/* ===== Today Page — Daily Study Hub ===== */

/* Inherit base variables from style.css, extend with subject colors */
:root {
  --math-color: #3b82f6;
  --math-bg: rgba(59, 130, 246, 0.08);
  --math-border: rgba(59, 130, 246, 0.25);
  --english-color: #f59e0b;
  --english-bg: rgba(245, 158, 11, 0.08);
  --english-border: rgba(245, 158, 11, 0.25);
  --chemistry-color: #10b981;
  --chemistry-bg: rgba(16, 185, 129, 0.08);
  --chemistry-border: rgba(16, 185, 129, 0.25);
  --physics-color: #8b5cf6;
  --physics-bg: rgba(139, 92, 246, 0.08);
  --physics-border: rgba(139, 92, 246, 0.25);
  --complete-color: #4ade80;
  --complete-bg: rgba(74, 222, 128, 0.06);
}

/* ===== Page Layout ===== */
.today-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 100px;
}

/* ===== Top Bar ===== */
.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all 0.25s;
}

.back-link:hover {
  color: var(--accent);
  background: rgba(74, 222, 128, 0.08);
}

.week-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  background: rgba(255,255,255,0.04);
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid var(--border);
}

/* ===== Hero Section ===== */
.today-hero {
  text-align: center;
  margin-bottom: 32px;
  padding: 24px 0;
}

.today-date {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.today-weekday {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
  letter-spacing: -0.5px;
}

.today-motto {
  font-size: 1rem;
  color: var(--text-secondary);
  font-style: italic;
}

/* ===== Summary Stats ===== */
.summary-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  gap: 12px;
}

.summary-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.summary-stat .stat-value {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
}

.summary-stat .stat-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.summary-progress {
  flex: 1;
  margin: 0 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.summary-progress .progress-text {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-align: center;
}

.progress-track {
  width: 100%;
  height: 8px;
  background: rgba(255,255,255,0.06);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.progress-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--accent), #60a5fa);
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.progress-fill::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 20px; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3));
  border-radius: 4px;
}

/* ===== Task List ===== */
.task-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.task-list-header {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 2px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ===== Task Card ===== */
.task-card {
  position: relative;
  display: flex;
  align-items: stretch;
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  animation: slide-up 0.5s ease-out both;
}

.task-card:nth-child(1) { animation-delay: 0.05s; }
.task-card:nth-child(2) { animation-delay: 0.1s; }
.task-card:nth-child(3) { animation-delay: 0.15s; }
.task-card:nth-child(4) { animation-delay: 0.2s; }
.task-card:nth-child(5) { animation-delay: 0.25s; }

@keyframes slide-up {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Subject-specific coloring */
.task-card[data-subject="math"] {
  background: var(--math-bg);
  border: 1px solid var(--math-border);
}
.task-card[data-subject="english"] {
  background: var(--english-bg);
  border: 1px solid var(--english-border);
}
.task-card[data-subject="chemistry"] {
  background: var(--chemistry-bg);
  border: 1px solid var(--chemistry-border);
}
.task-card[data-subject="physics"] {
  background: var(--physics-bg);
  border: 1px solid var(--physics-border);
}

/* Completed state */
.task-card.completed {
  background: var(--complete-bg) !important;
  border-color: rgba(74, 222, 128, 0.2) !important;
  opacity: 0.65;
}

.task-card.completed .task-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

.task-card.completed .task-check {
  background: var(--complete-color);
  border-color: var(--complete-color);
}

.task-card.completed .task-check::after {
  content: '✓';
  color: #0a0e1a;
  font-size: 14px;
  font-weight: 700;
}

/* Hover on non-completed */
.task-card:not(.completed):hover {
  transform: translateX(4px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

/* Left accent bar */
.task-accent {
  width: 4px;
  flex-shrink: 0;
}

.task-card[data-subject="math"] .task-accent { background: var(--math-color); }
.task-card[data-subject="english"] .task-accent { background: var(--english-color); }
.task-card[data-subject="chemistry"] .task-accent { background: var(--chemistry-color); }
.task-card[data-subject="physics"] .task-accent { background: var(--physics-color); }
.task-card.completed .task-accent { background: var(--complete-color) !important; }

/* Task body */
.task-body {
  flex: 1;
  padding: 16px 16px 16px 14px;
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.task-check {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.2);
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s;
}

.task-check:hover {
  border-color: var(--accent);
  background: rgba(74, 222, 128, 0.1);
  transform: scale(1.1);
}

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

.task-info-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.task-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
}

.task-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: all 0.3s;
}

.task-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.task-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
}

.task-tag {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  letter-spacing: 0.3px;
}

.tag-new {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
}

.tag-review {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
}

.tag-test {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
}

.tag-preview {
  background: rgba(139, 92, 246, 0.15);
  color: #a78bfa;
}

.task-duration {
  font-size: 0.7rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 3px;
}

/* Task link button */
.task-go {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 1.2rem;
  transition: all 0.25s;
  flex-shrink: 0;
  border-left: 1px solid rgba(255,255,255,0.05);
}

.task-go:hover {
  color: var(--accent);
  background: rgba(74, 222, 128, 0.06);
}

.task-card.completed .task-go {
  pointer-events: none;
  opacity: 0.4;
}

/* ===== Completion Celebration ===== */
.celebration {
  display: none;
  text-align: center;
  padding: 40px 20px;
  animation: pop-in 0.5s cubic-bezier(0.68, -0.6, 0.32, 1.6);
}

.celebration.show {
  display: block;
}

@keyframes pop-in {
  from { opacity: 0; transform: scale(0.8); }
  to { opacity: 1; transform: scale(1); }
}

.celebration-icon {
  font-size: 4rem;
  margin-bottom: 12px;
}

.celebration-title {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #4ade80, #fbbf24);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.celebration-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ===== Day Navigation ===== */
.day-nav {
  display: flex;
  gap: 6px;
  justify-content: center;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.day-btn {
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.25s;
  font-family: var(--font-family);
}

.day-btn:hover {
  border-color: rgba(74, 222, 128, 0.3);
  color: var(--text-primary);
  background: rgba(74, 222, 128, 0.06);
}

.day-btn.active {
  background: linear-gradient(135deg, rgba(74, 222, 128, 0.15), rgba(96, 165, 250, 0.1));
  border-color: rgba(74, 222, 128, 0.4);
  color: var(--accent);
  font-weight: 600;
}

.day-btn.today-indicator {
  position: relative;
}

.day-btn.today-indicator::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
}

/* ===== Footer ===== */
.today-footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.today-footer a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.today-footer a:hover {
  color: var(--accent);
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .today-container {
    padding: 20px 14px 80px;
  }

  .today-weekday {
    font-size: 1.6rem;
  }

  .summary-bar {
    padding: 12px 14px;
    gap: 8px;
  }

  .summary-stat .stat-value {
    font-size: 1.1rem;
  }

  .summary-progress {
    margin: 0 8px;
  }

  .task-body {
    padding: 12px 12px 12px 10px;
    gap: 10px;
  }

  .task-title {
    font-size: 0.88rem;
  }

  .task-go {
    padding: 0 12px;
  }

  .day-nav {
    gap: 4px;
  }

  .day-btn {
    padding: 5px 10px;
    font-size: 0.72rem;
  }
}