/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   DSLab · 夢想空間實驗室
   Sumi Ink + Vermilion palette
   Anti-slop discipline: no Fraunces, no amber, no AI-default tells
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

:root {
    /* 色板：紙、墨、朱印 */
    --paper: #F4F1E8;
    --paper-warm: #ECE6D5;
    --paper-warmer: #E3DCC7;
    --ink: #0B0D0E;
    --ink-dim: #4A4D4F;
    --ink-fade: #8a8a86;
    --ink-faint: #c2bfb6;
    --vermilion: #D63B27;
    --vermilion-deep: #A92B1B;
    --rule: rgba(11, 13, 14, 0.10);
    --rule-strong: rgba(11, 13, 14, 0.20);

    /* 字 */
    --sans: 'Inter Tight', 'Noto Sans TC', system-ui, sans-serif;
    --mono: 'IBM Plex Mono', 'JetBrains Mono', ui-monospace, monospace;

    /* 排版 */
    --max-w: 1600px;
    --pad-x: clamp(1.5rem, 6vw, 6rem);
    --section-gap: clamp(5rem, 9vw, 8.5rem);
}

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

html {
    scroll-behavior: smooth;
    background: var(--paper);
}

body {
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    font-weight: 300;
    line-height: 1.7;
    min-height: 100dvh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* 紙質紋理：淡淡 SVG noise — 只在 fixed pseudo，不影響滾動 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 60;
    opacity: 0.25;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.92' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/></svg>");
    mix-blend-mode: multiply;
}

::selection {
    background: var(--vermilion);
    color: var(--paper);
}

a {
    color: inherit;
    text-decoration: none;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
/* NAV — single line 64px              */
/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.site-nav {
    position: sticky;
    top: 0;
    z-index: 50;
    height: 64px;
    background: rgba(244, 241, 232, 0.92);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--rule);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--pad-x);
}

.brand {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
}

.brand-mark {
    font-family: var(--sans);
    font-weight: 800;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
    color: var(--ink);
}

.brand-sub {
    font-family: var(--sans);
    font-weight: 400;
    font-size: 0.78rem;
    color: var(--ink-fade);
    letter-spacing: 0.04em;
}

.primary-nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-family: var(--sans);
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--ink-dim);
    letter-spacing: 0.04em;
    padding: 0.4rem 0;
    border-bottom: 1px solid transparent;
    transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.nav-link:hover {
    color: var(--ink);
}

.nav-link.active {
    color: var(--ink);
    border-bottom-color: var(--vermilion);
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
/* ① HERO — asymmetric                 */
/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.hero {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: clamp(2rem, 4vw, 3.5rem) var(--pad-x) clamp(3rem, 5vw, 4rem);
    display: grid;
    grid-template-columns: minmax(320px, 6fr) 7fr;
    gap: clamp(2rem, 5vw, 5rem);
    align-items: center;
    min-height: calc(100dvh - 64px);
}

.hero-visual {
    position: relative;
}

.hero-visual img {
    width: 100%;
    height: auto;
    max-height: 72dvh;
    object-fit: cover;
    display: block;
    border-radius: 2px;
    box-shadow:
        0 40px 80px -25px rgba(11, 13, 14, 0.22),
        0 0 0 1px var(--rule);
}

.hero-caption {
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--ink-fade);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-top: 1rem;
    text-align: right;
}

.hero-text {
    max-width: 640px;
}

.hero-name {
    font-family: 'Noto Sans TC', var(--sans);
    font-weight: 900;
    font-size: clamp(5rem, 13vw, 12rem);
    line-height: 0.88;
    letter-spacing: -0.05em;
    color: var(--ink);
    margin-bottom: 1.8rem;
}

.hero-role {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.85rem;
    font-family: var(--sans);
    font-size: clamp(0.95rem, 1.2vw, 1.1rem);
    font-weight: 400;
    color: var(--ink-dim);
    letter-spacing: 0.02em;
    margin-bottom: 2.2rem;
}

.role-en {
    font-family: var(--sans);
    font-weight: 700;
    color: var(--ink);
    letter-spacing: -0.01em;
}

.role-sep {
    display: inline-block;
    width: 1px;
    height: 0.95em;
    background: var(--ink-faint);
    transform: translateY(0.1em);
}

.role-zh {
    font-family: 'Noto Sans TC', var(--sans);
    font-weight: 500;
    color: var(--ink);
}

