@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,300;0,400;0,500;1,300&family=Unbounded:wght@400;700&display=swap');

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

:root {
  --bg:       #f2efe8;
  --surface:  #ebe8e0;
  --ink:      #1a1814;
  --muted:    #8a8780;
  --border:   #d4d0c8;
  --accent:   #c94a1a;
  --mono:     'IBM Plex Mono', monospace;
  --display:  'Unbounded', sans-serif;
}

html { font-size: 14px; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  min-height: 100vh;
}

/* ── LAYOUT ─────────────────────────────────────────────────── */
.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── HEADER ─────────────────────────────────────────────────── */
header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 28px 0 20px;
  border-bottom: 1.5px solid var(--ink);
  margin-bottom: 40px;
}

.logo {
  font-family: var(--display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--ink);
}

.logo span {
  color: var(--accent);
}

.tagline {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--muted);
  text-transform: uppercase;
  font-style: italic;
}

/* ── UPLOAD ─────────────────────────────────────────────────── */
#upload-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 80px 0;
}

#upload-zone {
  width: 100%;
  max-width: 600px;
  border: 2px dashed var(--border);
  background: var(--surface);
  padding: 64px 40px;
  text-align: center;
  cursor: pointer;
  position: relative;
  transition: border-color 0.15s, background 0.15s;
}

#upload-zone:hover,
#upload-zone.drag {
  border-color: var(--accent);
  background: #ede9e0;
}

#upload-zone input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.upload-icon {
  width: 40px;
  height: 40px;
  margin: 0 auto 20px;
  opacity: 0.25;
  display: block;
}

.upload-title {
  font-family: var(--display);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.3px;
}

.upload-sub {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.7;
}

.upload-hint {
  margin-top: 28px;
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 1px;
}

/* ── APP SECTION ─────────────────────────────────────────────── */
#app {
  display: none;
}

/* ── IMAGE META BAR ──────────────────────────────────────────── */
.meta-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  margin-bottom: 20px;
  font-size: 11px;
  color: var(--muted);
}

.meta-bar strong {
  color: var(--ink);
  font-weight: 500;
}

.meta-sep { color: var(--border); }

.meta-bar .spacer { flex: 1; }

.btn-text {
  background: none;
  border: none;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 0;
}
.btn-text:hover { color: var(--ink); }

/* ── TWO COLUMN ──────────────────────────────────────────────── */
.two-col {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 24px;
  align-items: start;
}

/* ── LEFT PANEL ──────────────────────────────────────────────── */
.left-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.preview-box {
  border: 1px solid var(--border);
  overflow: hidden;
  background: #111;
  aspect-ratio: 4/3;
}

.preview-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ── CONTROLS BOX ────────────────────────────────────────────── */
.controls-box {
  border: 1px solid var(--border);
  padding: 18px;
  background: var(--surface);
}

.controls-box .box-title {
  font-size: 9px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
  display: block;
}

.ctrl-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.ctrl-row:last-of-type { margin-bottom: 0; }

.ctrl-label {
  font-size: 11px;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ctrl-label small {
  font-size: 9px;
  color: var(--muted);
}

.ctrl-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ctrl-val {
  font-size: 13px;
  font-weight: 500;
  min-width: 20px;
  text-align: right;
  color: var(--accent);
}

input[type=range] {
  -webkit-appearance: none;
  width: 80px;
  height: 2px;
  background: var(--border);
  outline: none;
  cursor: pointer;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--ink);
  cursor: pointer;
  transition: background 0.1s;
}

input[type=range]::-webkit-slider-thumb:hover {
  background: var(--accent);
}

.btn-primary {
  width: 100%;
  margin-top: 18px;
  padding: 11px;
  background: var(--ink);
  color: var(--bg);
  border: none;
  font-family: var(--display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-primary:hover    { background: var(--accent); }
.btn-primary:disabled { opacity: 0.3; cursor: not-allowed; }

/* ── RIGHT PANEL ─────────────────────────────────────────────── */
.right-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ── TABS ────────────────────────────────────────────────────── */
.tabs {
  display: flex;
  border-bottom: 1.5px solid var(--ink);
  gap: 0;
}

.tab-btn {
  background: none;
  border: none;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  padding: 8px 16px 9px;
  cursor: pointer;
  position: relative;
  transition: color 0.1s;
}

.tab-btn:hover { color: var(--ink); }

.tab-btn.active {
  color: var(--ink);
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -1.5px;
  left: 0;
  right: 0;
  height: 1.5px;
  background: var(--bg);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── GRADIENT BAR ────────────────────────────────────────────── */
#gradient-bar {
  display: none;
  height: 48px;
  border: 1px solid var(--border);
  overflow: hidden;
  cursor: pointer;
}

.bar-swatch {
  height: 100%;
  transition: flex 0.25s ease;
}
.bar-swatch:hover { filter: brightness(1.08); }

/* ── SORT ROW ────────────────────────────────────────────────── */
.sort-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 14px;
}

.sort-label {
  font-size: 9px;
  letter-spacing: 2px;
  color: var(--muted);
  text-transform: uppercase;
  margin-right: 4px;
}

