@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;700&display=swap');
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable.css');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&display=swap');

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

:root {
  /* ── Palette ──────────────────────────────
     Base: warm graphite (near-black, not neutral gray)
     Accent: darkroom-safelight amber — this is an image tool,
     the whole flow (import → crop → slice) mirrors a darkroom's
     process, so the accent leans into that rather than a generic
     system blue or acid green. */
  --bg:       #131316;
  --layer:    #1a1b1f;
  --raised:   #212226;
  --raised-2: #26272c;
  --border:   #2c2d33;
  --border-2: rgba(255,255,255,0.06);
  --mute:     #6b6d76;
  --dim:      #999ba5;
  --sub:      #d7d8dd;
  --text:     #f5f5f7;

  --accent:      #ff8a4c;
  --accent-ink:  #1a0f08;
  --accent-soft: rgba(255,138,76,0.14);
  --accent-dim:  #c96f3d;

  --gold:     #ffcf5c;
  --confirm:  #34c77a;
  --warn:     #ff5d52;

  /* ── Typography ──────────────────────────────
     Pretendard Variable → interface chrome: buttons, labels,
     nav, controls, headings.
     Noto Sans KR → Korean sentence-level content: descriptions,
     hints, guidance copy — reads a touch more legible at body size.
     JetBrains Mono → numbers/technical strings: dimensions, step
     counters, tile indices. */
  --font-ui: 'Pretendard Variable', -apple-system, 'Apple SD Gothic Neo', sans-serif;
  --font-kr: 'Noto Sans KR', 'Pretendard Variable', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
  --font: var(--font-ui); /* alias kept for existing component rules */

  /* ── Geometry ── */
  --r:    12px;
  --r-sm: 7px;
  --gap:  16px;
  --ease: 160ms cubic-bezier(.4,0,.2,1);
}

html { font-size: 15px; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.55;
  min-height: 100dvh;
  letter-spacing: -0.01em;
}

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-thumb { background: var(--mute); border-radius: 2px; }

/* ═══════════════════════════════════════════════
   SIGNATURE — measuring-tape ruler strip
   (ticks = the same idea as slicing an image into
   precisely measured pieces)
═══════════════════════════════════════════════ */
.ruler {
  position: absolute; top: 0; left: 0; right: 0; height: 22px;
  background-image:
    repeating-linear-gradient(to right, var(--mute) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(to right, var(--border-2) 0 1px, transparent 1px 12px);
  background-position: bottom left, bottom left;
  background-repeat: repeat-x;
  background-size: 100% 12px, 100% 6px;
  opacity: 0.55;
  pointer-events: none;
}

/* ═══════════════════════════════════════════════
   PRIMITIVES
═══════════════════════════════════════════════ */

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 0 16px; height: 36px;
  border: none; border-radius: var(--r-sm);
  font: 500 0.867rem/1 var(--font);
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: opacity var(--ease), transform var(--ease), background var(--ease), border-color var(--ease);
  white-space: nowrap;
}
.btn:active  { transform: scale(0.96); opacity: 0.85; }
.btn:disabled { opacity: 0.28; pointer-events: none; }

.btn-accent  { background: var(--accent); color: var(--accent-ink); font-weight: 600; }
.btn-accent:hover { background: #ff9c68; }
.btn-plain   { background: var(--raised); color: var(--sub); border: 1px solid var(--border); }
.btn-plain:hover { color: var(--text); border-color: var(--mute); }
.btn-red     { background: transparent; color: var(--warn); border: 1px solid color-mix(in srgb, var(--warn) 32%, transparent); }
.btn-red:hover { background: rgba(255,93,82,0.08); }
.btn-green   { background: var(--confirm); color: #06210f; font-weight: 600; }
.btn-green:hover { background: #3fdb8a; }

/* Inputs */
.ctrl {
  height: 36px; padding: 0 10px;
  background: var(--raised); border: 1px solid var(--border);
  border-radius: var(--r-sm); color: var(--text);
  font: 400 0.867rem var(--font); letter-spacing: -0.01em;
  transition: border-color var(--ease);
}
.ctrl:focus { outline: none; border-color: var(--accent); }
select.ctrl { cursor: pointer; }
input.ctrl   { width: 68px; font-family: var(--font-mono); }

/* Labels */
.label {
  font-size: 0.76rem; font-weight: 600;
  color: var(--dim); letter-spacing: 0.07em; text-transform: uppercase;
  font-family: var(--font-mono);
}

/* Divider */
.divider {
  width: 100%; height: 1px;
  background: var(--border); margin: 24px 0;
}

