
                transform 0.2s ease, box-shadow 0.2s ease;
}
.app-card:hover {
    transform: translateY(-3px);
    border-color: var(--ts-line-strong);
    box-shadow: 0 12px 40px var(--ts-glow);
}

.app-card-top {
    display: flex;
    align-items: flex-start;
    gap: var(--sp-2);
}
.app-card-top img {
    width: 72px;
    height: 72px;
    border-radius: 16px;
    flex-shrink: 0;
}
.app-card h3 {
    font-weight: 700;
    font-size: 22px;
    letter-spacing: -0.01em;
    text-transform: uppercase;
    margin-bottom: 4px;
}
.app-platforms {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ts-text-soft);
}
.app-tagline {
    font-size: 17px;
    color: var(--ts-text);
    margin: 0;
}
.app-features {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 10px;
}
.app-features li {
    display: flex;
    gap: 10px;
    font-size: 15px;
    color: var(--ts-text-soft);
    line-height: 1.45;
}
.app-features li::before {
    content: '▸';
    color: var(--ts-accent);
    flex-shrink: 0;
}
.app-features li b { color: var(--ts-text); font-weight: 500; }

.app-card-foot {
    margin-top: auto;
    padding-top: var(--sp-2);
    border-top: 1px solid var(--ts-line);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-2);
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ts-text-soft);
}

/* coming-soon veil — unreleased cards keep their shape, but the content
   hides behind a semi-transparent, theme-aware layer. The display:contents
   wrapper lets the hidden body stay flex-laid-out while being aria-hidden. */

.app-card-body { display: contents; }

/* unreleased cards don't lift on hover */
.app-card--soon:hover {
    transform: none;
    box-shadow: none;
}

.coming-soon {
    position: absolute;
    inset: 0;
    z-index: 1;
    display: grid;
    place-items: center;
    padding: var(--sp-4);
    border-radius: inherit;
    background: color-mix(in srgb, var(--ts-surface) 85%, transparent);
    backdrop-filter: blur(7px) saturate(0.9);
    -webkit-backdrop-filter: blur(7px) saturate(0.9);
    transition: background-color 0.3s ease;
}

.coming-soon-label {
    margin: 0;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.375rem, 2.4vw, 1.875rem);
    letter-spacing: 0.16em;
    text-transform: uppercase;
    text-align: center;
    color: var(--ts-accent);
    text-shadow: 0 2px 24px var(--ts-glow-strong);
}

/* ---------------------------------------------------------- theme library */

.themes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-2);
}

.theme-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--sp-2);
    text-align: left;
    padding: var(--sp-3);
    background: var(--ts-surface);
    border: 1px solid var(--ts-line);
    border-radius: var(--radius);
    transition: background-color 0.3s ease, border-color 0.2s ease,
                transform 0.15s ease, box-shadow 0.2s ease;
}
.theme-card:hover {
    transform: translateY(-3px);
    border-color: var(--ts-line-strong);
}
.theme-card.active {
    border-color: var(--ts-accent);
    box-shadow: 0 8px 28px var(--ts-glow-strong);
}
/* stretched hit area — the whole card is one real <button> */
.card-hit {
    position: absolute;
    inset: 0;
    z-index: 1;
    border-radius: inherit;
}
.card-hit:focus-visible {
    outline: 2px solid var(--ts-accent);
    outline-offset: -2px;
}

.theme-card-top {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--sp-1);
}
.theme-name {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 16px;
    letter-spacing: 0.01em;
    text-transform: uppercase;
}
.theme-family {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ts-text-soft);
}
.badge-default {
    margin-left: auto;
    margin-right: 8px;
}

.swatch-rows { display: grid; gap: 8px; }
.swatch-row {
    display: grid;
    grid-template-columns: 44px repeat(5, 1fr);
    gap: 6px;
    align-items: center;
}
.swatch-row .row-label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.14em;
    color: var(--ts-text-soft);
}
.swatch {
    height: 34px;
    border-radius: 6px;
    border: 1px solid var(--ts-line);
}
.swatch-legend {
    display: grid;
    grid-template-columns: 44px repeat(5, 1fr);
    gap: 6px;
}
.swatch-legend span {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.08em;
    color: var(--ts-text-soft);
    text-align: center;
}
.swatch-legend span:first-child { text-align: left; }

/* chip colours — read from the card's own data-theme, not the live theme */
.swatch-row[data-mode-set='light'] .sw-bg   { background: var(--th-bg-l); }
.swatch-row[data-mode-set='light'] .sw-surf { background: var(--th-surface-l); }
.swatch-row[data-mode-set='light'] .sw-text { background: var(--th-text-l); }
.swatch-row[data-mode-set='light'] .sw-acc  { background: var(--th-accent-l); }
.swatch-row[data-mode-set='light'] .sw-soft { background: var(--th-accent-soft-l); }
.swatch-row[data-mode-set='dark']  .sw-bg   { background: var(--th-bg-d); }
.swatch-row[data-mode-set='dark']  .sw-surf { background: var(--th-surface-d); }
.swatch-row[data-mode-set='dark']  .sw-text { background: var(--th-text-d); }
.swatch-row[data-mode-set='dark']  .sw-acc  { background: var(--th-accent-d); }
.swatch-row[data-mode-set='dark']  .sw-soft { background: var(--th-accent-soft-d); }

