/* =========================================================
   김찬혁 Portfolio — style.css
   ========================================================= */

:root {
  --bg: #ffffff;
  --bg-soft: #f5f7fc;
  --surface: #ffffff;
  --text: #10131f;
  --text-muted: #5b6178;
  --border: #e7e9f2;
  --accent: #3457ff;
  --accent-dark: #1b2a80;
  --accent-soft: #eef1ff;
  --success: #16a34a;
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(16,19,31,.05), 0 1px 1px rgba(16,19,31,.04);
  --shadow-md: 0 18px 40px -16px rgba(16,19,31,.18);
  --font: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Malgun Gothic', 'Apple SD Gothic Neo', system-ui, Roboto, sans-serif;
  --header-h: 72px;
  --ease: cubic-bezier(.4,0,.2,1);
}

[data-theme="dark"] {
  --bg: #0a0d1a;
  --bg-soft: #0d1120;
  --surface: #121628;
  --text: #eef0fa;
  --text-muted: #9aa0bd;
  --border: #232a45;
  --accent: #7d93ff;
  --accent-dark: #c7d1ff;
  --accent-soft: rgba(125,147,255,.12);
  --success: #34d399;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --shadow-md: 0 20px 45px -18px rgba(0,0,0,.65);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background-color .35s var(--ease), color .35s var(--ease);
  overflow-x: hidden;
  word-break: keep-all;
  overflow-wrap: break-word;
}

body.nav-open,
body.dialog-open { overflow: hidden; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; cursor: pointer; background: none; border: none; color: inherit; }

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 12px 18px;
  border-radius: 0 0 8px 0;
  z-index: 999;
}
.skip-link:focus { left: 0; }

/* ---------- Nav ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 100;
  display: flex;
  align-items: center;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background-color .3s var(--ease);
}
.nav.scrolled { border-bottom-color: var(--border); }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -.02em;
}
.logo span { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 2.1rem;
}
.nav-links a {
  font-size: .93rem;
  font-weight: 600;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
  transition: color .2s var(--ease);
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--accent); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.nav-actions { display: flex; align-items: center; gap: .5rem; }

.icon-btn {
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  color: var(--text);
  transition: background-color .2s var(--ease);
}
.icon-btn:hover { background: var(--accent-soft); }

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.nav-toggle span {
  width: 20px; height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .85rem 1.5rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: .95rem;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background-color .2s var(--ease), color .2s var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover { transform: translateY(-2px); }
.btn-outline {
  border: 1.5px solid var(--border);
  color: var(--text);
  background: var(--surface);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
[data-theme="dark"] .btn-outline { border-color: #3a4262; }
.btn-lg { padding: 1.05rem 2.1rem; font-size: 1.05rem; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: calc(var(--header-h) + 40px) 0 100px;
  overflow: hidden;
}

.hero-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: .35;
  animation: float 16s ease-in-out infinite;
}
.blob-1 { width: 420px; height: 420px; background: var(--accent); top: -120px; right: -80px; }
.blob-2 { width: 320px; height: 320px; background: #16d3c9; left: -100px; top: 30%; animation-delay: -4s; }
.blob-3 { width: 300px; height: 300px; background: #a855f7; right: 10%; bottom: -140px; animation-delay: -9s; }
[data-theme="dark"] .blob { opacity: .22; }

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-30px, 40px) scale(1.08); }
}

.hero-inner { position: relative; z-index: 1; max-width: 780px; text-align: center; margin: 0 auto; padding: 0 24px; }

.eyebrow {
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero-title {
  font-size: clamp(1.9rem, 5.2vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.28;
  margin-bottom: 1.4rem;
}
.text-accent { color: var(--accent); }

.hero-sub {
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto 2.2rem;
}

.hero-cta { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.8rem; }

.hero-links { display: flex; justify-content: center; gap: .7rem; margin-bottom: 3rem; }
.social-link {
  width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: all .2s var(--ease);
}
.social-link:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-3px); }

