/* ============================================
   CAPTIONCRAFT — STYLES
   Palette: Volcanic Glass (dark + orange)
   Font: Plus Jakarta Sans
============================================ */

:root {
  --bg-base:       #111111;
  --bg-surface:    #1A1A1A;
  --bg-elevated:   #222222;
  --bg-hover:      #2A2A2A;
  --border:        #2E2E2E;
  --border-light:  #383838;
  --text-primary:  #F0EDE8;
  --text-secondary:#A09A92;
  --text-muted:    #5A5550;
  --accent:        #FF6B2B;
  --accent-hover:  #FF8550;
  --accent-dim:    rgba(255,107,43,0.12);
  --accent-glow:   rgba(255,107,43,0.25);
  --success:       #4CAF82;
  --radius-sm:     6px;
  --radius-md:     10px;
  --radius-lg:     16px;
  --shadow-sm:     0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:     0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:     0 8px 32px rgba(0,0,0,0.6);
  --font:          'Plus Jakarta Sans', sans-serif;
  --transition:    0.18s ease;
}

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

html { scroll-behavior: smooth; }

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

/* Grain texture overlay */
.grain-overlay {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  opacity: 0.5;
}

/* ── HEADER ── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(17,17,17,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1200px; margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.1rem; font-weight: 600; letter-spacing: -0.02em;
}
.logo-icon {
  color: var(--accent); font-size: 1.3rem;
  animation: spin-slow 8s linear infinite;
}
@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
.logo-text strong { color: var(--accent); }
.header-nav { display: flex; gap: 8px; }
.nav-badge {
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(255,107,43,0.3);
  padding: 3px 10px; border-radius: 20px;
}

/* ── HERO ── */
.hero {
  position: relative; z-index: 1;
  padding: 64px 24px 48px;
  text-align: center;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(255,107,43,0.08) 0%, transparent 70%);
  border-bottom: 1px solid var(--border);
}
.hero-inner { max-width: 640px; margin: 0 auto; }
.hero-tag {
  display: inline-block;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(255,107,43,0.25);
  padding: 4px 14px; border-radius: 20px;
  margin-bottom: 20px;
  animation: fade-up 0.5s ease both;
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700; line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 16px;
  animation: fade-up 0.5s 0.1s ease both;
}
.hero-title em {
  font-style: italic; color: var(--accent);
  background: linear-gradient(135deg, #FF6B2B, #FFB088);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 1rem; color: var(--text-secondary); font-weight: 400;
  animation: fade-up 0.5s 0.2s ease both;
}
@keyframes fade-up {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── APP CONTAINER ── */
.app-container {
  position: relative; z-index: 1;
  max-width: 1200px; margin: 0 auto;
  padding: 32px 24px 48px;
}

/* ── CONTROLS BAR ── */
.controls-bar {
  display: flex; flex-wrap: wrap; gap: 20px; align-items: flex-end;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 24px;
  animation: fade-up 0.5s 0.3s ease both;
}
.control-group {
  display: flex; flex-direction: column; gap: 8px;
  flex: 1; min-width: 160px;
}
.control-label {
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--text-secondary);
}

/* Select */
.select-wrapper {
  position: relative; display: flex; align-items: center;
}
.control-select {
  width: 100%; appearance: none;
  background: var(--bg-elevated);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  font-family: var(--font); font-size: 0.875rem; font-weight: 500;
  padding: 9px 36px 9px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer; outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.control-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.control-select.small { padding: 7px 30px 7px 10px; font-size: 0.8rem; }
.select-arrow {
  position: absolute; right: 10px;
  color: var(--text-muted); font-size: 0.75rem; pointer-events: none;
}

/* Slider */
.control-slider {
  width: 100%; appearance: none;
  height: 4px; border-radius: 2px;
  background: var(--border-light);
  outline: none; cursor: pointer;
  accent-color: var(--accent);
}
.control-slider::-webkit-slider-thumb {
  appearance: none; width: 16px; height: 16px;
  border-radius: 50%; background: var(--accent);
  cursor: pointer; border: 2px solid var(--bg-base);
  box-shadow: 0 0 0 3px var(--accent-dim);
  transition: transform var(--transition);
}
.control-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }

/* Toggle */
.toggle-btn {
  background: none; border: none; cursor: pointer; padding: 0;
  display: flex; align-items: center;
}
.toggle-track {
  width: 44px; height: 24px; border-radius: 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-light);
  display: flex; align-items: center; padding: 2px;
  transition: background var(--transition), border-color var(--transition);
}
.toggle-thumb {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--text-muted);
  transition: transform var(--transition), background var(--transition);
}
.toggle-btn[aria-checked="true"] .toggle-track {
  background: var(--accent-dim); border-color: var(--accent);
}
.toggle-btn[aria-checked="true"] .toggle-thumb {
  transform: translateX(20px); background: var(--accent);
}

/* ── SPLIT PANEL ── */
.split-panel {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
  animation: fade-up 0.5s 0.4s ease both;
}
@media (max-width: 768px) {
  .split-panel { grid-template-columns: 1fr; }
}

/* ── PANEL ── */
.panel {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex; flex-direction: column;
  overflow: hidden;
  transition: border-color var(--transition);
}
.panel:focus-within { border-color: var(--border-light); }

.panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}
.panel-label {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-secondary);
}
.panel-actions { display: flex; gap: 6px; }

.action-btn {
  display: flex; align-items: center; gap: 5px;
  background: var(--bg-hover); border: 1px solid var(--border-light);
  color: var(--text-secondary); font-family: var(--font);
  font-size: 0.75rem; font-weight: 500;
  padding: 5px 10px; border-radius: var(--radius-sm);
  cursor: pointer; transition: all var(--transition);
}
.action-btn:hover:not(:disabled) {
  background: var(--border-light); color: var(--text-primary);
  border-color: var(--text-muted);
}
.action-btn:disabled { opacity: 0.35; cursor: not-allowed; }

