/* ============================================
   Animation Curves Library — Styles
   Theme: Dark mode, glassmorphism, premium
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #6C5CE7;
  --primary-light: #a29bfe;
  --secondary: #A29BFE;
  --accent: #00CEC9;
  --bg: #0B0E11;
  --bg-card: rgba(255,255,255,0.04);
  --bg-glass: rgba(255,255,255,0.06);
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.16);
  --text: #E8E8E8;
  --text-dim: #9CA3AF;
  --text-muted: #6B7280;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --transition: 250ms ease;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* --- Header --- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(11,14,17,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.header__inner {
  max-width: 1400px; margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap;
}
.header__brand { display: flex; align-items: center; gap: 0.6rem; }
.header__icon { font-size: 1.4rem; }
.header__title { font-size: 1.2rem; font-weight: 700; letter-spacing: -0.02em; }
.header__badge {
  font-size: 0.65rem; font-weight: 600; text-transform: uppercase;
  background: var(--primary); color: #fff;
  padding: 0.15rem 0.5rem; border-radius: 999px;
  letter-spacing: 0.05em;
}
.header__actions { display: flex; gap: 0.5rem; }

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  border: none; cursor: pointer; font-family: var(--font);
  font-size: 0.85rem; font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
}
.btn:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}
.btn--ghost {
  background: var(--bg-glass); color: var(--text-dim);
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--border);
}
.btn--ghost:hover { background: rgba(255,255,255,0.1); color: var(--text); border-color: var(--border-hover); }
.btn--ghost.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn--accent {
  background: var(--accent); color: #0B0E11;
  padding: 0.5rem 1rem; font-weight: 600;
}
.btn--accent:hover { filter: brightness(1.15); transform: translateY(-1px); }
.btn--icon { background: none; color: var(--text-dim); padding: 0.4rem; border: none; }
.btn--icon:hover { color: var(--text); }
.btn--sm { font-size: 0.78rem; padding: 0.35rem 0.7rem; }

/* --- Toolbar --- */
.toolbar {
  max-width: 1400px; margin: 0 auto;
  padding: 1.25rem 1.5rem 0;
  display: flex; flex-direction: column; gap: 0.85rem;
}
.search-box {
  position: relative; width: 100%;
}
.search-box__icon {
  position: absolute; left: 1rem; top: 50%; transform: translateY(-50%);
  color: var(--text-muted); pointer-events: none;
}
.search-box__input {
  width: 100%; padding: 0.7rem 1rem 0.7rem 2.8rem;
  background: var(--bg-glass); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text);
  font-family: var(--font); font-size: 0.9rem;
  transition: all var(--transition);
}
.search-box__input::placeholder { color: var(--text-muted); }
.search-box__input:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108,92,231,0.15);
}

.toolbar__filters {
  display: flex; flex-wrap: wrap; gap: 0.4rem;
  overflow-x: auto; scrollbar-width: none;
  -ms-overflow-style: none;
}
.toolbar__filters::-webkit-scrollbar { display: none; }

.chip {
  padding: 0.35rem 0.75rem; border-radius: 999px;
  font-size: 0.78rem; font-weight: 500; font-family: var(--font);
  background: var(--bg-glass); color: var(--text-dim);
  border: 1px solid var(--border); cursor: pointer;
  transition: all var(--transition); white-space: nowrap;
}
.chip:hover { background: rgba(255,255,255,0.1); color: var(--text); }
.chip--active, .chip.active {
  background: var(--primary); color: #fff;
  border-color: var(--primary);
}

.toolbar__options {
  display: flex; gap: 1rem; flex-wrap: wrap; align-items: center;
}
.option-group { display: flex; align-items: center; gap: 0.5rem; font-size: 0.8rem; color: var(--text-dim); }
.option-group__label { font-weight: 500; }
.select {
  padding: 0.35rem 0.6rem; border-radius: var(--radius-xs);
  background: var(--bg-glass); border: 1px solid var(--border);
  color: var(--text); font-family: var(--font); font-size: 0.8rem;
  cursor: pointer; transition: all var(--transition);
}
.select:focus { outline: none; border-color: var(--primary); }

/* --- Curves Grid --- */
.curves-grid {
  max-width: 1400px; margin: 0 auto;
  padding: 1.25rem 1.5rem 3rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

/* --- Curve Card --- */
.curve-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.curve-card::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(108,92,231,0.05), transparent);
  opacity: 0; transition: opacity var(--transition);
}
.curve-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.curve-card:hover::before { opacity: 1; }
.curve-card:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}
.curve-card.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(0,206,201,0.2);
}
.curve-card__header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 0.75rem; position: relative; z-index: 1;
}
.curve-card__name { font-size: 0.82rem; font-weight: 600; color: var(--text); }
.curve-card__fav {
  background: none; border: none; cursor: pointer;
  color: var(--text-muted); padding: 0.2rem;
  transition: color var(--transition);
}
.curve-card__fav:hover, .curve-card__fav.active { color: #ff6b6b; }
.curve-card__fav.active svg { fill: #ff6b6b; }

.curve-card__canvas {
  width: 100%; height: 100px;
  border-radius: var(--radius-xs);
  background: rgba(0,0,0,0.2);
  margin-bottom: 0.6rem; position: relative; z-index: 1;
}
.curve-card__preview {
  position: relative; height: 8px;
  background: rgba(255,255,255,0.06);
  border-radius: 999px; overflow: hidden; z-index: 1;
}
.curve-card__ball {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent); left: 0;
}
.curve-card__badge {
  font-size: 0.65rem; color: var(--text-muted);
  margin-top: 0.5rem; position: relative; z-index: 1;
}

