/* ==========================================================================
   WuBu — "The Studio" design system
   Shared by index.html, who.html, support.html, privacy.html
   ========================================================================== */

:root {
    --bg: #0a0a0a;
    --card: #16091f;
    --border: rgba(150, 104, 194, 0.18);
    --border-strong: rgba(196, 158, 239, 0.4);
    --c1: #7B3FBF;
    --c2: #9668C2;
    --c3: #C49EEF;
    --c4: #4A1F7A;
    --c5: #5B2D8E;
    --warm: #FFB870;
    --warm-deep: #FF7E50;
    --cream: #f4eede;
    --text: #e6def0;
    --text-soft: #b8b8b8;
    --text-muted: #888;
    --pixel: 'Press Start 2P', cursive;
    --serif: 'Fraunces', Georgia, serif;
    --sans: 'Inter', 'Segoe UI', Tahoma, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
section[id] { scroll-margin-top: 86px; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    line-height: 1.6;
    overflow-x: hidden;
}

/* === AMBIENT FIELD === */
#amb { position: fixed; inset: 0; z-index: 0; opacity: .85; }
.grain {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    opacity: .05;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence baseFrequency='.85' numOctaves='3'/></filter><rect width='140' height='140' filter='url(%23n)'/></svg>");
}
main, header, footer { position: relative; z-index: 2; }

/* === NAV === */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 120;
    border-bottom: 1px solid transparent;
    transition: background .4s, border-color .4s;
}
.nav.solid {
    background: rgba(10, 10, 10, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom-color: var(--border);
}
.nav-inner {
    max-width: 1300px;
    margin: 0 auto;
    padding: 22px 44px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; }
.brand .mark { display: grid; grid-template-columns: repeat(2, 7px); gap: 2px; }
.brand .mark i { width: 7px; height: 7px; background: var(--c3); animation: pulse 3.2s ease-in-out infinite; }
.brand .mark i:nth-child(2) { background: var(--c1); animation-delay: .3s; }
.brand .mark i:nth-child(3) { background: var(--c5); animation-delay: .6s; }
.brand .mark i:nth-child(4) { background: var(--warm); animation-delay: .9s; }
@keyframes pulse { 0%, 100% { opacity: .45 } 50% { opacity: 1 } }
.brand b { font-family: var(--pixel); font-size: 11px; color: var(--text); letter-spacing: 2px; font-weight: 400; }

.nav ul { display: flex; gap: 34px; list-style: none; }
.nav ul a {
    color: var(--text-soft);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    position: relative;
    white-space: nowrap;
}
.nav ul a::after {
    content: '';
    position: absolute;
    left: 0; bottom: -5px;
    width: 0; height: 1px;
    background: var(--c3);
    transition: width .35s cubic-bezier(.2, .8, .2, 1);
}
.nav ul a:hover { color: var(--c3); }
.nav ul a:hover::after { width: 100%; }
.nav ul a.current { color: var(--c3); }
.nav ul a.current::after { width: 100%; background: rgba(196, 158, 239, .4); }

/* === SHARED TYPE === */
.kicker {
    display: flex;
    align-items: center;
    gap: 14px;
    font-family: var(--pixel);
    font-size: 9px;
    letter-spacing: 2.2px;
    color: var(--warm);
    margin-bottom: 34px;
}
.kicker .ln { width: 52px; height: 1px; background: linear-gradient(90deg, var(--warm), transparent); flex: none; }

h1 {
    font-family: var(--serif);
    font-weight: 400;
    font-size: clamp(36px, 6vw, 82px);
    line-height: .98;
    letter-spacing: -2px;
    color: #fff;
}
h1 em { font-style: italic; color: var(--c3); }

.ln-mask { display: block; overflow: hidden; padding-bottom: .06em; }
.ln-mask > span { display: block; transform: translateY(105%); transition: transform 1.05s cubic-bezier(.16, 1, .3, 1); }
.ready .ln-mask > span { transform: none; }
.ln-mask:nth-child(2) > span { transition-delay: .1s; }
.ln-mask:nth-child(3) > span { transition-delay: .2s; }

.sec { max-width: 1300px; margin: 0 auto; padding: 130px 44px; }
.tag { font-family: var(--pixel); font-size: 9px; color: var(--c2); letter-spacing: 2.2px; display: block; }
h2 {
    font-family: var(--serif);
    font-weight: 400;
    font-size: clamp(30px, 4.6vw, 58px);
    color: #fff;
    letter-spacing: -1.4px;
    margin: 16px 0 14px;
    line-height: 1.05;
}
h2 em { font-style: italic; color: var(--c3); }
.lede { color: var(--text-soft); max-width: 580px; font-size: 17px; }

