/* App-specific styles — extends theme.css tokens */

/* NAV */
.app-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: rgba(10, 14, 26, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  z-index: 100;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-brand:hover { color: var(--accent); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--fg-muted);
}

/* SCREEN SYSTEM */
.screen {
  min-height: 100vh;
  padding-top: 60px;
}

/* UPLOAD SCREEN */
.upload-wrap {
  max-width: 700px;
  margin: 0 auto;
  padding: 80px 32px 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.upload-badge {
  display: inline-block;
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 100px;
  border: 1px solid var(--accent-glow);
  margin-bottom: 28px;
}

.upload-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.upload-sub {
  color: var(--fg-muted);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 48px;
  max-width: 560px;
}

.drop-zone {
  width: 100%;
  border: 2px dashed rgba(74, 222, 128, 0.25);
  border-radius: 20px;
  padding: 56px 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  background: var(--accent-dim);
  transition: border-color 0.2s, background 0.2s;
  cursor: pointer;
}

.drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(74, 222, 128, 0.12);
}

.drop-icon { font-size: 3rem; }

.drop-text {
  font-size: 1.05rem;
  color: var(--fg);
  font-weight: 500;
}

.drop-or {
  font-size: 0.85rem;
  color: var(--fg-muted);
}

.drop-hint {
  font-size: 0.8rem;
  color: var(--fg-muted);
  margin-top: 4px;
}

/* BUTTONS */
.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #0a0e1a;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 12px 28px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  letter-spacing: 0.2px;
  transition: opacity 0.15s;
}

.btn-primary:hover { opacity: 0.88; }

.btn-secondary {
  display: block;
  width: 100%;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--fg-muted);
  font-family: var(--font-body);
  font-size: 0.85rem;
  padding: 10px;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 16px;
  transition: border-color 0.15s, color 0.15s;
}

.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.btn-ghost {
  background: transparent;
  border: 1px solid rgba(74, 222, 128, 0.3);
  color: var(--accent);
  font-family: var(--font-body);
  font-size: 0.8rem;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-ghost:hover { background: var(--accent-dim); }

.btn-icon {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--fg-muted);
  font-size: 1.2rem;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s, color 0.15s;
}

.btn-icon:hover { border-color: var(--accent); color: var(--accent); }

.error-banner {
  margin-top: 20px;
  background: var(--red-dim);
  border: 1px solid rgba(248,113,113,0.2);
  color: var(--red-muted);
  padding: 14px 20px;
  border-radius: 10px;
  font-size: 0.9rem;
  text-align: left;
  width: 100%;
}

/* PROCESSING SCREEN */
.processing-wrap {
  max-width: 560px;
  margin: 0 auto;
  padding: 120px 32px;
  text-align: center;
}

.processing-icon { font-size: 3.5rem; margin-bottom: 24px; }

.processing-title {
  font-family: var(--font-display);
  font-size: 1.9rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.processing-sub {
  color: var(--fg-muted);
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 40px;
}

.progress-bar {
  height: 4px;
  background: rgba(255,255,255,0.08);
  border-radius: 100px;
  overflow: hidden;
  margin-bottom: 32px;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 100px;
  width: 0%;
  transition: width 0.6s ease;
}

.processing-steps {
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: left;
}

.pstep {
  font-size: 0.9rem;
  color: var(--fg-muted);
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  transition: color 0.3s, border-color 0.3s;
}

.pstep.active {
  color: var(--accent);
  border-color: var(--accent-glow);
}

.pstep.done {
  color: var(--fg);
  border-color: rgba(255,255,255,0.08);
}

/* CALENDAR LAYOUT */
.cal-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: calc(100vh - 60px);
}

.cal-sidebar {
  background: var(--bg-card);
  border-right: 1px solid rgba(255,255,255,0.06);
  padding: 28px 24px;
  overflow-y: auto;
  position: sticky;
  top: 60px;
  height: calc(100vh - 60px);
}

.sidebar-course {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 20px;
  line-height: 1.35;
}

.sidebar-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 28px;
}

.stat-chip {
  background: var(--bg-dark);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px;
  padding: 12px;
  text-align: center;
}

.stat-chip .stat-number {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--font-display);
}

.stat-chip .stat-label {
  font-size: 0.72rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 2px;
}

.sidebar-section-label {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--fg-muted);
  margin-bottom: 12px;
}

.events-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.event-chip {
  background: var(--bg-dark);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 8px;
  padding: 10px 12px;
}

.event-chip-type {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 3px;
}

.event-chip-type.exam { color: #f87171; }
.event-chip-type.assignment,
.event-chip-type.project { color: #60a5fa; }
.event-chip-type.quiz { color: #a78bfa; }
.event-chip-type.reading { color: #fbbf24; }
.event-chip-type.deadline { color: var(--red-muted); }
.event-chip-type.other { color: var(--fg-muted); }

.event-chip-title {
  font-size: 0.85rem;
  color: var(--fg);
  margin-bottom: 4px;
  line-height: 1.4;
}

.event-chip-date {
  font-size: 0.75rem;
  color: var(--fg-muted);
}

/* MAIN CALENDAR */
.cal-main {
  padding: 28px 32px;
  overflow-y: auto;
}

.cal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.cal-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
}

.cal-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cal-week-label {
  font-size: 0.9rem;
  color: var(--fg-muted);
  min-width: 180px;
  text-align: center;
}

/* WEEK GRID */
.week-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
}

.day-col {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: 14px 10px;
  min-height: 200px;
}

.day-col.today {
  border-color: var(--accent-glow);
  background: var(--bg-card-alt);
}

.day-name {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--fg-muted);
  margin-bottom: 4px;
}

.day-number {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 12px;
}

.day-col.today .day-number {
  color: var(--accent);
}

.task-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 7px;
  padding: 8px 10px;
  margin-bottom: 7px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, opacity 0.15s;
  user-select: none;
}

.task-card:hover { background: rgba(255,255,255,0.08); }

.task-card.completed {
  opacity: 0.45;
  text-decoration: line-through;
  border-color: transparent;
}

.task-card.completed:hover { opacity: 0.65; }

.task-text {
  font-size: 0.78rem;
  color: var(--fg);
  line-height: 1.4;
}

.task-check {
  font-size: 0.65rem;
  color: var(--accent);
  margin-bottom: 3px;
}

/* empty day */
.day-empty {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.12);
  text-align: center;
  padding-top: 16px;
}

/* MOBILE */
@media (max-width: 900px) {
  .cal-layout {
    grid-template-columns: 1fr;
  }

  .cal-sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }

  .week-grid {
    grid-template-columns: repeat(7, minmax(100px, 1fr));
    overflow-x: auto;
  }
}

@media (max-width: 600px) {
  .upload-wrap { padding: 60px 20px 40px; }
  .drop-zone { padding: 36px 20px; }
  .cal-main { padding: 20px 16px; }
  .week-grid { grid-template-columns: 1fr; }
}