/* ============================================================
   한결 (HANGYEOL) — Portfolio Site
   Light-mode tokens, derived from the Hangyeol design system.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+KR:wght@200;300;400&family=Noto+Sans+KR:wght@300;400;500&family=JetBrains+Mono:wght@300;400&display=swap');

:root {
  /* Light palette */
  --bg:           #F5F2EE;   /* ivory base */
  --s1:           #EDEAE5;   /* card / panel */
  --s2:           #E4E0DA;   /* elevated */
  --border:       #D4CEC8;
  --border-muted: #E0DAD4;

  --fg1: #2A2420;            /* primary text — warm dark brown */
  --fg2: #7A6858;            /* secondary */
  --fg3: #B0A89E;            /* placeholder / disabled */

  --accent:        #C4A87A;  /* film amber */
  --accent-muted:  #7A6A52;

  /* Type */
  --font-display: 'Noto Serif KR', Georgia, serif;
  --font-body:    'Noto Sans KR', 'Apple SD Gothic Neo', sans-serif;
  --font-mono:    'JetBrains Mono', Menlo, monospace;

  --tracking-tight:  -0.02em;
  --tracking-wide:    0.06em;
  --tracking-widest:  0.15em;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --d-fast: 200ms;
  --d-base: 300ms;
  --d-slow: 500ms;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
img { display: block; max-width: 100%; }
button { font: inherit; }

body {
  background: var(--bg);
  color: var(--fg1);
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--fg3); }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: 56px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(245, 242, 238, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-muted);
  z-index: 100;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: var(--fg1);
  user-select: none;
  flex-shrink: 0;
  white-space: nowrap;
}
.brand .wordmark {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 200;
  letter-spacing: var(--tracking-tight);
  color: var(--fg1);
  white-space: nowrap;
}
.brand .latin {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--fg3);
  white-space: nowrap;
}
@media (max-width: 720px) {
  .brand .latin { display: none; }
  .site-header { padding: 0 16px; gap: 12px; }
}

.cat-nav {
  display: flex;
  gap: 2px;
  flex: 1 1 auto;
  justify-content: center;
  overflow-x: auto;
  scrollbar-width: none;
}
.cat-nav::-webkit-scrollbar { display: none; }
.cat-nav button {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 300;
  color: var(--fg3);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 3px;
  padding: 5px 12px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: color var(--d-fast) var(--ease),
              background var(--d-fast) var(--ease),
              border-color var(--d-fast) var(--ease);
}
.cat-nav button:hover { color: var(--fg2); }
.cat-nav button.active {
  color: var(--fg1);
  background: var(--s1);
  border-color: var(--border);
}

.count {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg3);
  letter-spacing: var(--tracking-wide);
  min-width: 40px;
  text-align: right;
  flex-shrink: 0;
}
@media (max-width: 480px) {
  .count { display: none; }
}

/* ---------- Home / Grid ---------- */
.home-main { padding-top: 56px; }

.hero {
  padding: 64px 32px 48px;
  text-align: center;
  border-bottom: 1px solid var(--border-muted);
}
.hero .label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--accent);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 300;
  line-height: 1.3;
  letter-spacing: var(--tracking-tight);
  color: var(--fg1);
  margin-bottom: 12px;
}
.hero p {
  font-size: 14px;
  color: var(--fg2);
  font-weight: 300;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  padding: 2px;
}
@media (max-width: 900px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .grid { grid-template-columns: 1fr; } }

.tile {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--s1);
  cursor: zoom-in;
  text-decoration: none;
  color: inherit;
  display: block;
}
.tile img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 700ms var(--ease), opacity var(--d-slow) var(--ease);
}
.tile:hover img { transform: scale(1.04); }

.tile .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(245, 242, 238, 0.9) 0%, transparent 55%);
  opacity: 0;
  transition: opacity 400ms var(--ease);
  pointer-events: none;
}
.tile:hover .overlay { opacity: 1; }

.tile .info {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 20px 18px 16px;
  transform: translateY(6px);
  opacity: 0;
  transition: transform 350ms var(--ease), opacity 350ms var(--ease);
  pointer-events: none;
}
.tile:hover .info { opacity: 1; transform: translateY(0); }
.tile .info .title {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 300;
  color: var(--fg1);
  margin-bottom: 4px;
  letter-spacing: var(--tracking-tight);
}
.tile .info .meta {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--accent);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
}

.tile .badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  background: rgba(245, 242, 238, 0.85);
  color: var(--fg2);
  border-radius: 2px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  transition: opacity var(--d-base) var(--ease);
}
.tile:hover .badge { opacity: 1; }

/* ---------- Footer ---------- */
.site-footer {
  padding: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-muted);
  margin-top: 64px;
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--fg3);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

/* ---------- Detail Page ---------- */
.detail-main { padding: 88px 32px 48px; max-width: 1280px; margin: 0 auto; }

.detail-header-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 24px;
  gap: 24px;
  flex-wrap: wrap;
}