.hero-stats {
  display: flex;
  justify-content: center;
  gap: clamp(1.8rem, 5vw, 3.5rem);
}
.hero-stats > div { text-align: center; }
.hero-stats dt { font-size: 1.7rem; font-weight: 800; color: var(--text); }
.hero-stats dd { font-size: .82rem; color: var(--text-muted); margin-top: 2px; }

.scroll-cue {
  position: absolute;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  color: var(--text-muted);
  animation: bounce 2.2s ease-in-out infinite;
  z-index: 1;
}
@keyframes bounce {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 8px); }
}

/* ---------- Sections ---------- */
.section { padding: 110px 0; }
.section-alt { background: var(--bg-soft); }

.section-title {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: 3rem;
}

.sub-heading {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 3.5rem 0 1.5rem;
  color: var(--text-muted);
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 3.5rem;
  align-items: start;
}

.about-avatar { text-align: center; }
.avatar-circle {
  width: 160px; height: 160px;
  border-radius: 50%;
  margin: 0 auto 1rem;
  display: flex; align-items: center; justify-content: center;
  font-size: 3.2rem;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.avatar-circle img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center 15%;
  display: block;
}
.avatar-caption { font-size: .85rem; color: var(--text-muted); line-height: 1.5; }

.about-quote {
  font-size: 1.08rem;
  line-height: 1.9;
  color: var(--text);
  padding: 1.8rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-md);
  margin-bottom: 1.8rem;
}

.info-list { display: flex; flex-direction: column; gap: .7rem; }
.info-list li { display: flex; align-items: center; gap: .6rem; font-size: .95rem; color: var(--text-muted); }
.info-list a:hover { color: var(--accent); }
.info-icon { font-size: 1rem; }

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
  align-items: start;
}
.skill-card {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.6rem;
}
.skill-title {
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.1rem;
}
.chip-list { display: flex; flex-wrap: wrap; gap: .55rem; }
.chip {
  display: inline-flex;
  max-width: 100%;
  align-items: center;
  gap: .4rem;
  padding: .4rem .75rem;
  border-radius: 999px;
  background: var(--accent-soft);
  font-size: .82rem;
  font-weight: 600;
  color: var(--text);
}
.chip > span { min-width: 0; overflow-wrap: anywhere; }
.chip-icon { width: 15px; height: 15px; flex-shrink: 0; object-fit: contain; }
.chip-icon-wide { width: 22px; }
.chip-icon-symbol {
  display: inline-grid;
  place-items: center;
  flex: 0 0 15px;
  font-size: .9rem;
  line-height: 1;
}
[data-theme="dark"] .chip-icon-monochrome { filter: invert(1); }

/* ---------- Timeline ---------- */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before {
  content: "";
  position: absolute;
  left: 5px; top: 6px; bottom: 6px;
  width: 2px;
  background: var(--border);
}
.timeline-item { position: relative; padding-bottom: 3rem; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot {
  position: absolute;
  left: -2rem; top: 6px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.timeline-period { font-size: .82rem; font-weight: 700; color: var(--accent); margin-bottom: .3rem; }
.timeline-title { font-size: 1.2rem; font-weight: 800; margin-bottom: .8rem; }
.timeline-list { display: flex; flex-direction: column; gap: .45rem; }
.timeline-list li {
  font-size: .94rem;
  color: var(--text-muted);
  padding-left: 1.1rem;
  position: relative;
}
.timeline-list li::before {
  content: "";
  position: absolute;
  left: 0; top: .6em;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--text-muted);
}
.callout {
  margin-top: 1rem;
  padding: 1rem 1.2rem;
  background: var(--accent-soft);
  border-radius: var(--radius-sm);
  font-size: .88rem;
  color: var(--text);
  line-height: 1.7;
}

/* ---------- Projects ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.4rem;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
  display: flex;
  flex-direction: column;
}
.project-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