.role-zh em {
    font-style: normal;
    font-weight: 700;
    color: var(--ink);
    position: relative;
    padding-bottom: 0.15em;
}

.role-zh em::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -0.1em;
    height: 3px;
    background: var(--vermilion);
}

.hero-tagline {
    font-family: 'Noto Sans TC', var(--sans);
    font-size: clamp(1.05rem, 1.4vw, 1.3rem);
    font-weight: 400;
    line-height: 1.7;
    color: var(--ink-dim);
    margin-bottom: 2.8rem;
    max-width: 32ch;
}

.hero-cta {
    display: inline-flex;
    align-items: baseline;
    gap: 0.6rem;
    font-family: var(--sans);
    font-size: 1rem;
    font-weight: 500;
    color: var(--ink);
    border-bottom: 1px solid var(--ink);
    padding: 0.3rem 0;
    transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.cta-arrow {
    display: inline-block;
    transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.hero-cta:hover {
    color: var(--vermilion);
    border-bottom-color: var(--vermilion);
}

.hero-cta:hover .cta-arrow {
    transform: translateX(0.3rem);
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
/* ② 成就帶                            */
/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.achievements {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 var(--pad-x);
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0;
    border-top: 1px solid var(--rule-strong);
    border-bottom: 1px solid var(--rule-strong);
}

.ach {
    padding: 2.5rem 1.5rem;
    border-right: 1px solid var(--rule);
    text-align: left;
}

.ach:last-child {
    border-right: none;
}

.ach-num {
    font-family: var(--mono);
    font-weight: 400;
    font-size: clamp(1.5rem, 2.2vw, 2.1rem);
    letter-spacing: -0.02em;
    color: var(--ink);
    line-height: 1;
    margin-bottom: 0.7rem;
}

.ach-label {
    font-family: 'Noto Sans TC', var(--sans);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--ink-dim);
    letter-spacing: 0.04em;
    margin-bottom: 0.3rem;
}

.ach-meta {
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--ink-fade);
    letter-spacing: 0.08em;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
/* Section head — shared              */
/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.section-head {
    max-width: 880px;
    margin-bottom: 4rem;
}

.section-head h2 {
    font-family: 'Noto Sans TC', var(--sans);
    font-weight: 700;
    font-size: clamp(2rem, 4vw, 3.2rem);
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin-bottom: 0.8rem;
}

.head-side {
    font-family: 'Noto Sans TC', var(--sans);
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--ink-fade);
    letter-spacing: 0.02em;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
/* ③ Services — editorial list 01-05  */
/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.services {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: var(--section-gap) var(--pad-x);
}

.services-list {
    list-style: none;
    counter-reset: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.services-list li {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 1.5rem;
    padding: 2.2rem 2.2rem 2.2rem 2rem;
    background: var(--paper-warm);
    border: 1px solid var(--rule);
    border-radius: 2px;
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.services-list li::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: var(--vermilion);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.services-list li:hover {
    background: var(--paper-warmer);
    transform: translateY(-2px);
}

.services-list li:hover::before {
    transform: scaleY(1);
}

/* 第 5 條跨整行 */
.services-list li:nth-child(5) {
    grid-column: span 2;
}

.serv-num {
    font-family: var(--mono);
    font-weight: 400;
    font-size: clamp(1.8rem, 2.4vw, 2.2rem);
    color: var(--vermilion);
    letter-spacing: 0;
    line-height: 1;
    padding-top: 0.15em;
}

.serv-body h3 {
    font-family: 'Noto Sans TC', var(--sans);
    font-weight: 700;
    font-size: clamp(1.25rem, 1.7vw, 1.55rem);
    color: var(--ink);
    line-height: 1.25;
    letter-spacing: -0.01em;
    margin-bottom: 0.7rem;
}

.serv-body p {
    font-family: 'Noto Sans TC', var(--sans);
    font-size: 0.96rem;
    font-weight: 400;
    line-height: 1.75;
    color: var(--ink-dim);
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
/* ④ Origin story — prose             */
/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.origin {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: var(--section-gap) var(--pad-x);
    border-top: 1px solid var(--rule-strong);
}

.origin-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2.5rem, 5vw, 5rem);
    margin: 3.5rem 0;
}

.origin-col {
    border-top: 1px solid var(--rule);
    padding-top: 2rem;
}

.origin-col:first-child {
    border-top-color: var(--ink);
}

.origin-col-title {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--rule);
}