.rev {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity .9s cubic-bezier(.16, 1, .3, 1), transform .9s cubic-bezier(.16, 1, .3, 1);
}
.rev.on { opacity: 1; transform: none; }

/* === INTERIOR PAGES === */
.page-hero {
    max-width: 900px;
    margin: 0 auto;
    padding: 190px 44px 60px;
}
.page-hero h1 { max-width: 16ch; }
.page-hero .lede {
    margin-top: 30px;
    font-size: 18px;
    max-width: 620px;
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 1s .45s, transform 1s .45s;
}
.ready .page-hero .lede { opacity: 1; transform: none; }
.page-hero .stamp {
    margin-top: 26px;
    font-family: var(--pixel);
    font-size: 8px;
    letter-spacing: 2.2px;
    color: var(--text-muted);
}

.prose {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 44px 120px;
}
.prose section { padding-top: 54px; }
.prose section + section { border-top: 1px solid var(--border); margin-top: 20px; }
.prose h2 {
    font-size: clamp(26px, 3.4vw, 40px);
    letter-spacing: -1px;
    margin: 0 0 18px;
}
.prose p { color: var(--text-soft); font-size: 17px; max-width: 660px; }
.prose p + p { margin-top: 16px; }
.prose strong { color: var(--text); font-weight: 600; }
.prose a { color: var(--c3); text-decoration: none; border-bottom: 1px solid rgba(196, 158, 239, .35); }
.prose a:hover { color: #fff; border-bottom-color: #fff; }
.prose ul { list-style: none; margin: 20px 0 0; max-width: 660px; }
.prose li {
    position: relative;
    padding-left: 26px;
    color: var(--text-soft);
    font-size: 17px;
}
.prose li + li { margin-top: 12px; }
.prose li::before {
    content: '';
    position: absolute;
    left: 0; top: .62em;
    width: 7px; height: 7px;
    background: var(--c3);
}

.accent-card {
    margin-top: 24px;
    border-left: 1px solid var(--border-strong);
    padding: 6px 0 6px 28px;
}
.accent-card p {
    font-family: var(--serif);
    font-size: clamp(19px, 2.2vw, 25px);
    line-height: 1.5;
    color: var(--text);
    max-width: 620px;
}
.accent-card em { font-style: italic; color: var(--c3); }

.contact-card {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    margin-top: 26px;
    padding: 18px 26px;
    border: 1px solid var(--border-strong);
    border-radius: 14px;
    background: rgba(22, 9, 31, .5);
    color: var(--c3);
    text-decoration: none;
    font-family: var(--pixel);
    font-size: 11px;
    letter-spacing: 1.6px;
    transition: background .25s, border-color .25s, transform .25s;
}
.contact-card:hover { background: rgba(91, 45, 142, .35); border-color: var(--c3); transform: translateY(-2px); }
.contact-card svg { width: 20px; height: 20px; flex: none; }

/* === FOOTER === */
.foot { border-top: 1px solid var(--border); }
.copyright {
    text-align: center;
    color: var(--text-muted);
    font-size: 10px;
    padding: 46px 22px 44px;
    font-family: var(--pixel);
    letter-spacing: 1.8px;
    line-height: 2.2;
}
.copyright a { color: var(--c2); text-decoration: none; }
.copyright a:hover { color: var(--c3); }

/* === RESPONSIVE === */
@media (max-width: 820px) {
    .nav-inner { padding: 16px 22px; }
    .nav ul { gap: 20px; }
    .nav ul a { font-size: 13px; }
    .nav ul li.opt { display: none; }
    .kicker { align-items: flex-start; line-height: 1.9; }
    .kicker .ln { margin-top: .75em; }
    h1 { letter-spacing: -1.5px; }
    .sec { padding: 90px 22px; }
    .page-hero { padding: 150px 22px 40px; }
    .page-hero h1 { max-width: none; }
    .prose { padding: 20px 22px 90px; }
    .prose section { padding-top: 44px; }
    .copyright { padding: 38px 22px 36px; }
}
@media (max-width: 480px) {
    .brand b { font-size: 10px; }
    .lede, .prose p, .prose li { font-size: 15.5px; }
    .contact-card { font-size: 9px; padding: 16px 20px; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { animation: none !important; transition: none !important; }
    .ln-mask > span { transform: none !important; }
    .rev { opacity: 1 !important; transform: none !important; }
    .page-hero .lede { opacity: 1 !important; transform: none !important; }
}

