/* ============================================================
   Asset Forge — styles
   Dark studio theme for a creator tool
   ============================================================ */
:root {
  --bg: #0f1117;
  --bg-panel: #161923;
  --bg-elev: #1c2030;
  --bg-hover: #232840;
  --border: #2a2f45;
  --text: #e6e9f5;
  --text-dim: #9aa1ba;
  --accent: #6c7cff;
  --accent-2: #a78bfa;
  --accent-grad: linear-gradient(135deg, #6c7cff 0%, #a78bfa 100%);
  --danger: #f472b6;
  --ok: #34d399;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(108, 124, 255, 0.12), transparent 60%),
    radial-gradient(1000px 500px at 100% 0%, rgba(167, 139, 250, 0.10), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
}

.hidden { display: none !important; }

/* ---------- Header ---------- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(22, 25, 35, 0.6);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  font-size: 30px;
  line-height: 1;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 12px rgba(108, 124, 255, 0.5));
}
.brand h1 { margin: 0; font-size: 20px; letter-spacing: 0.3px; }
.brand .tagline { margin: 0; font-size: 12.5px; color: var(--text-dim); }

.header-actions { display: flex; align-items: center; gap: 10px; }
.auth-user { font-size: 13px; color: var(--ok); }

/* ---------- Buttons ---------- */
.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  cursor: pointer;
  transition: transform 0.08s ease, background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  font-family: inherit;
}
.btn:hover:not(:disabled) { background: var(--bg-hover); border-color: var(--accent); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-primary {
  background: var(--accent-grad);
  border: none;
  color: #fff;
  font-weight: 600;
  box-shadow: 0 6px 18px rgba(108, 124, 255, 0.35);
}
.btn-primary:hover:not(:disabled) { filter: brightness(1.08); border: none; }

.btn-outline { background: transparent; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--text-dim); }
.btn-ghost:hover { color: var(--danger); background: rgba(244, 114, 182, 0.08); }

.btn-lg { padding: 12px 20px; font-size: 15px; border-radius: 10px; }

.btn-row { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- Tabs ---------- */
.tabs {
  display: flex;
  gap: 6px;
  padding: 12px 28px 0;
}
.tab-btn {
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-dim);
  padding: 10px 18px;
  border-radius: 10px 10px 0 0;
  font-size: 14.5px;
  cursor: pointer;
  font-family: inherit;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active {
  color: var(--text);
  background: var(--bg-panel);
  border-color: var(--border);
  border-bottom: 2px solid var(--accent);
}

/* ---------- Panels ---------- */
.panels { padding: 0 28px; flex: 1; }
.panel { display: none; }
.panel.active { display: block; animation: fadeIn 0.18s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

#panel-generator { display: flex; gap: 20px; }
#panel-generator.active { display: flex; }
.panel { background: var(--bg-panel); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }

.split-layout { display: flex; gap: 20px; }

/* ---------- Controls sidebar ---------- */
.controls { width: 300px; flex-shrink: 0; }
.section-title { margin: 0 0 14px; font-size: 15px; letter-spacing: 0.3px; color: var(--text-dim); text-transform: uppercase; font-weight: 600; }
.fieldset { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px; margin-bottom: 12px; background: rgba(255, 255, 255, 0.02); }

.field { margin-bottom: 12px; }
.field:last-child { margin-bottom: 0; }
.field.inline { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.field.inline label { margin: 0; }

label { display: block; font-size: 12.5px; color: var(--text-dim); margin-bottom: 6px; }

input[type="text"],
input[type="number"],
select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 9px 11px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(108, 124, 255, 0.18); }

input[type="checkbox"] {
  width: 17px;
  height: 17px;
  accent-color: var(--accent);
  cursor: pointer;
}

input[type="color"] {
  width: 100%;
  height: 40px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px;
  cursor: pointer;
}

.hint { font-size: 12.5px; color: var(--text-dim); margin: 8px 0 0; }

/* ---------- AI Sprite Sheet generator ---------- */
.gen-layout { display: flex; gap: 20px; }

textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 9px 11px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  resize: vertical;
  min-height: 64px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(108, 124, 255, 0.18); }