.col-num {
    font-family: 'Noto Sans TC', var(--sans);
    font-weight: 800;
    font-size: clamp(1.5rem, 2vw, 1.85rem);
    color: var(--ink);
    letter-spacing: -0.01em;
}

.col-period {
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--vermilion);
    letter-spacing: 0.15em;
}

.origin-col p {
    font-family: 'Noto Sans TC', var(--sans);
    font-size: clamp(1rem, 1.1vw, 1.1rem);
    font-weight: 400;
    line-height: 2;
    color: var(--ink-dim);
    margin-bottom: 1.8rem;
}

.origin-col p strong {
    color: var(--ink);
    font-weight: 700;
    border-bottom: 1px dashed var(--vermilion);
    padding-bottom: 1px;
}

.origin-col p em {
    font-style: normal;
    color: var(--ink);
    font-weight: 700;
    background: linear-gradient(180deg, transparent 65%, rgba(214, 59, 39, 0.18) 65%);
    padding: 0 0.2em;
}

.origin-body p strong {
    color: var(--ink);
    font-weight: 700;
    border-bottom: 1px dashed var(--vermilion);
    padding-bottom: 1px;
}

.origin-body p em {
    font-style: normal;
    color: var(--ink);
    font-weight: 700;
    background: linear-gradient(180deg, transparent 65%, rgba(214, 59, 39, 0.18) 65%);
    padding: 0 0.2em;
}

.origin-quote {
    font-family: 'Noto Sans TC', var(--sans);
    font-weight: 700;
    font-size: clamp(2rem, 4vw, 3.6rem);
    line-height: 1.32;
    color: var(--ink);
    letter-spacing: -0.018em;
    padding: 2rem 0 2rem 2.2rem;
    margin: 1rem 0 0;
    border-left: 4px solid var(--vermilion);
    max-width: none;
    text-align: left;
}

.origin-closing {
    font-family: 'Noto Sans TC', var(--sans);
    color: var(--ink);
    font-weight: 500;
    font-size: clamp(1.2rem, 1.5vw, 1.45rem);
    line-height: 1.85;
    padding-top: 2.5rem;
    border-top: 1px solid var(--rule);
    max-width: none;
    margin: 0;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
/* ⑤ Projects preview — asymmetric grid */
/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.projects-preview {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: var(--section-gap) var(--pad-x);
    border-top: 1px solid var(--rule-strong);
}

.lab-banner {
    margin: 0 0 4rem;
    aspect-ratio: 16 / 6.67;
    overflow: hidden;
    border-radius: 2px;
    box-shadow: 0 30px 60px -25px rgba(11, 13, 14, 0.18);
}

.lab-banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.projects-preview:hover .lab-banner img {
    transform: scale(1.03);
}

.projects-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    grid-template-rows: 1fr;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.project-tile {
    background: var(--paper-warm);
    border: 1px solid var(--rule);
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 400px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    position: relative;
    color: var(--ink);
}

.project-tile::before {
    content: '';
    position: absolute;
    top: 1.2rem;
    right: 1.2rem;
    width: 8px;
    height: 8px;
    background: var(--ink-faint);
    border-radius: 50%;
    transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
    z-index: 2;
}

.project-tile:hover {
    transform: translateY(-4px);
}

.project-tile:hover::before {
    background: var(--vermilion);
}

.tile-photo {
    flex: 0 0 55%;
    overflow: hidden;
    background: var(--paper-warmer);
}

.tile-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.project-tile:hover .tile-photo img {
    transform: scale(1.04);
}

.tile-body {
    padding: 1.6rem 1.6rem 1.8rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    flex: 1;
}

.tile-large {
    background: var(--ink);
    color: var(--paper);
}

.tile-large::before {
    background: var(--vermilion);
}

.tile-game .tile-photo {
    background: linear-gradient(180deg, #1a1814, #0b0d0e);
}

.tile-game .tile-photo img {
    object-fit: contain;
    padding: 1rem;
}

.tile-cat {
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--ink-fade);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    display: block;
}

.tile-large .tile-cat {
    color: var(--paper-warm);
}

.tile-body h3 {
    font-family: 'Noto Sans TC', var(--sans);
    font-weight: 700;
    font-size: clamp(1.2rem, 1.6vw, 1.55rem);
    color: var(--ink);
    line-height: 1.25;
    letter-spacing: -0.01em;
}