/* Textarea */
.text-area {
  flex: 1; min-height: 320px; resize: none;
  background: transparent; border: none; outline: none;
  color: var(--text-primary); font-family: var(--font);
  font-size: 0.9rem; line-height: 1.7; font-weight: 400;
  padding: 18px; caret-color: var(--accent);
}
.text-area::placeholder { color: var(--text-muted); }

/* Panel footer */
.panel-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 18px;
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
  gap: 12px; flex-wrap: wrap;
}
.char-count {
  font-size: 0.72rem; color: var(--text-muted); font-weight: 500;
}

/* Generate button */
.generate-btn {
  display: flex; align-items: center; gap: 7px;
  background: var(--accent);
  color: #fff; font-family: var(--font);
  font-size: 0.875rem; font-weight: 700;
  padding: 9px 20px; border-radius: var(--radius-sm);
  border: none; cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 2px 12px var(--accent-glow);
  white-space: nowrap;
}
.generate-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--accent-glow);
}
.generate-btn:active { transform: translateY(0); }
.generate-btn.loading { opacity: 0.7; pointer-events: none; }

/* ── OUTPUT AREA ── */
.output-area {
  flex: 1; min-height: 320px; overflow-y: auto;
  padding: 12px;
  scrollbar-width: thin; scrollbar-color: var(--border-light) transparent;
}
.output-area::-webkit-scrollbar { width: 4px; }
.output-area::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 2px; }

/* Empty state */
.empty-state {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; height: 100%; min-height: 280px;
  gap: 10px; text-align: center;
}
.empty-icon {
  font-size: 2.5rem; color: var(--text-muted);
  animation: pulse 3s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50%       { opacity: 0.6; transform: scale(1.05); }
}
.empty-title { font-size: 0.95rem; font-weight: 600; color: var(--text-secondary); }
.empty-sub   { font-size: 0.8rem; color: var(--text-muted); }

/* Caption cards */
.caption-cards { display: flex; flex-direction: column; gap: 6px; }

.caption-card {
  display: flex; align-items: flex-start; gap: 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  cursor: pointer;
  transition: all var(--transition);
  animation: card-in 0.25s ease both;
}
.caption-card:hover {
  border-color: var(--accent);
  background: var(--bg-hover);
  transform: translateX(2px);
}
@keyframes card-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.card-index {
  font-size: 0.65rem; font-weight: 700; color: var(--accent);
  background: var(--accent-dim); border-radius: 4px;
  padding: 2px 6px; min-width: 28px; text-align: center;
  margin-top: 2px; flex-shrink: 0;
}
.card-text {
  font-size: 0.875rem; line-height: 1.55; color: var(--text-primary);
  font-weight: 400; flex: 1;
}
.card-time {
  font-size: 0.65rem; color: var(--text-muted);
  font-family: 'Courier New', monospace;
  white-space: nowrap; margin-top: 3px; flex-shrink: 0;
}

/* Output footer */
.output-footer { gap: 10px; }
.caption-count {
  font-size: 0.72rem; color: var(--text-muted); font-weight: 500;
}
.download-group { display: flex; align-items: center; gap: 8px; }

/* Download button */
.download-btn {
  display: flex; align-items: center; gap: 7px;
  background: var(--bg-hover);
  border: 1px solid var(--border-light);
  color: var(--text-primary); font-family: var(--font);
  font-size: 0.875rem; font-weight: 600;
  padding: 8px 16px; border-radius: var(--radius-sm);
  cursor: pointer; transition: all var(--transition);
  white-space: nowrap;
}
.download-btn:hover:not(:disabled) {
  background: var(--accent); border-color: var(--accent);
  color: #fff; box-shadow: 0 2px 12px var(--accent-glow);
  transform: translateY(-1px);
}
.download-btn:active:not(:disabled) { transform: translateY(0); }
.download-btn:disabled { opacity: 0.35; cursor: not-allowed; }

/* ── STATS BAR ── */
.stats-bar {
  display: flex; flex-wrap: wrap; gap: 12px;
  margin-top: 20px; padding: 16px 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  animation: fade-up 0.4s ease both;
}
.stats-bar:empty { display: none; }
.stat-item {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.8rem; color: var(--text-secondary);
}
.stat-item strong { color: var(--accent); font-weight: 700; }
.stat-divider { color: var(--border-light); }

/* ── TOAST ── */
.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--bg-elevated);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  font-size: 0.85rem; font-weight: 500;
  padding: 10px 20px; border-radius: 30px;
  box-shadow: var(--shadow-lg);
  opacity: 0; pointer-events: none;
  transition: all 0.25s ease;
  z-index: 999; white-space: nowrap;
}
.toast.show {
  opacity: 1; transform: translateX(-50%) translateY(0);
}
.toast.success { border-color: var(--success); color: var(--success); }
.toast.error   { border-color: #e05555; color: #e05555; }

/* ── FOOTER ── */
.site-footer {
  position: relative; z-index: 1;
  text-align: center; padding: 24px;
  border-top: 1px solid var(--border);
  font-size: 0.78rem; color: var(--text-muted);
}

/* ── RESPONSIVE ── */
@media (max-width: 600px) {
  .controls-bar { padding: 16px; gap: 14px; }
  .control-group { min-width: 140px; }
  .hero { padding: 40px 16px 32px; }
  .app-container { padding: 20px 16px 40px; }
  .panel-footer { flex-direction: column; align-items: stretch; }
  .generate-btn, .download-btn { width: 100%; justify-content: center; }
  .download-group { justify-content: space-between; }
  .header-nav { display: none; }
}