.pose-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}
.pose-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
  margin: 0;
}
.pose-chip:hover { border-color: var(--accent); background: var(--bg-elev); }
.pose-chip input { margin: 0; }

.ai-result {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 340px;
}
.ai-result img {
  max-width: 100%;
  max-height: 420px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  background: var(--bg);
}
.ai-placeholder {
  color: var(--text-dim);
  text-align: center;
  font-size: 14px;
  line-height: 1.7;
}
.ai-loading { color: var(--accent); font-size: 14px; text-align: center; }
.ai-loading::after {
  content: '';
  display: inline-block;
  width: 12px;
  height: 12px;
  margin-left: 8px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  vertical-align: middle;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 860px) {
  .gen-layout { flex-direction: column; }
}

/* ---------- Stage / preview ---------- */
.stage { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 16px; }
.preview-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 360px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background:
    linear-gradient(45deg, rgba(255,255,255,0.03) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.03) 75%),
    linear-gradient(45deg, rgba(255,255,255,0.03) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.03) 75%);
  background-size: 20px 20px;
  background-position: 0 0, 10px 10px;
  padding: 16px;
}
.preview-wrap canvas {
  max-width: 100%;
  max-height: 420px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  background: var(--bg);
}
.preview-label { font-size: 12.5px; color: var(--text-dim); }
.actions { display: flex; gap: 12px; align-items: center; justify-content: center; flex-wrap: wrap; }

/* ---------- Split results ---------- */
.results-title { margin: 8px 0 0; font-size: 15px; color: var(--text); }
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(96px, 1fr));
  gap: 10px;
}
.result-grid .thumb {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  padding: 8px;
  text-align: center;
  overflow: hidden;
}
.result-grid .thumb img { width: 100%; height: auto; border-radius: 4px; image-rendering: pixelated; background: repeating-conic-gradient(#ffffff14 0% 25%, transparent 0% 50%) 50% / 12px 12px; }
.result-grid .thumb .thumb-name { font-size: 11px; color: var(--text-dim); margin-top: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ---------- Asset tray ---------- */
.tray-section {
  padding: 20px 28px 28px;
  max-width: none;
}
.tray-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.tray-head h2 { margin: 0; font-size: 16px; }
.tray-head .count {
  background: var(--accent-grad);
  color: #fff;
  font-size: 12px;
  border-radius: 999px;
  padding: 2px 10px;
  margin-left: 8px;
  vertical-align: middle;
}
.tray-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.tray {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(132px, 1fr));
  gap: 14px;
}
.tray-empty { grid-column: 1 / -1; color: var(--text-dim); font-size: 14px; text-align: center; padding: 30px 0; }

.asset-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
  transition: transform 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
  animation: fadeIn 0.2s ease;
}
.asset-card:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: var(--shadow); }

.asset-card .thumb-wrap {
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: repeating-conic-gradient(#ffffff10 0% 25%, transparent 0% 50%) 50% / 14px 14px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 8px;
}
.asset-card img { max-width: 100%; max-height: 100%; image-rendering: pixelated; }
.asset-card .asset-meta { font-size: 11.5px; color: var(--text-dim); }
.asset-card .asset-meta .name { color: var(--text); display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.asset-actions { display: flex; gap: 6px; margin-top: 8px; }
.asset-actions .btn { flex: 1; padding: 6px 4px; font-size: 12px; }

/* ---------- Footer ---------- */
.app-footer {
  padding: 16px 28px;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 13px;
  text-align: center;
}
.app-footer a { color: var(--accent); text-decoration: none; }
.app-footer a:hover { text-decoration: underline; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-elev);
  color: var(--text);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 100;
  max-width: min(90vw, 480px);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { border-left-color: var(--danger); }
.toast.success { border-left-color: var(--ok); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  #panel-generator, .split-layout { flex-direction: column; }
  .controls { width: 100%; }
  .tabs { padding: 10px 14px 0; }
  .panels { padding: 0 14px; }
  .app-header { padding: 14px 16px; }
  .tray-section { padding: 16px 14px 24px; }
  .app-footer { padding: 14px 16px; }
}