.card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; margin-bottom: .9rem; }
.card-period { font-size: .78rem; font-weight: 700; color: var(--text-muted); margin-bottom: .35rem; }
.card-title { font-size: 1.12rem; font-weight: 800; line-height: 1.4; }
.card-title-icon {
  width: 26px; height: 26px;
  border-radius: 8px;
  object-fit: cover;
  vertical-align: -6px;
  margin-right: .4rem;
}
.card-link {
  flex-shrink: 0;
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: all .2s var(--ease);
}
.card-link:hover { color: var(--accent); border-color: var(--accent); }

.badge-row { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: .9rem; }
.badge {
  font-size: .74rem;
  font-weight: 700;
  padding: .3rem .65rem;
  border-radius: 999px;
}
.badge-award { background: rgba(234,179,8,.15); color: #b45309; }
[data-theme="dark"] .badge-award { color: #fbbf24; }
.badge-event { background: rgba(52,87,255,.1); color: var(--accent); }

.card-desc { display: flex; flex-direction: column; gap: .5rem; margin-bottom: 1.2rem; flex-grow: 1; }
.card-desc li {
  font-size: .89rem;
  color: var(--text-muted);
  padding-left: 1.1rem;
  position: relative;
  line-height: 1.6;
}
.card-desc li::before {
  content: "";
  position: absolute;
  left: 0; top: .65em;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.usage-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .4rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: .85rem .5rem;
  margin-bottom: .6rem;
}
[data-theme="dark"] .usage-stats { background: var(--surface); }
.usage-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: .15rem;
  padding: 0 .2rem;
  position: relative;
}
.usage-stat:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -.2rem; top: 10%;
  height: 80%;
  width: 1px;
  background: var(--border);
}
.usage-num { font-size: 1.05rem; font-weight: 800; color: var(--accent); }
.usage-num em { font-size: .68rem; font-weight: 700; font-style: normal; margin-left: 1px; }
.usage-label { font-size: .66rem; color: var(--text-muted); font-weight: 600; white-space: nowrap; }
.usage-caption { font-size: .72rem; color: var(--text-muted); margin-bottom: 1rem; text-align: right; }

.card-tech { display: flex; flex-wrap: wrap; gap: .45rem; }
.tech-tag {
  font-size: .76rem;
  font-weight: 600;
  padding: .28rem .6rem;
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text-muted);
}
[data-theme="dark"] .tech-tag { background: var(--surface); }

.card-more {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  margin-top: 1rem;
  font-size: .82rem;
  font-weight: 700;
  color: var(--accent);
  align-self: flex-start;
}
.card-more:hover { text-decoration: underline; }
.card-more-icon { transition: transform .25s var(--ease); }
.card-more-dialog .card-more-icon { transform: rotate(-90deg); }

