/* Shared styles for the app case-study pages (weltraum.html, … skaty-watch.html).
   Tokens and device frames match index.html. */

/* ─── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ─── Nothing Design Tokens ─────────────────────────────── */
:root {
    --black:           #000000;
    --surface:         #111111;
    --border:          #222222;
    --border-visible:  #333333;
    --text-disabled:   #666666;
    --text-secondary:  #999999;
    --text-primary:    #E8E8E8;
    --text-display:    #FFFFFF;
    --orange:          #FF6B00;
    --orange-subtle:   rgba(255,107,0,0.15);

    --space-sm:  8px;
    --space-md:  16px;
    --space-lg:  24px;
    --space-xl:  32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;

    --font-body:    'Space Grotesk', 'DM Sans', system-ui, sans-serif;
    --font-mono:    'Space Mono', 'JetBrains Mono', 'SF Mono', monospace;
    --font-display: 'Doto', 'Space Mono', monospace;

    --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
}
[data-theme="light"] {
    --black:           #e8dcc6;
    --surface:         #f0e4d0;
    --border:          #cfc0a6;
    --border-visible:  #bdb094;
    --text-disabled:   #8e8474;
    --text-secondary:  #524a3e;
    --text-primary:    #18160e;
    --text-display:    #080602;
}

body {
    background: var(--black); color: var(--text-primary);
    font-family: var(--font-body); font-size: 16px; line-height: 1.5;
    overflow-x: hidden; -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 var(--space-lg); }

/* ─── Header ────────────────────────────────────────────── */
.site-header { position: sticky; top: 0; z-index: 10; background: var(--black); border-bottom: 1px solid var(--border); padding: var(--space-md) 0; }
.header-row { display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); }
.logo { display: flex; align-items: center; gap: var(--space-sm); }
.logo img { width: 32px; height: 32px; border-radius: 8px; object-fit: cover; object-position: center 38%; }
.logo-name { font-family: var(--font-display); font-size: 18px; letter-spacing: -0.02em; color: var(--text-display); white-space: nowrap; }
.header-controls { display: flex; align-items: center; gap: var(--space-sm); }
.back, .ctrl-btn {
    font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
    color: var(--text-secondary); background: none; cursor: pointer;
    border: 1px solid var(--border-visible); border-radius: 999px; padding: 6px 14px;
    transition: color 200ms var(--ease), border-color 200ms var(--ease);
}
.back:hover, .ctrl-btn:hover { color: var(--text-display); border-color: var(--text-display); }
@media (max-width: 480px) {
    .logo-name { font-size: 15px; }
    .back { display: none; }
}

/* ─── Shared type ───────────────────────────────────────── */
.eyebrow { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--orange); margin-bottom: var(--space-sm); }
.sh { font-family: var(--font-display); font-weight: 400; font-size: clamp(28px, 4vw, 40px); line-height: 1.1; letter-spacing: -0.02em; color: var(--text-display); }
.sh .accent { color: var(--orange); }
.section { padding: var(--space-4xl) 0 0; }
.body-copy { font-size: 17px; line-height: 1.7; color: var(--text-secondary); }
.dot-divider {
    height: 5px; max-width: 1100px; margin: var(--space-4xl) auto 0;
    background-image: radial-gradient(circle at center, var(--border-visible) 1px, transparent 1.6px);
    background-size: 14px 5px; background-repeat: repeat-x; opacity: 0.55;
}

