/* =============================================
   ENGLISH UP! — calendar.css
   Schedule / Calendar feature styles
============================================= */

/* ════════════════════════════════════════════
   PAGE LAYOUT
════════════════════════════════════════════ */

.calendar-page {
  max-width: 960px;
  margin: 0 auto;
  padding: var(--sp-6) var(--sp-4) var(--sp-16);
  animation: fadeSlideUp 280ms var(--ease-out) both;
}

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ════════════════════════════════════════════
   PAGE HEADER
════════════════════════════════════════════ */

.cal-page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  margin-bottom: var(--sp-8);
  flex-wrap: wrap;
}

.cal-page-title {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.cal-page-title h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--weight-black);
  color: var(--color-text);
  line-height: 1;
}

.cal-page-title .cal-title-icon {
  font-size: var(--text-2xl);
  line-height: 1;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,.12));
}

.cal-page-actions {
  display: flex;
  gap: var(--sp-2);
  align-items: center;
}

/* ════════════════════════════════════════════
   TWO-COLUMN LAYOUT
════════════════════════════════════════════ */

.cal-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--sp-6);
  align-items: start;
}

@media (max-width: 720px) {
  .cal-layout {
    grid-template-columns: 1fr;
  }
}

/* ════════════════════════════════════════════
   CALENDAR CARD
════════════════════════════════════════════ */

.cal-card {
  background: var(--color-surface);
  border: 1.5px solid var(--color-border-soft);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

/* ── Month Nav ── */

.cal-month-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-5) var(--sp-6);
  background: linear-gradient(135deg, var(--brand-500) 0%, var(--brand-400) 100%);
  position: relative;
  overflow: hidden;
}

.cal-month-nav::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top right, rgba(255,255,255,0.18) 0%, transparent 60%);
  pointer-events: none;
}

.cal-month-label {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--weight-black);
  color: var(--neutral-900);
  letter-spacing: -0.02em;
  position: relative;
}

.cal-nav-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 2px solid rgba(0,0,0,0.15);
  background: rgba(255,255,255,0.30);
  color: var(--neutral-900);
  font-size: var(--text-md);
  font-weight: var(--weight-black);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--duration-fast) var(--ease-default),
              transform  var(--duration-fast) var(--ease-spring);
  position: relative;
  backdrop-filter: blur(4px);
}

.cal-nav-btn:hover {
  background: rgba(255,255,255,0.50);
  transform: scale(1.08);
}

.cal-nav-btn:active {
  transform: scale(0.94);
}

/* ── Weekday headers ── */

.cal-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  padding: var(--sp-3) var(--sp-4) var(--sp-2);
  background: var(--color-surface-alt);
  border-bottom: 1.5px solid var(--color-border-soft);
}

.cal-weekday {
  text-align: center;
  font-size: var(--text-xs);
  font-weight: var(--weight-extrabold);
  color: var(--color-text-faint);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: var(--sp-1) 0;
}

/* ── Days grid ── */

.cal-days-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  padding: var(--sp-3) var(--sp-4) var(--sp-4);
  background: var(--color-surface);
}

.cal-day {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  border-radius: var(--radius-md);
  cursor: pointer;
  position: relative;
  transition: background var(--duration-fast) var(--ease-default),
              transform  var(--duration-fast) var(--ease-spring);
  min-height: 48px;
  padding: 4px 2px;
}

.cal-day:hover:not(.cal-day-empty):not(.cal-day-past) {
  background: var(--color-surface-alt);
  transform: scale(1.06);
}

.cal-day-number {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-text);
  line-height: 1;
}

.cal-day-empty .cal-day-number { opacity: 0; pointer-events: none; }
.cal-day-empty { cursor: default; }

.cal-day-past .cal-day-number {
  color: var(--color-text-faint);
}
.cal-day-past { cursor: default; }

.cal-day-today {
  background: linear-gradient(135deg, var(--brand-100), var(--brand-50));
  border: 2px solid var(--brand-400);
}

.cal-day-today .cal-day-number {
  color: var(--brand-700);
  font-weight: var(--weight-black);
}

.cal-day-selected {
  background: var(--brand-500) !important;
  transform: scale(1.06);
}

.cal-day-selected .cal-day-number {
  color: var(--neutral-900) !important;
  font-weight: var(--weight-black);
}

.cal-day-has-class {
  /* Blue dot indicator applied via .cal-day-dots */
}

/* ── Event dots ── */

.cal-day-dots {
  display: flex;
  gap: 2px;
  align-items: center;
  justify-content: center;
  min-height: 6px;
}