/* ---------- Project case study dialogs ---------- */
.project-dialog {
  inset: 0;
  margin: auto;
  width: min(1120px, calc(100% - 32px));
  max-width: 1120px;
  max-height: 92vh;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 32px 90px rgba(8, 12, 30, .28);
  overflow: hidden;
}
.project-dialog::backdrop {
  background: rgba(8, 12, 30, .72);
  backdrop-filter: blur(7px);
  -webkit-backdrop-filter: blur(7px);
}
.project-dialog[open] {
  transform-origin: center;
  animation: project-dialog-enter .28s cubic-bezier(.16, 1, .3, 1) both;
}
.project-dialog[open]::backdrop {
  animation: project-backdrop-enter .28s ease-out both;
}
.project-dialog.is-closing {
  pointer-events: none;
  animation: project-dialog-exit .18s cubic-bezier(.4, 0, 1, 1) both;
}
.project-dialog.is-closing::backdrop {
  animation: project-backdrop-exit .18s ease-in both;
}
@keyframes project-dialog-enter {
  from {
    opacity: 0;
    transform: translateY(12px) scale(.975);
    filter: brightness(.9) saturate(.94);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: brightness(1) saturate(1);
  }
}
@keyframes project-dialog-exit {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: brightness(1);
  }
  to {
    opacity: 0;
    transform: translateY(7px) scale(.985);
    filter: brightness(.94);
  }
}
@keyframes project-backdrop-enter {
  from {
    background: rgba(8, 12, 30, 0);
    backdrop-filter: blur(0);
    -webkit-backdrop-filter: blur(0);
  }
  to {
    background: rgba(8, 12, 30, .72);
    backdrop-filter: blur(7px);
    -webkit-backdrop-filter: blur(7px);
  }
}
@keyframes project-backdrop-exit {
  from {
    background: rgba(8, 12, 30, .72);
    backdrop-filter: blur(7px);
    -webkit-backdrop-filter: blur(7px);
  }
  to {
    background: rgba(8, 12, 30, 0);
    backdrop-filter: blur(0);
    -webkit-backdrop-filter: blur(0);
  }
}
.project-dialog-shell {
  display: flex;
  flex-direction: column;
  max-height: 92vh;
}
.project-dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.3rem;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  z-index: 2;
}
.project-dialog-heading { display: flex; align-items: center; gap: .85rem; min-width: 0; }
.project-dialog-logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
  border-radius: 12px;
  background: #f4f5ff;
  padding: 5px;
  flex-shrink: 0;
}
.project-dialog-eyebrow {
  color: var(--accent);
  font-size: .67rem;
  font-weight: 800;
  letter-spacing: .12em;
}
.project-dialog-heading h2 { font-size: 1.35rem; line-height: 1.2; }
.project-dialog-mark {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--accent-soft);
  font-size: 1.35rem;
  flex-shrink: 0;
}
.project-dialog-close {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text-muted);
  font-size: 1.8rem;
  line-height: 1;
  flex-shrink: 0;
  transition: color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.project-dialog-close:hover { color: var(--accent); border-color: var(--accent); transform: rotate(4deg); }
.project-dialog-close:focus-visible,
.case-link:focus-visible,
.case-screen-card a:focus-visible,
.case-product-card a:focus-visible,
.case-wide-media a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 45%, transparent);
  outline-offset: 3px;
}
.project-dialog-body {
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0 2.1rem 2.2rem;
  scrollbar-gutter: stable;
}

.case-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 210px;
  align-items: center;
  gap: 2rem;
  padding: 3rem 0 2.2rem;
  border-bottom: 1px solid var(--border);
}
.case-meta-row { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.15rem; }
.case-meta-row span {
  padding: .34rem .68rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: .72rem;
  font-weight: 700;
}
.case-kicker { color: var(--accent); font-size: .86rem; font-weight: 800; margin-bottom: .5rem; }
.case-hero h3 {
  max-width: 760px;
  font-size: clamp(1.75rem, 3vw, 2.65rem);
  line-height: 1.28;
  letter-spacing: -.035em;
}
.case-lead { max-width: 760px; margin-top: 1rem; color: var(--text-muted); font-size: 1rem; }
.case-mascot { width: 100%; max-width: 210px; justify-self: end; }
.case-project-icon {
  aspect-ratio: 1;
  object-fit: contain;
  border-radius: 28px;
  padding: .75rem;
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.case-hero-visual {
  width: 100%;
  max-width: 220px;
  aspect-ratio: 1;
  object-fit: contain;
  justify-self: end;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.case-hero-visual-wide { max-width: 260px; aspect-ratio: 1.9 / 1; object-fit: cover; }

.case-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 1.5rem 0 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--border);
  overflow: hidden;
}
.case-metrics div {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .15rem;
  padding: 1rem .5rem;
  background: var(--bg-soft);
  text-align: center;
}
.case-metrics strong { color: var(--accent); font-size: 1.3rem; }
.case-metrics span { color: var(--text-muted); font-size: .74rem; font-weight: 600; }