/* ─── Hero ──────────────────────────────────────────────── */
.hero { position: relative; padding: var(--space-4xl) 0 var(--space-2xl); }
.hero::before {
    content: ''; position: absolute; inset: 0; z-index: -1;
    background-image: radial-gradient(circle, var(--border) 0.5px, transparent 0.5px);
    background-size: 12px 12px; opacity: 0.4;
}
.hero-title { font-family: var(--font-display); font-weight: 400; font-size: clamp(52px, 9vw, 104px); line-height: 1; letter-spacing: -0.03em; color: var(--text-display); margin-bottom: var(--space-lg); }
.hero-sub { font-size: clamp(18px, 2vw, 22px); line-height: 1.5; max-width: 680px; margin-bottom: var(--space-xl); }
.badge-row { display: flex; flex-wrap: wrap; gap: 10px; }
.badge-row img { height: 44px; width: auto; transition: opacity 200ms var(--ease); }
.badge-row img:hover { opacity: 0.7; }
.facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-md); margin-top: var(--space-2xl); }
.fact { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: var(--space-lg); display: flex; flex-direction: column-reverse; gap: var(--space-sm); }
.fact dt { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-secondary); }
.fact dd { font-family: var(--font-display); font-size: 26px; line-height: 1.15; color: var(--text-display); }
@media (max-width: 800px) { .facts { grid-template-columns: repeat(2, 1fr); gap: var(--space-sm); } .fact dd { font-size: 22px; } }
@media (max-width: 480px) { .fact { padding: var(--space-md); } .fact dd { font-size: 17px; } }

/* ─── Gameplay stage with a CSS device frame ────────────── */
.stage {
    position: relative; margin-top: var(--space-2xl);
    background: var(--surface); border: 1px solid var(--border); border-radius: 24px;
    padding: clamp(40px, 6vw, 80px) var(--space-lg);
    display: flex; justify-content: center; overflow: hidden;
}
.stage::before {
    content: ''; position: absolute; inset: 0;
    background-image: radial-gradient(circle, var(--border-visible) 0.6px, transparent 0.6px);
    background-size: 12px 12px; opacity: 0.6;
}
.device { position: relative; display: inline-flex; flex: none; }
.device video { display: block; object-fit: cover; background: #000; }

/* Every measurement derives from --u, the screen's short side */
.phone {
    --u: min(200px, 44vw);
    padding: calc(var(--u) * 0.048); border-radius: calc(var(--u) * 0.23);
    background: #050505;
    box-shadow: 0 0 0 calc(var(--u) * 0.016) #8e8e93, 0 0 0 calc(var(--u) * 0.028) #3a3a3c,
                0 calc(var(--u) * 0.12) calc(var(--u) * 0.3) calc(var(--u) * -0.08) rgba(0, 0, 0, 0.6);
}
.phone video { width: var(--u); aspect-ratio: 1170 / 2532; border-radius: calc(var(--u) * 0.184); }
.phone .island {
    position: absolute; left: 50%; top: calc(var(--u) * 0.076); transform: translateX(-50%);
    width: calc(var(--u) * 0.32); height: calc(var(--u) * 0.093); border-radius: 999px; background: #000;
}
.phone.landscape { --u: min(360px, 38vw); }
.phone.landscape video { width: auto; height: var(--u); aspect-ratio: 2532 / 1170; }
.phone.landscape .island {
    left: calc(var(--u) * 0.076); top: 50%; transform: translateY(-50%);
    width: calc(var(--u) * 0.093); height: calc(var(--u) * 0.32);
}
.watch {
    --u: min(210px, 52vw);
    padding: calc(var(--u) * 0.06); border-radius: calc(var(--u) * 0.3);
    background: #050505;
    box-shadow: 0 0 0 calc(var(--u) * 0.022) #2c2c2e, 0 0 0 calc(var(--u) * 0.032) #58585d,
                0 calc(var(--u) * 0.1) calc(var(--u) * 0.26) calc(var(--u) * -0.06) rgba(0, 0, 0, 0.6);
    margin: calc(var(--u) * 0.24) 0;
}
.watch video { width: var(--u); aspect-ratio: 368 / 448; border-radius: calc(var(--u) * 0.24); }
.watch .band {
    position: absolute; left: 50%; z-index: -1;
    width: calc(var(--u) * 0.74); height: calc(var(--u) * 0.5); transform: translateX(-50%);
    background: linear-gradient(90deg, #17181c, #25262c 50%, #17181c);
}
.watch .band.top    { top: calc(var(--u) * -0.24);    border-radius: calc(var(--u) * 0.1) calc(var(--u) * 0.1) 0 0; }
.watch .band.bottom { bottom: calc(var(--u) * -0.24); border-radius: 0 0 calc(var(--u) * 0.1) calc(var(--u) * 0.1); }
.watch .crown {
    position: absolute; right: calc(var(--u) * -0.085); top: calc(var(--u) * 0.3);
    width: calc(var(--u) * 0.08); height: calc(var(--u) * 0.22); border-radius: calc(var(--u) * 0.03);
    background: repeating-linear-gradient(0deg, #a1a1a6 0 1px, #5d5d62 1px 2px);
}
figcaption { margin-top: var(--space-md); font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; color: var(--text-disabled); }