.tile-large .tile-body h3 {
    color: var(--paper);
}

.tile-body p {
    font-family: 'Noto Sans TC', var(--sans);
    font-size: 0.88rem;
    color: var(--ink-dim);
    line-height: 1.6;
}

.tile-large .tile-body p {
    color: var(--paper-warm);
}

.projects-more {
    display: inline-flex;
    align-items: baseline;
    gap: 0.6rem;
    font-family: var(--sans);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--ink);
    border-bottom: 1px solid var(--ink);
    padding: 0.25rem 0;
    transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.projects-more:hover {
    color: var(--vermilion);
    border-bottom-color: var(--vermilion);
}

.projects-more:hover .cta-arrow {
    transform: translateX(0.3rem);
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
/* FOOTER                              */
/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.site-footer {
    background: var(--ink);
    color: var(--paper);
    padding: var(--section-gap) var(--pad-x) 3rem;
    margin-top: var(--section-gap);
}

.footer-grid {
    max-width: var(--max-w);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: clamp(2rem, 5vw, 5rem);
    padding-bottom: 4rem;
    border-bottom: 1px solid rgba(244, 241, 232, 0.12);
}

.foot-mark {
    font-family: var(--sans);
    font-weight: 800;
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    letter-spacing: -0.03em;
    color: var(--paper);
    line-height: 1;
    margin-bottom: 1rem;
}

.foot-sub {
    font-family: var(--sans);
    font-size: 0.85rem;
    color: rgba(244, 241, 232, 0.7);
    letter-spacing: 0.04em;
    margin-bottom: 0.4rem;
}

.foot-tagline {
    font-family: 'Noto Sans TC', var(--sans);
    font-size: 0.85rem;
    color: rgba(244, 241, 232, 0.5);
    letter-spacing: 0.02em;
}

.foot-eyebrow {
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--vermilion);
    letter-spacing: 0.25em;
    text-transform: uppercase;
    margin-bottom: 1.8rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid rgba(244, 241, 232, 0.15);
}

.foot-link {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 1.1rem 0;
    border-bottom: 1px solid rgba(244, 241, 232, 0.08);
    transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
    color: var(--paper);
}

.foot-link:last-child {
    border-bottom: none;
}

.foot-link span:first-child {
    font-family: var(--sans);
    font-weight: 500;
    font-size: 1.05rem;
    letter-spacing: 0.01em;
}

.foot-link span:last-child {
    font-family: var(--mono);
    font-size: 0.82rem;
    color: rgba(244, 241, 232, 0.5);
    letter-spacing: 0.04em;
}

.foot-link:hover {
    padding-left: 1rem;
}

.foot-link:hover span:first-child {
    color: var(--vermilion);
}

.foot-link-primary span:first-child {
    color: var(--vermilion);
}

.footer-line {
    max-width: var(--max-w);
    margin: 0 auto;
    padding-top: 3rem;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-line p {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: rgba(244, 241, 232, 0.45);
    letter-spacing: 0.08em;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
/* Responsive                          */
/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
@media (max-width: 960px) {
    .hero {
        grid-template-columns: 1fr;
        gap: 3rem;
        min-height: auto;
    }

    .hero-visual {
        max-width: 480px;
        margin: 0 auto;
    }

    .hero-text {
        max-width: 100%;
    }

    .origin-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .achievements {
        grid-template-columns: repeat(2, 1fr);
    }

    .ach {
        border-right: none;
        border-bottom: 1px solid var(--rule);
    }

    .ach:nth-child(odd) {
        border-right: 1px solid var(--rule);
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-line {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 640px) {
    .brand-sub {
        display: none;
    }

    .primary-nav {
        gap: 1.2rem;
    }

    .achievements {
        grid-template-columns: 1fr;
    }

    .ach {
        border-right: none !important;
        border-bottom: 1px solid var(--rule);
        padding: 1.8rem 0;
    }

    .ach:last-child {
        border-bottom: none;
    }

    .services-list {
        grid-template-columns: 1fr;
    }

    .services-list li {
        grid-template-columns: 60px 1fr;
        gap: 1rem;
        padding: 1.6rem 1.4rem;
    }

    .services-list li:nth-child(5) {
        grid-column: span 1;
    }

    .origin-quote {
        padding: 1.5rem 0 1.5rem 1.2rem;
        margin: 2rem 0;
    }
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
/* Reduced motion                      */
/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}