.case-section { padding: 3.1rem 0; border-bottom: 1px solid var(--border); }
.case-section-heading { max-width: 760px; margin-bottom: 1.5rem; }
.case-section-index {
  color: var(--accent);
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .1em;
  margin-bottom: .35rem;
}
.case-section-heading h3,
.case-award-copy h3 { font-size: clamp(1.45rem, 2.4vw, 2rem); line-height: 1.35; }
.case-section-heading > p:last-child,
.case-award-copy > p { margin-top: .6rem; color: var(--text-muted); }

.case-screen-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.case-screen-card,
.case-wide-media,
.case-demo-grid figure,
.case-award-media {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-soft);
  overflow: hidden;
}
.case-screen-card a,
.case-wide-media a { display: block; }
.case-screen-card img {
  width: 100%;
  aspect-ratio: 9 / 17;
  object-fit: cover;
  object-position: top;
  background: #f8f9ff;
  transition: transform .3s var(--ease);
}
.case-screen-card a:hover img,
.case-wide-media a:hover img { transform: scale(1.015); }
.case-screen-card figcaption,
.case-wide-media figcaption {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  padding: .9rem 1rem;
  background: var(--surface);
}
.case-screen-card figcaption strong,
.case-wide-media figcaption strong { font-size: .86rem; }
.case-screen-card figcaption span,
.case-wide-media figcaption span { color: var(--text-muted); font-size: .74rem; }
.case-media-hint { margin-top: .8rem; color: var(--text-muted); font-size: .72rem; text-align: right; }

.case-product-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.case-product-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-soft);
  overflow: hidden;
}
.case-product-card a { display: block; background: #fff; }
.case-product-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  object-position: top;
  transition: transform .3s var(--ease);
}
.case-product-card a:hover img { transform: scale(1.012); }
.case-product-card figcaption {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  padding: .9rem 1rem;
  background: var(--surface);
}
.case-product-card figcaption strong { font-size: .86rem; }
.case-product-card figcaption span { color: var(--text-muted); font-size: .74rem; }

.case-role-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.case-role-grid article {
  min-height: 230px;
  padding: 1.4rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg-soft);
}
.case-role-number { color: var(--accent); font-size: .72rem; font-weight: 800; letter-spacing: .08em; }
.case-role-grid h4 { margin-top: 1.4rem; font-size: 1.05rem; }
.case-role-grid p { margin-top: .6rem; color: var(--text-muted); font-size: .86rem; line-height: 1.75; }
.case-role-grid code {
  padding: .08rem .3rem;
  border-radius: 5px;
  background: var(--surface);
  color: var(--accent);
  font-size: .78rem;
  overflow-wrap: anywhere;
}

.case-flow-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: .75rem;
}
.case-flow-list-six { grid-template-columns: repeat(6, 1fr); }
.case-flow-list-four { grid-template-columns: repeat(4, 1fr); }
.case-flow-list article {
  position: relative;
  min-height: 150px;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-soft);
}
.case-flow-list article:not(:last-child)::after {
  content: "→";
  position: absolute;
  top: 50%;
  right: -.62rem;
  z-index: 1;
  width: 1.2rem;
  height: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--surface);
  color: var(--accent);
  font-size: .72rem;
  font-weight: 800;
}
.case-flow-list span { color: var(--accent); font-size: .68rem; font-weight: 800; letter-spacing: .08em; }
.case-flow-list strong { display: block; margin-top: 1.25rem; font-size: .88rem; }
.case-flow-list p { margin-top: .4rem; color: var(--text-muted); font-size: .72rem; line-height: 1.55; }

.case-architecture-list { display: grid; gap: 1.2rem; }
.case-wide-media img { width: 100%; max-height: 610px; object-fit: contain; background: #fff; transition: transform .3s var(--ease); }