/* Lang picker */
.lang-wrap { position: relative; }
.lang-btn {
  display: flex; align-items: center; gap: 5px;
  padding: 0 11px; height: 30px;
  background: var(--layer); border: 1px solid var(--border);
  border-radius: 999px; color: var(--dim);
  font: 400 0.8rem var(--font); cursor: pointer;
  transition: color var(--ease), border-color var(--ease);
}
.lang-btn:hover { color: var(--sub); border-color: var(--mute); }
.lang-menu {
  display: none; position: absolute; top: calc(100% + 6px); right: 0; z-index: 99;
  background: var(--layer); border: 1px solid var(--border);
  border-radius: var(--r); list-style: none; min-width: 116px;
  overflow: hidden; box-shadow: 0 16px 44px rgba(0,0,0,0.55);
}
.lang-wrap.open .lang-menu { display: block; }
.lang-opt {
  display: block; width: 100%; padding: 9px 14px;
  background: none; border: none; color: var(--dim);
  font: 400 0.867rem var(--font); text-align: left; cursor: pointer;
  transition: background var(--ease), color var(--ease);
}
.lang-opt:hover { background: var(--raised); color: var(--text); }
.lang-opt.on    { color: var(--accent); }

/* ═══════════════════════════════════════════════
   WELCOME
═══════════════════════════════════════════════ */
#welcome {
  position: relative;
  display: flex; flex-direction: column;
  justify-content: center;
  min-height: 100dvh;
  padding: 60px 48px;
  max-width: 1040px; margin: 0 auto;
  overflow: hidden;
}

.w-lang { position: fixed; top: 22px; right: 24px; z-index: 100; }

.w-body {
  display: flex; align-items: center; gap: 56px;
}
.w-textcol { flex: 0 0 auto; max-width: 400px; }
.w-visual  { flex: 1 1 380px; max-width: 460px; }

.w-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font: 600 0.7rem var(--font-mono); letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 16px;
}
.w-eyebrow::before {
  content: ''; width: 14px; height: 1px; background: var(--accent);
}

.w-wordmark {
  font-size: 3.1rem; font-weight: 700;
  letter-spacing: -0.045em; line-height: 1;
  color: var(--text);
  margin-bottom: 14px;
}
.w-wordmark span { color: var(--accent); }

.w-desc {
  font: 300 1.02rem/1.7 var(--font-kr);
  color: var(--dim);
  white-space: pre-line;
  max-width: 380px;
  margin-bottom: 36px;
}

.w-actions { display: flex; align-items: center; gap: 12px; }

.w-start {
  height: 46px; padding: 0 30px;
  font-size: 0.933rem; font-weight: 600;
  border-radius: var(--r-sm);
}

.w-note {
  margin-top: 56px;
  font-size: 0.76rem; color: var(--mute);
  font-family: var(--font-mono);
  border-top: 1px solid var(--border);
  padding-top: 18px; width: 100%;
  letter-spacing: 0.01em;
}

/* welcome animations */
.t1 { animation: tIn .45s ease both; }
.t2 { animation: tIn .45s .07s ease both; }
.t3 { animation: tIn .45s .14s ease both; }
.t4 { animation: tIn .45s .21s ease both; }

@keyframes tIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Before/After slider ── */
.ba-slider {
  position: relative; width: 100%; aspect-ratio: 9 / 16; max-height: 62dvh;
  margin: 0 auto; border-radius: var(--r); overflow: hidden;
  border: 1px solid var(--border); background: var(--layer);
  box-shadow: 0 28px 64px rgba(0,0,0,0.5);
  cursor: ew-resize; user-select: none;
}
.ba-img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; display: block; pointer-events: none;
}
.ba-clip {
  position: absolute; inset: 0; width: 55%; overflow: hidden;
}
.ba-clip .ba-img { max-width: none; }

.ba-handle {
  position: absolute; top: 0; bottom: 0; left: 55%;
  transform: translateX(-50%);
  display: flex; align-items: center; justify-content: center;
  width: 0; pointer-events: none;
}
.ba-handle::before {
  content: ''; position: absolute; top: 0; bottom: 0; left: 50%;
  width: 1.5px; transform: translateX(-50%);
  background: linear-gradient(
    to bottom,
    rgba(255,138,76,0) 0%,
    rgba(255,138,76,0.95) 12%,
    rgba(255,138,76,0.95) 88%,
    rgba(255,138,76,0) 100%
  );
  box-shadow: 0 0 8px rgba(255,138,76,0.35);
}
.ba-handle-grip {
  position: relative; width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255,138,76,0.2);
  border: 1px solid rgba(255,255,255,0.55);
  backdrop-filter: blur(10px) saturate(1.4);
  -webkit-backdrop-filter: blur(10px) saturate(1.4);
  box-shadow:
    0 2px 10px rgba(0,0,0,0.35),
    inset 0 0 0 0.5px rgba(255,255,255,0.3);
  display: flex; align-items: center; justify-content: center; gap: 3px;
  color: #fff;
  transition: transform var(--ease), background var(--ease);
}
.ba-slider:active .ba-handle-grip,
.ba-slider.dragging .ba-handle-grip { transform: scale(1.08); background: rgba(255,138,76,0.32); }
.ba-handle-grip svg { display: block; opacity: 0.95; }