.cal-dot {
  width: 5px;
  height: 5px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.cal-dot-class    { background: var(--teal-500); }
.cal-dot-pending  { background: var(--brand-400); }
.cal-dot-request  { background: var(--rose-400); }

/* ════════════════════════════════════════════
   SIDEBAR PANEL
════════════════════════════════════════════ */

.cal-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.cal-sidebar-card {
  background: var(--color-surface);
  border: 1.5px solid var(--color-border-soft);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  animation: fadeSlideUp 300ms var(--ease-out) both;
}

.cal-sidebar-header {
  padding: var(--sp-4) var(--sp-5) var(--sp-3);
  border-bottom: 1.5px solid var(--color-border-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
}

.cal-sidebar-title {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: var(--weight-bold);
  color: var(--color-text);
}

.cal-sidebar-body {
  padding: var(--sp-4) var(--sp-5);
}

/* ── Selected day panel ── */

.cal-selected-date-label {
  font-size: var(--text-sm);
  font-weight: var(--weight-extrabold);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--sp-3);
}

.cal-no-events {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-5) 0;
  color: var(--color-text-faint);
  text-align: center;
}

.cal-no-events-icon {
  font-size: 2rem;
  opacity: 0.5;
}

.cal-no-events-text {
  font-size: var(--text-sm);
}

/* ════════════════════════════════════════════
   EVENT ITEMS
════════════════════════════════════════════ */

.cal-events-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.cal-event-item {
  border-radius: var(--radius-lg);
  padding: var(--sp-3) var(--sp-4);
  position: relative;
  overflow: hidden;
  border: 1.5px solid transparent;
  transition: transform var(--duration-fast) var(--ease-spring),
              box-shadow var(--duration-fast) var(--ease-default);
}

.cal-event-item:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.cal-event-item::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  border-radius: var(--radius-full);
}

.cal-event-class {
  background: var(--teal-50);
  border-color: var(--teal-100);
}
.cal-event-class::before { background: var(--teal-500); }
[data-theme="dark"] .cal-event-class { background: rgba(20,184,166,0.10); border-color: rgba(20,184,166,0.25); }

.cal-event-pending {
  background: var(--brand-50);
  border-color: var(--brand-100);
}
.cal-event-pending::before { background: var(--brand-500); }
[data-theme="dark"] .cal-event-pending { background: rgba(245,158,11,0.10); border-color: rgba(245,158,11,0.25); }

.cal-event-request {
  background: #fff1f2;
  border-color: #fecdd3;
}
.cal-event-request::before { background: var(--rose-400); }
[data-theme="dark"] .cal-event-request { background: rgba(251,113,133,0.10); border-color: rgba(251,113,133,0.25); }

.cal-event-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-2);
  margin-bottom: var(--sp-1);
}

.cal-event-title {
  font-weight: var(--weight-extrabold);
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: var(--leading-snug);
}

.cal-event-badge {
  flex-shrink: 0;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 10px;
  font-weight: var(--weight-extrabold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.badge-class    { background: var(--teal-100);   color: var(--teal-700); }
.badge-pending  { background: var(--brand-100);  color: var(--brand-700); }
.badge-request  { background: #ffe4e6;            color: #be123c; }
.badge-approved { background: #dcfce7;            color: var(--green-600); }
.badge-rejected { background: var(--neutral-150); color: var(--neutral-600); }

.cal-event-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: var(--weight-semibold);
  flex-wrap: wrap;
}

.cal-event-meta-item {
  display: flex;
  align-items: center;
  gap: 3px;
}

.cal-event-desc {
  margin-top: var(--sp-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  font-style: italic;
}

.cal-event-actions {
  display: flex;
  gap: var(--sp-2);
  margin-top: var(--sp-3);
  flex-wrap: wrap;
}

/* ════════════════════════════════════════════
   UPCOMING EVENTS MINI-LIST
════════════════════════════════════════════ */

.cal-upcoming-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.cal-upcoming-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--duration-fast);
}

.cal-upcoming-item:hover {
  background: var(--color-surface-alt);
}

.cal-upcoming-date-badge {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--brand-400), var(--brand-500));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--neutral-900);
}

.cal-upcoming-day   { font-size: var(--text-md); font-weight: var(--weight-black); line-height: 1; }
.cal-upcoming-month { font-size: 9px; font-weight: var(--weight-extrabold); text-transform: uppercase; letter-spacing: 0.06em; }

.cal-upcoming-info { flex: 1; min-width: 0; }
.cal-upcoming-title {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cal-upcoming-time {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: 1px;
}

.cal-upcoming-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

/* ════════════════════════════════════════════
   LEGEND
════════════════════════════════════════════ */

.cal-legend {
  display: flex;
  gap: var(--sp-4);
  flex-wrap: wrap;
  padding: var(--sp-3) var(--sp-5);
  background: var(--color-surface-alt);
  border-top: 1.5px solid var(--color-border-soft);
}