.case-demo-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.case-demo-grid img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.case-demo-grid figcaption,
.case-award-media figcaption { padding: .8rem 1rem; color: var(--text-muted); font-size: .76rem; background: var(--surface); }

.case-plot-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: .8rem; }
.case-plot-grid figure,
.case-training-grid figure {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: #fff;
}
.case-plot-grid img { width: 100%; aspect-ratio: 1; object-fit: contain; }
.case-plot-grid figcaption,
.case-training-grid figcaption {
  padding: .7rem .9rem;
  border-top: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  font-size: .74rem;
  text-align: center;
}
.case-training-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.case-training-grid img { width: 100%; aspect-ratio: 4 / 3; object-fit: contain; }

.case-result-callout {
  display: grid;
  grid-template-columns: minmax(140px, .28fr) minmax(0, 1fr);
  align-items: center;
  gap: 1.2rem;
  padding: 1.4rem;
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--border));
  border-radius: var(--radius-md);
  background: var(--accent-soft);
}
.case-result-callout strong { color: var(--accent); font-size: 1.15rem; }
.case-result-callout p { color: var(--text-muted); font-size: .85rem; line-height: 1.7; }
.case-result-callout-award strong { font-size: 1.55rem; }

.case-award-section { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); align-items: center; gap: 2rem; }
.case-award-copy ul { display: grid; gap: .55rem; margin-top: 1.1rem; }
.case-award-copy li { position: relative; padding-left: 1.1rem; color: var(--text-muted); font-size: .84rem; }
.case-award-copy li::before { content: ""; position: absolute; left: 0; top: .65em; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }
.case-award-gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; min-width: 0; }
.case-award-media-featured { grid-column: 1 / -1; }
.case-award-media a { display: block; overflow: hidden; background: #fff; }
.case-award-media img { width: 100%; aspect-ratio: 1.28 / 1; object-fit: cover; object-position: center 34%; }
.case-award-media-portrait img { aspect-ratio: 1 / 1; object-position: center 42%; }
.case-award-media-document img { object-fit: contain; object-position: center; background: #fff; }
.case-award-media a img { transition: transform .3s var(--ease); }
.case-award-media a:hover img { transform: scale(1.012); }

.case-links { display: flex; flex-wrap: wrap; gap: .7rem; padding-top: 2rem; }
.case-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: .65rem 1rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-muted);
  font-size: .8rem;
  font-weight: 700;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}
.case-link:hover { color: var(--accent); border-color: var(--accent); }
.case-link-primary { color: #fff; border-color: var(--accent); background: var(--accent); }
.case-link-primary:hover { color: #fff; background: var(--accent-dark); border-color: var(--accent-dark); }

[data-theme="dark"] .project-dialog-logo,
[data-theme="dark"] .case-screen-card img { background: #eef1ff; }
[data-theme="dark"] .case-wide-media img,
[data-theme="dark"] .case-product-card a,
[data-theme="dark"] .case-project-icon,
[data-theme="dark"] .case-hero-visual { background: #fff; }

/* ---------- Other projects ---------- */
.other-projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}
.other-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  gap: .6rem;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.other-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.other-card-top { display: flex; align-items: center; justify-content: space-between; }
.other-card-top h4 { font-size: .98rem; font-weight: 800; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); flex-shrink: 0; }
.other-period { font-size: .76rem; font-weight: 700; color: var(--accent); }
.other-desc { font-size: .85rem; color: var(--text-muted); line-height: 1.6; flex-grow: 1; }
.other-link { font-size: .8rem; font-weight: 700; color: var(--accent); align-self: flex-start; }
.other-link:hover { text-decoration: underline; }

/* ---------- Awards ---------- */
.awards-list { display: flex; flex-direction: column; gap: 1rem; margin-bottom: 2.5rem; }
.award-item {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  padding: 1.2rem 1.4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
.award-icon { font-size: 1.5rem; flex-shrink: 0; }
.award-title { font-size: .96rem; margin-bottom: .2rem; }
.award-date { font-size: .8rem; color: var(--text-muted); }