.ba-tag {
  position: absolute; top: 12px; z-index: 2;
  font-size: 0.68rem; font-weight: 600; letter-spacing: 0.08em;
  font-family: var(--font-mono);
  padding: 4px 9px; border-radius: 999px; color: #fff;
  background: rgba(0,0,0,0.55); backdrop-filter: blur(4px);
  pointer-events: none;
}
.ba-tag-before { left: 12px; }
.ba-tag-after  { right: 12px; }

/* ═══════════════════════════════════════════════
   WORKSPACE
═══════════════════════════════════════════════ */
#workspace { display: flex; flex-direction: column; min-height: 100dvh; }

/* Top bar */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; height: 52px;
  background: rgba(19,19,22,0.86);
  backdrop-filter: blur(18px) saturate(1.6);
  -webkit-backdrop-filter: blur(18px) saturate(1.6);
  border-bottom: 1px solid var(--border);
}
.tb-left { display: flex; align-items: center; gap: 14px; }
.tb-name { font-size: 0.9rem; font-weight: 700; letter-spacing: -0.01em; }
.tb-name::before {
  content: ''; display: inline-block; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); margin-right: 8px; vertical-align: middle;
  box-shadow: 0 0 8px var(--accent);
}
.tb-step {
  font: 500 0.7rem/1 var(--font-mono); color: var(--dim);
  padding: 4px 8px; background: var(--raised); border: 1px solid var(--border);
  border-radius: 999px; letter-spacing: 0.02em;
}

.tb-progress { display: flex; align-items: center; gap: 4px; }
.tb-progress .tick {
  width: 14px; height: 3px; border-radius: 2px;
  background: var(--border); transition: background var(--ease);
}
.tb-progress .tick.on { background: var(--accent); }

/* Content */
.content {
  flex: 1; display: flex; flex-direction: column; align-items: center;
  padding: 48px 24px 72px;
}

/* Phase */
.phase { display: none; width: 100%; max-width: 720px; }
.phase.on { display: block; animation: pIn .25s ease both; }
@keyframes pIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Phase header */
.ph { margin-bottom: 28px; }
.ph-title { font-size: 1.22rem; font-weight: 700; margin-bottom: 5px; letter-spacing: -0.015em; }
.ph-desc  { font: 400 0.867rem/1.55 var(--font-kr); color: var(--dim); }

/* Bottom actions */
.acts {
  display: flex; align-items: center; gap: 8px;
  justify-content: flex-end; margin-top: 24px;
}
.acts .gap { flex: 1; }

/* ═══════════════════════════════════════════════
   PHASE 1 — GRID
═══════════════════════════════════════════════ */
:root { --cw: 44px; }

/* dim controls */
.dim-bar  { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 12px; margin-bottom: 14px; }
.dim-unit { display: flex; flex-direction: column; gap: 6px; }
.dim-sep  { color: var(--mute); font-size: 0.95rem; padding-bottom: 8px; font-family: var(--font-mono); }

/* cell grid */
.cell-wrap {
  width: 100%; overflow-x: auto; padding: 16px; padding-bottom: 20px;
  background:
    linear-gradient(var(--layer), var(--layer)),
    repeating-linear-gradient(to right, var(--border-2) 0 1px, transparent 1px 22px),
    repeating-linear-gradient(to bottom, var(--border-2) 0 1px, transparent 1px 22px);
  border: 1px solid var(--border); border-radius: var(--r);
}
.cell-grid {
  display: grid; gap: 2px; width: fit-content; margin: 0 auto;
  user-select: none; touch-action: none;
}
.cell {
  width: var(--cw); height: var(--cw);
  background: var(--raised); border: 1px solid var(--border);
  border-radius: var(--r-sm); position: relative; cursor: crosshair;
  transition: background var(--ease), border-color var(--ease);
}
.cell.hov { background: rgba(255,138,76,0.14); border-color: rgba(255,138,76,0.5); box-shadow: 0 0 0 1px rgba(255,138,76,0.25), inset 0 0 8px rgba(255,138,76,0.08); }
.c-num {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font: 700 0.73rem var(--font-mono); pointer-events: none;
}