.theme-card-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-1);
}
.theme-tagline {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--ts-text-soft);
    line-height: 1.4;
}
.theme-apply {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ts-text-soft);
    padding: 6px 12px;
    border: 1px solid var(--ts-line-strong);
    border-radius: 999px;
    white-space: nowrap;
    transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}
.theme-card:hover .theme-apply {
    color: var(--ts-accent);
    border-color: var(--ts-accent);
}
.theme-card.active .theme-apply {
    background: var(--ts-accent);
    border-color: transparent;
    color: var(--ts-accent-ink);
}

.theme-note {
    margin-top: var(--sp-3);
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--ts-text-soft);
}
.theme-note button {
    text-decoration: underline;
    text-underline-offset: 3px;
    color: var(--ts-accent);
}

/* overview sheet */
.theme-sheet {
    margin-top: var(--sp-5);
    border: 1px solid var(--ts-line);
    border-radius: var(--radius);
    overflow: hidden;
}
.theme-sheet img { width: 100%; height: auto; }

/* --------------------------------------------------------------- studio -- */

.studio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-3);
    margin-bottom: var(--sp-5);
}
.pillar {
    padding: var(--sp-3);
    background: var(--ts-surface);
    border: 1px solid var(--ts-line);
    border-radius: var(--radius);
}
.pillar .glyph {
    font-family: var(--font-mono);
    color: var(--ts-accent);
    font-size: 15px;
    letter-spacing: 0.1em;
}
.pillar h3 {
    font-weight: 700;
    font-size: 17px;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    margin: 8px 0;
}
.pillar p {
    margin: 0;
    font-size: 15px;
    color: var(--ts-text-soft);
}

.system-strip {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--sp-2) var(--sp-4);
    padding: var(--sp-3);
    border: 1px solid var(--ts-line);
    border-radius: var(--radius);
    background: var(--ts-surface);
}
.palette {
    display: flex;
    gap: 6px;
}
.palette .chip {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid var(--ts-line);
    position: relative;
}
.palette .chip span {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.05em;
    color: var(--ts-text-soft);
    white-space: nowrap;
}
.system-facts {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-1) var(--sp-3);
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ts-text-soft);
}
.system-facts b { color: var(--ts-accent); font-weight: 700; }

.studio-story {
    margin-top: var(--sp-5);
    font-size: 17px;
    color: var(--ts-text-soft);
    max-width: 68ch;
}
.studio-story .pull {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 20px;
    color: var(--ts-text);
    text-transform: uppercase;
    letter-spacing: 0.02em;
}
.studio-story .pull em { font-style: normal; color: var(--ts-accent); }

/* --------------------------------------------------------------- footer -- */

.site-footer {
    border-top: 1px solid var(--ts-line);
    margin-top: var(--sp-5);
    padding-block: var(--sp-5);
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: var(--sp-4);
}
.footer-brand .wordmark { min-width: 0; }
.footer-brand p {
    margin-top: var(--sp-2);
    font-size: 14px;
    color: var(--ts-text-soft);
    max-width: 36ch;
}
.footer-col h4 {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ts-text-soft);
    margin-bottom: var(--sp-2);
    font-weight: 400;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.footer-col a {
    text-decoration: none;
    font-size: 15px;
    color: var(--ts-text);
}
.footer-col a:hover { color: var(--ts-accent); }
.footer-col .meta {
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.9;
    color: var(--ts-text-soft);
}
.footer-bottom {
    margin-top: var(--sp-4);
    padding-top: var(--sp-3);
    border-top: 1px solid var(--ts-line);
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-1) var(--sp-3);
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--ts-text-soft);
}
.footer-bottom a { text-decoration: underline; text-underline-offset: 3px; }
.footer-bottom a:hover { color: var(--ts-accent); }

/* privacy page */
.prose {
    max-width: 70ch;
}
.prose h1 {
    font-weight: 700;
    font-size: clamp(1.75rem, 3.4vw, 2.375rem);
    text-transform: uppercase;
    letter-spacing: -0.01em;
    margin-bottom: var(--sp-1);
}
.prose h2 {
    font-weight: 500;
    font-size: 19px;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    margin: var(--sp-4) 0 var(--sp-1);
}
.prose p, .prose li { color: var(--ts-text-soft); }
.prose .updated {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--ts-text-soft);
    margin-bottom: var(--sp-4);
}
.prose a { color: var(--ts-accent); }

/* ------------------------------------------------------------- responsive */

@media (max-width: 980px) {
    .hero-inner { grid-template-columns: 1fr; padding-block: var(--sp-5); }
    .hero-icon { order: -1; }
    .hero-icon img { width: clamp(140px, 34vw, 200px); }
    .apps-grid, .studio-grid, .themes-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
    .site-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        margin: 0;
        overflow-x: auto;
        padding: var(--sp-1) var(--sp-3);
        background: var(--ts-bg);
        border-bottom: 1px solid var(--ts-line);
        white-space: nowrap;
        scrollbar-width: none;
    }
    .site-nav::-webkit-scrollbar { display: none; }
    .appearance-label { display: none; }
    .apps-grid, .studio-grid, .themes-grid { grid-template-columns: 1fr; }
    .system-facts { margin-left: 0; }
    .palette { margin-bottom: 20px; }
    .wordmark .name { font-size: 15px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}