.award-evidence { margin-bottom: 2.5rem; }
.award-evidence-heading { margin-bottom: 1.2rem; }
.award-evidence-heading h3 { font-size: clamp(1.25rem, 2vw, 1.6rem); }
.award-evidence-heading > p:last-child { margin-top: .35rem; color: var(--text-muted); font-size: .82rem; }
.award-evidence-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.award-evidence-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}
.award-evidence-card a { display: block; overflow: hidden; background: #fff; }
.award-evidence-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: #fff;
  transition: transform .3s var(--ease);
}
.award-evidence-card-photo img { object-fit: cover; object-position: center 32%; }
.award-evidence-card a:hover img { transform: scale(1.015); }
.award-evidence-card figcaption { display: flex; flex-direction: column; gap: .2rem; padding: .9rem 1rem; }
.award-evidence-card figcaption strong { font-size: .85rem; }
.award-evidence-card figcaption span { color: var(--text-muted); font-size: .72rem; }

.education-note {
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: 1.1rem 1.4rem;
  border-radius: var(--radius-md);
  background: var(--accent-soft);
  font-size: .95rem;
  width: fit-content;
}

/* ---------- Work style ---------- */
.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
}
.work-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.9rem;
}
.work-num {
  display: inline-block;
  font-size: .85rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 1rem;
}
.work-card h3 { font-size: 1.03rem; font-weight: 800; margin-bottom: .7rem; line-height: 1.4; }
.work-card p { font-size: .89rem; color: var(--text-muted); line-height: 1.7; }

/* ---------- Contact ---------- */
.contact-section { text-align: center; }
.contact-inner { max-width: 600px; }
.contact-text { color: var(--text-muted); margin-bottom: 2rem; font-size: 1rem; }
.contact-links { display: flex; justify-content: center; gap: 1.6rem; margin-top: 2.2rem; }
.contact-links a { font-size: .88rem; font-weight: 700; color: var(--text-muted); }
.contact-links a:hover { color: var(--accent); }

/* ---------- Footer ---------- */
.footer { padding: 2rem 0; border-top: 1px solid var(--border); }
.footer-inner { display: flex; align-items: center; justify-content: center; }
.footer span { font-size: .82rem; color: var(--text-muted); }

.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: all .25s var(--ease);
  z-index: 60;
}
.to-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.to-top:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-2px); }

/* ---------- Section dots (mobile quick-nav) ---------- */
.section-dots {
  position: fixed;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 70;
  display: none;
  flex-direction: column;
  align-items: center;
}
.section-dots-track {
  position: absolute;
  left: 50%;
  top: 13px;
  bottom: 13px;
  width: 2px;
  background: var(--border);
  transform: translateX(-50%);
  border-radius: 2px;
  overflow: hidden;
}
.section-dots-fill {
  position: absolute;
  left: 0; top: 0;
  width: 100%;
  height: 0%;
  background: var(--accent);
  transition: height .3s var(--ease);
}
.dot-link {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  flex-shrink: 0;
}
.dot-link .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--border);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 1px var(--border);
  transition: background-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}
.dot-link.active .dot {
  background: var(--accent);
  transform: scale(1.4);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.dot-label {
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%) translateX(6px);
  white-space: nowrap;
  font-size: .72rem;
  font-weight: 700;
  padding: .3rem .65rem;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  box-shadow: var(--shadow-sm);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s var(--ease), transform .2s var(--ease);
}
.dot-link.active .dot-label {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.in-view { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .blob, .scroll-cue { animation: none; }
  .project-dialog[open],
  .project-dialog[open]::backdrop,
  .project-dialog.is-closing,
  .project-dialog.is-closing::backdrop { animation: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-avatar { display: flex; align-items: center; gap: 1.2rem; text-align: left; }
  .avatar-circle { margin: 0; width: 84px; height: 84px; font-size: 1.8rem; flex-shrink: 0; }
  .avatar-caption { text-align: left; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
  .other-projects-grid { grid-template-columns: repeat(2, 1fr); }
  .work-grid { grid-template-columns: 1fr; }
  .case-hero { grid-template-columns: 1fr 150px; }
  .case-screen-grid { grid-template-columns: repeat(2, 1fr); }
  .case-role-grid { grid-template-columns: 1fr; }
  .case-role-grid article { min-height: 0; }
  .case-flow-list,
  .case-flow-list-four,
  .case-flow-list-six { grid-template-columns: repeat(3, 1fr); }
  .case-flow-list article::after { display: none !important; }
  .case-plot-grid { grid-template-columns: repeat(2, 1fr); }
  .case-award-section { grid-template-columns: 1fr; }
  .award-evidence-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    top: var(--header-h); left: 0; right: 0;
    flex-direction: column;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 1.2rem 24px 1.6rem;
    gap: 1.1rem;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .22s var(--ease), transform .22s var(--ease);
  }
  .nav-links.open { opacity: 1; transform: translateY(0); pointer-events: auto; box-shadow: var(--shadow-md); }
  .nav-toggle { display: flex; }
  .section { padding: 80px 0; }
  .hero-stats { gap: 1.6rem; }
  .section-dots { display: flex; }
}