.detail-meta { display: flex; align-items: baseline; gap: 18px; flex-wrap: wrap; }
.detail-meta .crumb {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--accent);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
}
.detail-meta .device {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 300;
  color: var(--fg2);
  letter-spacing: var(--tracking-wide);
}
.detail-meta .device::before {
  content: '·';
  color: var(--fg3);
  margin-right: 14px;
}

.detail-title {
  font-family: var(--font-display);
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 200;
  letter-spacing: var(--tracking-tight);
  color: var(--fg1);
  margin: 24px 0 8px;
}
.detail-tagline {
  font-size: 13px;
  color: var(--fg2);
  margin-bottom: 40px;
}

.back-link {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg2);
  text-decoration: none;
  letter-spacing: var(--tracking-wide);
  border-bottom: 1px solid transparent;
  transition: color var(--d-fast), border-color var(--d-fast);
  text-transform: uppercase;
}
.back-link:hover { color: var(--fg1); border-color: var(--border); }

/* ---- Side-by-side comparison (capture-friendly) ---- */
.compare-card {
  background: var(--s1);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 32px;
  margin-bottom: 32px;
}
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}
@media (max-width: 720px) {
  .compare-grid { grid-template-columns: 1fr; }
}
.compare-frame {
  position: relative;
  background: var(--s2);
  border-radius: 2px;
  overflow: hidden;
}
.compare-frame img {
  width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
}
.compare-frame .stamp {
  position: absolute;
  top: 10px;
  left: 10px;
  padding: 3px 8px;
  background: rgba(245, 242, 238, 0.42);   /* glassmorphism — light film */
  color: var(--fg1);
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  border-radius: 2px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  box-shadow: 0 2px 12px rgba(42, 36, 32, 0.05);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
}
.compare-frame.after .stamp {
  /* Amber-tinted frosted glass — keeps brand accent without screaming */
  background: rgba(196, 168, 122, 0.4);
  color: rgba(58, 48, 36, 0.92);
  border-color: rgba(196, 168, 122, 0.55);
}
.compare-caption {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-top: 12px;
  border-top: 1px solid var(--border-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg3);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}
.compare-caption .right { color: var(--accent); }

/* ---- Interactive slider ---- */
.slider-section h2 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 300;
  color: var(--fg1);
  margin-bottom: 6px;
  letter-spacing: var(--tracking-tight);
}
.slider-hint {
  font-size: 12px;
  color: var(--fg2);
  margin-bottom: 16px;
}

.slider {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 2;          /* default; overridden by JS once after-img loads */
  background: var(--s2);
  overflow: hidden;
  border-radius: 4px;
  user-select: none;
  border: 1px solid var(--border);
  cursor: ew-resize;
  touch-action: none;
}
.slider .layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.slider .layer img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.slider .top-layer {
  position: absolute;
  inset: 0;
  width: 50%;
  overflow: hidden;
  pointer-events: none;
}
.slider .top-layer img {
  width: var(--slider-w, 100%);   /* set by JS so left half matches the after view */
  height: 100%;
  max-width: none;
  object-fit: cover;
  object-position: left center;
  display: block;
}
.slider .handle {
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--bg);
  transform: translateX(-1px);
  pointer-events: none;
  box-shadow: 0 0 0 1px var(--accent);
}
.slider .knob {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 36px;
  height: 36px;
  transform: translate(-50%, -50%);
  background: var(--bg);
  border: 1.5px solid var(--accent);
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.05em;
  color: var(--accent);
  pointer-events: none;
  box-shadow: 0 4px 12px rgba(42, 36, 32, 0.08);
}
.slider .stamp {
  position: absolute;
  top: 10px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  border-radius: 2px;
  pointer-events: none;
  z-index: 4;
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  box-shadow: 0 2px 12px rgba(42, 36, 32, 0.06);
}
.slider .stamp-before {
  left: 10px;
  background: rgba(245, 242, 238, 0.42);
  color: var(--fg1);
  border: 1px solid rgba(255, 255, 255, 0.55);
}
.slider .stamp-after {
  right: 10px;
  background: rgba(196, 168, 122, 0.4);
  color: rgba(58, 48, 36, 0.92);
  border: 1px solid rgba(196, 168, 122, 0.55);
}

.slider-nav {
  margin-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-muted);
  padding-top: 16px;
}
.slider-nav .nav-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--fg2);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 8px 14px;
  cursor: pointer;
  transition: all var(--d-fast) var(--ease);
  text-decoration: none;
}
.slider-nav .nav-btn:hover { color: var(--fg1); border-color: var(--accent); }
.slider-nav .nav-btn[aria-disabled="true"] {
  color: var(--fg3);
  cursor: not-allowed;
  pointer-events: none;
  border-color: var(--border-muted);
}
.slider-nav .position {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg3);
  letter-spacing: var(--tracking-wide);
}

/* ---------- Empty / Loading ---------- */
.empty {
  padding: 96px 32px;
  text-align: center;
  color: var(--fg2);
  font-size: 14px;
}