/* ==========================================================================
   BLOG
   ========================================================================== */

.post-list { max-width: 900px; margin: 0 auto; padding: 30px 44px 120px; }
.post-list .empty { color: var(--text-muted); font-size: 16px; padding-top: 30px; }
.post-list .empty code { font-family: ui-monospace, Menlo, monospace; color: var(--c3); font-size: 13px; }

.post-row {
    display: block;
    text-decoration: none;
    border-top: 1px solid var(--border);
    padding: 40px 0 44px;
    transition: border-color .3s;
}
.post-row:hover { border-top-color: var(--border-strong); }
.post-row .when { font-family: var(--pixel); font-size: 8px; letter-spacing: 1.8px; color: var(--warm); }
.post-row h2 {
    font-size: clamp(25px, 3.2vw, 38px);
    letter-spacing: -1px;
    margin: 14px 0 10px;
    transition: color .3s;
}
.post-row:hover h2 { color: var(--c3); }
.post-row p { color: var(--text-soft); font-size: 16.5px; max-width: 660px; }
.post-row .more {
    display: inline-flex;
    align-items: baseline;
    gap: 14px;
    margin-top: 20px;
    font-family: var(--pixel);
    font-size: 8px;
    letter-spacing: 1.8px;
    color: var(--c3);
}
.post-row .more em { color: var(--text-muted); font-style: normal; }

.kicker .dot { margin: 0 10px; color: var(--text-muted); }

/* --- rendered markdown --- */
.prose h3 {
    font-family: var(--serif);
    font-weight: 400;
    font-size: clamp(21px, 2.4vw, 27px);
    color: #fff;
    letter-spacing: -.4px;
    margin: 36px 0 12px;
}
.prose h4 { font-size: 17px; color: var(--c3); margin: 30px 0 10px; font-weight: 600; }
.prose h2 + p, .prose h3 + p { margin-top: 0; }
.prose blockquote {
    margin: 26px 0;
    padding: 4px 0 4px 26px;
    border-left: 1px solid var(--border-strong);
    font-family: var(--serif);
    font-style: italic;
    font-size: clamp(19px, 2.2vw, 24px);
    line-height: 1.5;
    color: var(--text);
    max-width: 640px;
}
.prose code {
    font-family: ui-monospace, Menlo, monospace;
    font-size: 13.5px;
    color: var(--c3);
    background: rgba(91, 45, 142, .28);
    padding: 2px 6px;
    border-radius: 5px;
}
.prose pre {
    margin: 26px 0;
    padding: 20px 22px;
    background: rgba(12, 6, 20, .8);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow-x: auto;
}
.prose pre code { background: none; padding: 0; color: var(--text-soft); font-size: 13px; line-height: 1.7; }
.prose img { max-width: 100%; border-radius: 12px; margin: 26px 0; border: 1px solid var(--border); }
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 44px 0; }
.prose ol { margin: 20px 0 0 20px; max-width: 660px; color: var(--text-soft); font-size: 17px; }
.prose ol li { padding-left: 6px; }
.prose ol li::before { content: none; }
.prose ol li + li { margin-top: 12px; }

.post-nav {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 44px 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}
.post-nav a {
    display: block;
    text-decoration: none;
    border-top: 1px solid var(--border);
    padding-top: 20px;
    color: var(--text-soft);
    font-family: var(--serif);
    font-size: 19px;
    transition: color .3s, border-color .3s;
}
.post-nav a:hover { color: #fff; border-top-color: var(--border-strong); }
.post-nav a span {
    display: block;
    font-family: var(--pixel);
    font-size: 8px;
    letter-spacing: 1.8px;
    color: var(--warm);
    margin-bottom: 12px;
}
.post-nav .older { grid-column: 2; text-align: right; }

.back {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 44px 110px;
}
.back a {
    font-family: var(--pixel);
    font-size: 9px;
    letter-spacing: 1.8px;
    color: var(--c2);
    text-decoration: none;
}
.back a:hover { color: var(--c3); }

@media (max-width: 820px) {
    .post-list { padding: 20px 22px 90px; }
    .post-row { padding: 32px 0 34px; }
    .post-nav { grid-template-columns: 1fr; padding: 0 22px 30px; }
    .post-nav .older { grid-column: 1; text-align: left; }
    .back { padding: 0 22px 80px; }
}