/* --- Compare Panel --- */
.compare-panel {
  max-width: 1400px; margin: 1rem auto 0;
  padding: 0 1.5rem;
}
.compare-panel__header {
  display: flex; align-items: center; gap: 0.75rem;
  flex-wrap: wrap; margin-bottom: 0.75rem;
}
.compare-panel__title { font-size: 1rem; font-weight: 600; }
.compare-panel__count { font-size: 0.8rem; color: var(--text-dim); flex: 1; }
.compare-panel__tracks {
  display: flex; flex-direction: column; gap: 0.5rem;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1rem;
  min-height: 60px;
}
.compare-track {
  display: flex; align-items: center; gap: 0.75rem;
}
.compare-track__label {
  font-size: 0.78rem; font-weight: 500; color: var(--text-dim);
  width: 140px; flex-shrink: 0;
}
.compare-track__bar {
  flex: 1; height: 6px;
  background: rgba(255,255,255,0.06);
  border-radius: 999px; position: relative; overflow: hidden;
}
.compare-track__dot {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 10px; height: 10px; border-radius: 50%;
  left: 0;
}

/* --- Empty State --- */
.empty-state {
  text-align: center; padding: 4rem 2rem;
  max-width: 1400px; margin: 0 auto;
}
.empty-state__icon { font-size: 3rem; display: block; margin-bottom: 1rem; }
.empty-state__text { color: var(--text-dim); font-size: 1rem; }

/* --- Modal --- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  padding: 1.5rem;
}
.modal-overlay[hidden] { display: none; }
.modal {
  background: #14181D;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 650px; width: 100%;
  max-height: 90vh; overflow-y: auto;
  box-shadow: var(--shadow-lg);
  padding: 0; color: var(--text);
}
.modal__header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--border);
}
.modal__title { font-size: 1.1rem; font-weight: 700; }
.modal__header-actions { display: flex; gap: 0.3rem; }

.modal__body { padding: 1.5rem; display: flex; flex-direction: column; gap: 1.25rem; }

.modal__preview {
  display: flex; flex-direction: column; gap: 1rem; align-items: center;
}
.modal__canvas {
  background: rgba(0,0,0,0.3);
  border-radius: var(--radius-sm);
  max-width: 100%;
}
.modal__demo { display: flex; align-items: center; gap: 1rem; width: 100%; }
.modal__demo-track {
  flex: 1; height: 10px; border-radius: 999px;
  background: rgba(255,255,255,0.06); position: relative; overflow: hidden;
}
.modal__demo-ball {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent); left: 0;
  box-shadow: 0 0 12px rgba(0,206,201,0.4);
}

.modal__details { display: flex; flex-direction: column; gap: 0.85rem; }

.modal__code-block {
  background: rgba(0,0,0,0.25);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.modal__code-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.5rem 0.85rem;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--border);
}
.modal__code-label {
  font-size: 0.72rem; font-weight: 600; text-transform: uppercase;
  color: var(--primary-light); letter-spacing: 0.06em;
}
.modal__code {
  padding: 0.75rem 0.85rem;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.8rem; line-height: 1.5;
  color: var(--accent); white-space: pre-wrap;
  word-break: break-all;
}

.modal__meta { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.modal__meta-tag {
  font-size: 0.7rem; font-weight: 500;
  padding: 0.25rem 0.6rem; border-radius: 999px;
  background: var(--bg-glass); color: var(--text-dim);
  border: 1px solid var(--border);
  text-transform: capitalize;
}

/* --- Editor --- */
.editor {
  padding: 1rem 1.5rem 1.5rem;
  border-top: 1px solid var(--border);
}
.editor__title { font-size: 0.9rem; font-weight: 600; margin-bottom: 0.75rem; }
.editor__controls { display: grid; grid-template-columns: 1fr 1fr; gap: 0.65rem; }
.editor__label {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.78rem; color: var(--text-dim); font-weight: 500;
}
.editor__slider {
  flex: 1;
  -webkit-appearance: none; appearance: none;
  height: 4px; background: var(--border); border-radius: 999px;
  outline: none; cursor: pointer;
}
.editor__slider::-webkit-slider-thumb {
  -webkit-appearance: none; width: 14px; height: 14px;
  border-radius: 50%; background: var(--primary); cursor: pointer;
  border: 2px solid var(--bg);
}
.editor__slider:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.editor__val {
  font-family: monospace; font-size: 0.75rem;
  color: var(--accent); width: 3ch; text-align: right;
}

/* --- Toast --- */
.toast {
  position: fixed; bottom: 1.5rem; left: 50%; transform: translateX(-50%);
  background: var(--primary); color: #fff;
  padding: 0.6rem 1.25rem; border-radius: var(--radius);
  font-size: 0.85rem; font-weight: 500;
  box-shadow: var(--shadow); z-index: 500;
  animation: toastIn 300ms ease;
}
.toast[hidden] { display: none; }
@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .header__inner { padding: 0.6rem 1rem; }
  .btn__label { display: none; }
  .toolbar { padding: 1rem 1rem 0; }
  .curves-grid { padding: 1rem; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 0.75rem; }
  .curve-card { padding: 0.75rem; }
  .curve-card__canvas { height: 70px; }
  .modal { max-width: 95vw; }
  .modal__body { padding: 1rem; }
  .editor__controls { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .curves-grid { grid-template-columns: 1fr 1fr; }
  .toolbar__options { flex-direction: column; align-items: flex-start; }
}

/* --- Animations --- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.curve-card { animation: fadeIn 300ms ease backwards; }

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

/* --- Focus visible global --- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}