/* ─── The idea: heading + body, then three cards ────────── */
.split { display: grid; grid-template-columns: 1fr 1.2fr; gap: var(--space-2xl); align-items: end; margin-bottom: var(--space-2xl); }
@media (max-width: 800px) { .split { grid-template-columns: 1fr; gap: var(--space-lg); } }
.cards { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }
@media (max-width: 900px) { .cards { grid-template-columns: 1fr; } }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: var(--space-lg); display: flex; flex-direction: column; gap: var(--space-lg); }
.c-k { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; color: var(--orange); }
.c-t { font-family: var(--font-display); font-weight: 400; font-size: 22px; line-height: 1.2; color: var(--text-display); margin: 6px 0; }
.c-d { font-size: 15px; line-height: 1.55; color: var(--text-secondary); }

/* Gesture diagrams (Up Dino Up) */
.pad {
    height: 170px; border: 1px solid var(--border); border-radius: 12px; overflow: hidden;
    display: flex; align-items: center; justify-content: center; gap: var(--space-sm);
    font-family: var(--font-mono); font-size: 12px; color: var(--orange);
    background-image: radial-gradient(circle, var(--border) 0.6px, transparent 0.6px); background-size: 12px 12px;
}
.pad-half { flex: 1; align-self: stretch; display: flex; align-items: center; justify-content: center; }
.pad-half.on { background: var(--orange-subtle); border-right: 1px dashed var(--orange); }
.pad-half.off { color: var(--text-disabled); }
.pad-swipe { flex-direction: column; }
.pad-swipe i { width: 4px; height: 56px; border-radius: 2px; background: var(--orange); }
.pad-walls { justify-content: space-between; padding: 0 28px; }
.pad-walls i { width: 14px; height: 120px; border-radius: 3px; background: var(--border-visible); }

/* ─── Screenshot strip ──────────────────────────────────── */
.gallery-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: var(--space-md); margin-bottom: var(--space-xl); }
.gallery-hint { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; color: var(--text-disabled); }
.gallery {
    list-style: none; display: flex; gap: var(--space-md);
    overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: thin;
    padding-bottom: var(--space-md);
}
.gallery li { flex: none; scroll-snap-align: start; }
.gallery img {
    height: 460px; width: auto; border-radius: 18px;
    border: 1px solid var(--border); background: var(--surface);
}
.gallery.watch-shots img { height: 300px; border-radius: 34%/28%; }
.gallery.wide-shots img { height: 300px; }
@media (max-width: 600px) {
    .gallery img { height: 380px; }
    .gallery.watch-shots img { height: 240px; }
    .gallery.wide-shots img { height: 180px; }
}

/* ─── Numbers ───────────────────────────────────────────── */
.tiles { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-md); }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: var(--space-lg); }
.tile b { display: block; font-family: var(--font-display); font-weight: 400; font-size: 44px; line-height: 1.1; color: var(--text-display); }
.tile span { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-secondary); }

/* ─── Prev / next ───────────────────────────────────────── */
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-md); padding: var(--space-4xl) 0; }
@media (max-width: 600px) { .pager { grid-template-columns: 1fr; } }
.pager a {
    border: 1px solid var(--border); border-radius: 16px; padding: var(--space-lg);
    display: flex; flex-direction: column; gap: var(--space-sm);
    transition: border-color 200ms var(--ease);
}
.pager a:hover { border-color: var(--text-display); }
.pager a.next { align-items: flex-end; text-align: right; }
.pager small { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; color: var(--text-disabled); }
.pager strong { font-family: var(--font-display); font-weight: 400; font-size: 26px; color: var(--text-display); }

.site-footer { border-top: 1px solid var(--border); padding: var(--space-lg) 0; }
.footer-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-md); font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em; color: var(--text-disabled); }
.footer-row a:hover { color: var(--text-display); }