.hint {
  display: flex; align-items: center; gap: 8px;
  font: 400 0.8rem/1.5 var(--font-kr); color: var(--mute);
  padding: 9px 12px; background: var(--layer); border: 1px solid var(--border);
  border-radius: var(--r-sm); margin-bottom: 14px;
}
.hint::before { content: '↳'; color: var(--accent); font-weight: 700; }

/* ═══════════════════════════════════════════════
   PHASE 2 — IMPORT
═══════════════════════════════════════════════ */
.drop-zone {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 14px; padding: 56px 24px;
  border: 1.5px dashed var(--border); border-radius: var(--r);
  background: var(--layer);
  transition: border-color var(--ease), background var(--ease);
}
.drop-zone.drag { border-color: var(--accent); background: var(--accent-soft); }
.dz-icon {
  width: 40px; height: 40px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--raised); border: 1px solid var(--border);
  color: var(--dim);
}
.dz-title { font: 400 0.933rem/1.5 var(--font-kr); color: var(--sub); }
.dz-sub   { font-size: 0.8rem;   color: var(--mute); font-family: var(--font-mono); }

.thumb-wrap { margin-top: 14px; }
.thumb-wrap img {
  display: block; max-width: 100%; max-height: 280px;
  border-radius: var(--r); border: 1px solid var(--border);
}

/* ═══════════════════════════════════════════════
   PHASE 3 — CROP
═══════════════════════════════════════════════ */
.crop-wrap {
  display: flex; justify-content: center;
  background: var(--layer); border: 1px solid var(--border);
  border-radius: var(--r); padding: 12px; overflow: hidden;
}
#cropCv { display: block; border-radius: var(--r-sm); }

/* ═══════════════════════════════════════════════
   PHASE 4 — RESULT
═══════════════════════════════════════════════ */
.map-row  { display: flex; justify-content: center; margin-bottom: 28px; }
.map-row canvas { border-radius: var(--r-sm); border: 1px solid var(--border); }

.pick-desc {
  font: 400 0.84rem/1.65 var(--font-kr); color: var(--dim); margin-bottom: 12px;
}
.pick-desc strong { color: var(--sub); }

.tile-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.tile {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 8px; background: var(--layer);
  border: 1px solid var(--border); border-radius: var(--r-sm);
  cursor: pointer;
  transition: border-color var(--ease), background var(--ease);
}
.tile:hover { border-color: var(--mute); }
.tile.on    { border-color: var(--gold); background: rgba(255,207,92,0.08); }
.tile canvas { border-radius: 3px; display: block; }
.tile-n { font-size: 0.68rem; color: var(--mute); font-family: var(--font-mono); }
.tile.on .tile-n { color: var(--gold); }

.warn-box {
  display: flex; gap: 10px; align-items: flex-start;
  font: 400 0.8rem/1.65 var(--font-kr); color: var(--dim);
  padding: 12px 14px;
  background: rgba(255,93,82,0.06); border: 1px solid rgba(255,93,82,0.18);
  border-radius: var(--r-sm);
}
.warn-box::before { content: '!'; flex: none; display: flex; align-items: center; justify-content: center;
  width: 16px; height: 16px; border-radius: 50%; background: var(--warn); color: #240604;
  font: 800 0.7rem var(--font-mono); margin-top: 2px; }

.guide-box {
  margin-top: 28px; padding: 20px 22px;
  background: var(--layer); border: 1px solid var(--border); border-radius: var(--r);
}
.guide-box p { font: 400 0.84rem/1.7 var(--font-kr); color: var(--dim); }
.guide-box p strong { color: var(--accent); font-weight: 600; }

/* ═══════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════ */
@media (max-width: 860px) {
  #welcome { padding: 40px 24px; align-items: center; }
  .w-body { flex-direction: column-reverse; gap: 32px; }
  .w-textcol { max-width: 460px; display: flex; flex-direction: column; align-items: center; text-align: center; }
  .w-eyebrow::before { display: none; }
  .w-note { width: 100%; }
  .w-textcol .w-actions { justify-content: center; }
  .w-visual { width: 100%; max-width: 340px; }
  .ba-slider { aspect-ratio: 9 / 14; max-height: 46dvh; }
}

@media (max-width: 500px) {
  :root { --cw: 36px; }
  #welcome { padding: 48px 24px; }
  .w-wordmark { font-size: 2.3rem; }
  .topbar  { padding: 0 16px; }
  .tb-progress { display: none; }
  .content { padding: 28px 16px 56px; }
  .drop-zone { padding: 40px 16px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}