.sort-btn {
  background: none;
  border: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
  padding: 4px 10px;
  cursor: pointer;
  transition: all 0.1s;
}

.sort-btn:hover  { border-color: var(--ink); color: var(--ink); }
.sort-btn.active { border-color: var(--ink); color: var(--ink); background: var(--ink); color: var(--bg); }

/* ── PALETTE GRID ────────────────────────────────────────────── */
#palette-grid {
  display: none;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
}

/* ── COLOR CARD ──────────────────────────────────────────────── */
.color-card {
  border: 1px solid var(--border);
  background: #fff;
  overflow: hidden;
  transition: transform 0.15s, box-shadow 0.15s;
  animation: fadeUp var(--delay, 0ms) both 0.2s;
  cursor: default;
}

.color-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

@keyframes fadeUp {
  from { opacity:0; transform: translateY(8px); }
  to   { opacity:1; transform: translateY(0); }
}

.card-top {
  height: 90px;
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 8px;
}

.copy-btn {
  background: rgba(0,0,0,0.1);
  border: none;
  padding: 5px;
  cursor: pointer;
  display: flex;
  border-radius: 2px;
  opacity: 0;
  transition: opacity 0.1s;
}

.color-card:hover .copy-btn { opacity: 1; }

.pct-badge {
  font-size: 9px;
  letter-spacing: 1px;
  border: 1px solid currentColor;
  padding: 2px 5px;
  border-radius: 2px;
  opacity: 0.7;
  font-family: var(--mono);
}

.card-bottom {
  padding: 10px 10px 8px;
}

.color-hex {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.color-meta {
  display: flex;
  flex-direction: column;
  gap: 1px;
  font-size: 9px;
  color: var(--muted);
  margin-bottom: 8px;
}

.color-actions {
  display: flex;
  gap: 4px;
}

.chip-btn {
  background: none;
  border: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 1px;
  color: var(--muted);
  padding: 2px 6px;
  cursor: pointer;
  transition: all 0.1s;
}

.chip-btn:hover {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}

/* ── LOADING ─────────────────────────────────────────────────── */
#loading {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 20px 0;
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--muted);
  text-transform: uppercase;
}

.spinner {
  width: 14px;
  height: 14px;
  border: 1.5px solid var(--border);
  border-top-color: var(--ink);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── EXPORT PANEL ────────────────────────────────────────────── */
.export-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.exp-btn {
  background: none;
  border: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
  padding: 5px 10px;
  cursor: pointer;
  transition: all 0.1s;
}

.exp-btn:hover  { border-color: var(--ink); color: var(--ink); }
.exp-btn.active { background: var(--ink); color: var(--bg); border-color: var(--ink); }

.code-block {
  background: #1a1814;
  color: #c8c4b8;
  font-size: 11px;
  line-height: 1.7;
  padding: 18px;
  overflow: auto;
  max-height: 220px;
  white-space: pre;
  border: 1px solid var(--ink);
}

.export-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.btn-outline {
  background: none;
  border: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink);
  padding: 8px 14px;
  cursor: pointer;
  transition: all 0.1s;
}

.btn-outline:hover { background: var(--ink); color: var(--bg); }

/* ── HISTORY PANEL ───────────────────────────────────────────── */
.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.history-header span {
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
}

#history-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 340px;
  overflow-y: auto;
}

.history-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
  transition: border-color 0.1s;
}

.history-item:hover { border-color: var(--ink); }

.h-thumb {
  width: 48px;
  height: 36px;
  object-fit: cover;
  flex-shrink: 0;
  display: block;
}

.h-info {
  flex: 1;
  min-width: 0;
}

.h-name {
  font-size: 11px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
}

.h-swatches {
  display: flex;
  gap: 3px;
}

.h-swatch {
  width: 16px;
  height: 10px;
  display: inline-block;
}

.h-date {
  font-size: 9px;
  color: var(--muted);
  margin-top: 3px;
}

.h-del {
  background: none;
  border: none;
  font-size: 16px;
  color: var(--muted);
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
  flex-shrink: 0;
}

.h-del:hover { color: var(--accent); }

.empty-msg {
  font-size: 11px;
  color: var(--muted);
  font-style: italic;
  padding: 16px 0;
}

/* ── RERUN BTN ───────────────────────────────────────────────── */
.btn-rerun {
  background: none;
  border: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  padding: 7px 12px;
  cursor: pointer;
  transition: all 0.1s;
  width: 100%;
  margin-top: 8px;
}

.btn-rerun:hover { border-color: var(--ink); color: var(--ink); }
.btn-rerun:disabled { opacity: 0.3; }

/* ── TOAST ───────────────────────────────────────────────────── */
#toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: var(--ink);
  color: var(--bg);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 2px;
  padding: 9px 18px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 1000;
  white-space: nowrap;
}

#toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

#toast.error { background: var(--accent); }

/* ── FOOTER ──────────────────────────────────────────────────── */
footer {
  margin-top: 60px;
  padding: 20px 0;
  border-top: 1px solid var(--border);
  font-size: 10px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  letter-spacing: 1px;
}

/* ── RESPONSIVE ──────────────────────────────────────────────── */
@media (max-width: 700px) {
  .two-col {
    grid-template-columns: 1fr;
  }
}