:root {
  --bg-dark: #070a12;
  --bg-gradient: radial-gradient(circle at 50% 0%, #152238 0%, #070a12 70%);
  --card-bg: rgba(18, 26, 43, 0.65);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-hover-border: rgba(16, 185, 129, 0.4);
  --accent-emerald: #10b981;
  --accent-cyan: #06b6d4;
  --accent-violet: #8b5cf6;
  --accent-amber: #f59e0b;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --glass-glow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-dark);
  background-image: var(--bg-gradient);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 16px;
  line-height: 1.5;
}

.container {
  width: 100%;
  max-width: 1120px;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding: 16px 24px;
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  box-shadow: var(--glass-glow);
}

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

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent-emerald), var(--accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.brand h1 {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #ffffff 30%, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand p {
  font-size: 13px;
  color: var(--text-muted);
}

.badge-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  color: var(--accent-emerald);
  font-size: 12px;
  font-weight: 600;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.2); }
}

/* Grid Layout */
.app-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 20px;
}

@media (max-width: 900px) {
  .app-grid {
    grid-template-columns: 1fr;
  }
}

/* Card Panels */
.panel {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--glass-glow);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.panel-title {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Form & Controls */
.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
}

select, input[type="number"], input[type="text"] {
  width: 100%;
  padding: 10px 12px;
  background: rgba(10, 15, 26, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  color: var(--text-main);
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition: all 0.2s ease;
}

select:focus, input:focus {
  border-color: var(--accent-emerald);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

/* Buttons */
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  padding: 11px 18px;
  border-radius: 10px;
  font-family: inherit;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-emerald), #059669);
  color: #022c22;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(16, 185, 129, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-main);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-icon {
  padding: 8px 12px;
  font-size: 14px;
}

/* Word Card Highlight */
.word-display-box {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03) 0%, rgba(255, 255, 255, 0.01) 100%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 28px 16px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.word-display-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-emerald), transparent);
}

.big-word {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, #ffffff 40%, var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.word-meta-badges {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 6px;
}

.chip-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
}

/* List Items */
.list-box {
  max-height: 280px;
  overflow-y: auto;
  border-radius: 12px;
  background: rgba(10, 15, 26, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.05);
  padding: 6px;
}

.list-box::-webkit-scrollbar {
  width: 6px;
}

.list-box::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 6px;
}

.word-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 4px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.word-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.08);
}

.word-item-info strong {
  font-size: 15px;
  color: var(--text-main);
}

.word-item-info small {
  font-size: 12px;
  color: var(--text-muted);
}

.fav-star {
  background: transparent;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--text-muted);
  transition: transform 0.2s ease, color 0.2s ease;
}

.fav-star.active {
  color: var(--accent-amber);
  text-shadow: 0 0 10px rgba(245, 158, 11, 0.4);
}

.fav-star:hover {
  transform: scale(1.2);
}

/* Timer section */
.timer-card {
  background: rgba(139, 92, 246, 0.08);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: 12px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.timer-display {
  font-family: 'JetBrains Mono', monospace;
  font-size: 28px;
  font-weight: 700;
  color: var(--accent-violet);
  text-align: center;
}

.timer-progress {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
}

.timer-bar {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--accent-violet), var(--accent-cyan));
  transition: width 1s linear;
}

/* Toast Notification */
#toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: rgba(18, 26, 43, 0.95);
  border: 1px solid var(--accent-emerald);
  color: var(--text-main);
  padding: 12px 20px;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  font-weight: 500;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 9999;
}

#toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Shortcut Bar */
.shortcuts-bar {
  margin-top: 20px;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.shortcut-tag {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

kbd {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-main);
}

footer {
  margin-top: 28px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  padding: 12px;
}

footer a {
  color: var(--accent-emerald);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}