.cal-legend-item {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  color: var(--color-text-muted);
}

.cal-legend-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

/* ════════════════════════════════════════════
   MODAL: SCHEDULE CLASS / REQUEST
════════════════════════════════════════════ */

.cal-form {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.cal-form label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--weight-extrabold);
  color: var(--color-text-muted);
  margin-bottom: var(--sp-1);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.cal-form .form-input,
.cal-form select,
.cal-form textarea {
  width: 100%;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
  background: var(--color-surface-alt);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
  box-sizing: border-box;
}

.cal-form .form-input:focus,
.cal-form select:focus,
.cal-form textarea:focus {
  outline: none;
  border-color: var(--brand-400);
  box-shadow: var(--shadow-glow-brand);
}

.cal-form textarea {
  resize: vertical;
  min-height: 80px;
}

.cal-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3);
}

@media (max-width: 420px) {
  .cal-form-row { grid-template-columns: 1fr; }
}

/* ════════════════════════════════════════════
   TEACHER: REQUEST REVIEW CARD
════════════════════════════════════════════ */

.cal-request-review {
  border-left: 4px solid var(--rose-400);
  padding-left: var(--sp-4);
  margin-bottom: var(--sp-3);
}

.cal-request-student {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: var(--weight-bold);
  margin-bottom: var(--sp-1);
}

.cal-request-note {
  font-size: var(--text-sm);
  color: var(--color-text);
  font-style: italic;
  background: var(--color-surface-alt);
  border-radius: var(--radius-sm);
  padding: var(--sp-2) var(--sp-3);
  margin-top: var(--sp-2);
  line-height: var(--leading-relaxed);
}

/* ════════════════════════════════════════════
   FAB BUTTON (Calendar entry point)
════════════════════════════════════════════ */

#cal-fab {
  position: fixed;
  bottom: calc(72px + var(--sp-4));
  right: var(--sp-5);
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--teal-500), var(--teal-600));
  color: white;
  border: none;
  font-size: 1.3rem;
  cursor: pointer;
  box-shadow: var(--shadow-xl), 0 0 0 3px rgba(20,184,166,0.20);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--duration-fast) var(--ease-spring),
              box-shadow var(--duration-fast);
  z-index: var(--z-ai);
}

#cal-fab:hover {
  transform: scale(1.10);
  box-shadow: var(--shadow-xl), 0 0 0 6px rgba(20,184,166,0.25);
}

#cal-fab:active { transform: scale(0.96); }
#cal-fab.hidden { display: none; }

/* Badge on FAB for pending requests */
#cal-fab-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 18px;
  height: 18px;
  border-radius: var(--radius-full);
  background: var(--rose-500);
  color: white;
  font-size: 10px;
  font-weight: var(--weight-black);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-surface);
}

/* ════════════════════════════════════════════
   EMPTY STATE
════════════════════════════════════════════ */

.cal-empty-upcoming {
  text-align: center;
  padding: var(--sp-6) var(--sp-4);
  color: var(--color-text-faint);
}

.cal-empty-upcoming-icon {
  font-size: 2.5rem;
  margin-bottom: var(--sp-2);
  opacity: 0.4;
}

.cal-empty-upcoming-text {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

/* ════════════════════════════════════════════
   TEACHER REQUESTS BADGE (navbar integration)
════════════════════════════════════════════ */

.cal-requests-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--rose-500);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: 10px;
  font-weight: var(--weight-black);
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  margin-left: var(--sp-1);
  vertical-align: middle;
}

/* ════════════════════════════════════════════
   RESPONSIVE TWEAKS
════════════════════════════════════════════ */

@media (max-width: 480px) {
  .cal-month-label { font-size: var(--text-lg); }
  .cal-day { min-height: 40px; }
  .cal-day-number { font-size: var(--text-xs); }
  .cal-form-row { grid-template-columns: 1fr; }
}

/* ════════════════════════════════════════════
   SKELETON
════════════════════════════════════════════ */

.cal-skeleton {
  background: var(--color-surface);
  border: 1.5px solid var(--color-border-soft);
  border-radius: var(--radius-xl);
  overflow: hidden;
  padding: var(--sp-6);
}

@keyframes shimmer {
  from { background-position: -200% 0; }
  to   { background-position:  200% 0; }
}

.cal-skeleton-bar {
  border-radius: var(--radius-md);
  background: linear-gradient(90deg,
    var(--color-surface-alt) 25%,
    var(--color-border-soft) 50%,
    var(--color-surface-alt) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
}