@media (max-width: 560px) {
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .skill-card { padding: 1rem; }
  .other-projects-grid { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; width: 100%; }
  .hero-cta .btn { width: 100%; justify-content: center; }
  .card-head { flex-direction: column; }
  .footer-inner { flex-direction: column; gap: 1rem; text-align: center; }
  .usage-stats { grid-template-columns: repeat(2, 1fr); row-gap: .6rem; }
  .usage-stat::after { display: none; }
  .usage-stat:nth-child(n+3) { border-top: 1px solid var(--border); padding-top: .5rem; }
  .project-dialog { width: calc(100% - 14px); max-height: 96vh; border-radius: 18px; }
  .project-dialog-shell { max-height: 96vh; }
  .project-dialog-header { padding: .8rem .9rem; }
  .project-dialog-logo { width: 38px; height: 38px; }
  .project-dialog-mark { width: 38px; height: 38px; font-size: 1.15rem; }
  .project-dialog-close { width: 38px; height: 38px; }
  .project-dialog-body { padding: 0 1rem 1.4rem; }
  .case-hero { grid-template-columns: 1fr; gap: 1.1rem; padding: 2rem 0 1.6rem; }
  .case-mascot { width: 120px; justify-self: start; }
  .case-hero-visual { width: 150px; justify-self: start; }
  .case-hero-visual-wide { width: 220px; max-width: 100%; }
  .case-hero h3 { font-size: 1.75rem; }
  .case-lead { font-size: .9rem; }
  .case-metrics { grid-template-columns: repeat(2, 1fr); }
  .case-section { padding: 2.4rem 0; }
  .case-screen-grid { gap: .65rem; }
  .case-screen-card figcaption { padding: .7rem; }
  .case-screen-card figcaption span { font-size: .68rem; }
  .case-product-grid { grid-template-columns: 1fr; }
  .case-flow-list,
  .case-flow-list-four,
  .case-flow-list-six { grid-template-columns: 1fr; }
  .case-flow-list article { min-height: 0; }
  .case-flow-list strong { margin-top: .75rem; }
  .case-training-grid { grid-template-columns: 1fr; }
  .case-result-callout { grid-template-columns: 1fr; gap: .55rem; }
  .case-demo-grid { grid-template-columns: 1fr; }
  .case-award-gallery,
  .award-evidence-grid { grid-template-columns: 1fr; }
  .case-award-media-featured { grid-column: auto; }
  .case-links { display: grid; grid-template-columns: repeat(2, 1fr); }
  .case-link-primary { grid-column: 1 / -1; }
}