/* ==========================================================================
   Calendar Modal (Pro UI/UX Shell) – v4.1
   - Centered dialog (true middle) with safe mobile behavior
   - Scoped tokens (prefers .calendar, but works globally)
   - Single visibility contract: aria-hidden="false" OR .is-open
   - Works for both: main modal + info modal
   - Robust scroll/overscroll + safe focus ring
   ========================================================================== */

/* ----------------------------------------------------------
   Tokens / Defaults
   ---------------------------------------------------------- */
:root {
  --cal-modal-z: 1000;

  --cal-surface: rgba(18, 18, 26, 0.98);
  --cal-surface-2: rgba(255, 255, 255, 0.04);
  --cal-border: rgba(255, 255, 255, 0.10);
  --cal-border-strong: rgba(255, 255, 255, 0.22);

  --cal-text: rgba(255, 255, 255, 0.92);
  --cal-muted: rgba(255, 255, 255, 0.70);
  --cal-muted-2: rgba(255, 255, 255, 0.58);

  --cal-shadow: 0 18px 60px rgba(0, 0, 0, 0.65);
  --cal-radius: 18px;

  --cal-backdrop: rgba(0, 0, 0, 0.72);

  --cal-pad: 1.25rem;
  --cal-gap: 0.9rem;

  --cal-focus: rgba(125, 211, 252, 0.65);
  --cal-accent: rgba(255, 205, 95, 0.90);

  --cal-btn-bg: rgba(255, 255, 255, 0.06);
  --cal-btn-bg-hover: rgba(255, 255, 255, 0.10);
  --cal-btn-border: rgba(255, 255, 255, 0.14);

  --cal-safe-top: env(safe-area-inset-top, 0px);
  --cal-safe-bot: env(safe-area-inset-bottom, 0px);
}

/* ----------------------------------------------------------
   Root wrapper (hidden by default)
   ---------------------------------------------------------- */
.calendar-modal {
  position: fixed;
  inset: 0;
  z-index: var(--cal-modal-z);

  /* Hidden until opened */
  display: none;

  /* Centering layout (true middle) */
  align-items: center;
  justify-content: center;

  /* Padding keeps dialog away from edges */
  padding:
    calc(16px + var(--cal-safe-top))
    16px
    calc(16px + var(--cal-safe-bot));

  /* Allow backdrop click area, but still allow scroll if dialog is tall */
  overflow: auto;
  -webkit-overflow-scrolling: touch;

  /* Prevent page scroll chaining on iOS/trackpads */
  overscroll-behavior: contain;

  /* Keep layout stable */
  box-sizing: border-box;
}

/* Visibility: aria-hidden="false" is the main switch; .is-open is backup */
.calendar-modal.is-open,
.calendar-modal[aria-hidden="false"] {
  display: flex;
}

/* Optional: subtle open animation (safe) */
.calendar-modal.is-open .calendar-modal-container,
.calendar-modal[aria-hidden="false"] .calendar-modal-container {
  animation: calModalIn 160ms ease-out 1;
}

@keyframes calModalIn {
  from { transform: translateY(6px) scale(0.995); opacity: 0.85; }
  to   { transform: translateY(0)   scale(1);     opacity: 1; }
}

/* ----------------------------------------------------------
   Backdrop
   ---------------------------------------------------------- */
.calendar-modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--cal-backdrop);

  backdrop-filter: saturate(120%) blur(2px);
  -webkit-backdrop-filter: saturate(120%) blur(2px);
}

/* ----------------------------------------------------------
   Container (dialog surface)
   ---------------------------------------------------------- */
.calendar-modal-container {
  position: relative;
  z-index: 1;

  width: min(720px, 100%);
  max-width: 100%;

  /* If content grows, container scrolls internally via .calendar-modal-scroll */
  max-height: min(86vh, 860px);

  background: var(--cal-surface);
  border: 1px solid var(--cal-border);
  border-radius: var(--cal-radius);
  box-shadow: var(--cal-shadow);

  overflow: hidden;
  outline: none;

  transform: translateZ(0);
  box-sizing: border-box;
}

/* Small screens */
@media (max-width: 560px) {
  .calendar-modal {
    padding:
      calc(12px + var(--cal-safe-top))
      12px
      calc(12px + var(--cal-safe-bot));
  }

  .calendar-modal-container {
    border-radius: 16px;
    max-height: min(88vh, 860px);
  }
}

/* Focus ring (container receives focus in JS) */
.calendar-modal-container:focus-visible {
  box-shadow:
    var(--cal-shadow),
    0 0 0 2px var(--cal-focus);
}

/* ----------------------------------------------------------
   Header (sticky)
   ---------------------------------------------------------- */
.calendar-modal-header {
  position: sticky;
  top: 0;
  z-index: 2;

  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--cal-gap);

  padding: var(--cal-pad);
  background: linear-gradient(
    180deg,
    rgba(18,18,26,0.98),
    rgba(18,18,26,0.92)
  );

  border-bottom: 1px solid var(--cal-border);
}

.calendar-modal-header__left {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

/* Optional icon shell (events.php / future) */
.calendar-modal-icon {
  width: 34px;
  height: 34px;
  border-radius: 999px;

  display: grid;
  place-items: center;

  background: rgba(125, 211, 252, 0.14);
  border: 1px solid rgba(125, 211, 252, 0.30);
  color: rgba(125, 211, 252, 0.92);
}

.calendar-modal-title {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.25;
  color: var(--cal-text);
  letter-spacing: 0.2px;

  /* Prevent overflow */
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Subtitle (future-proof)
   NOTE: was display:none; now auto-hides only when empty. */
.calendar-modal-subtitle {
  margin: 0.35rem 0 0;
  font-size: 0.9rem;
  line-height: 1.35;
  color: var(--cal-muted);
}
.calendar-modal-subtitle:empty {
  display: none;
}

.calendar-modal-header__right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

/* Toolbar slot */
.calendar-modal-toolbar {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
}

/* Base action button (toolbar + footer) */
.calendar-modal .cal-btn {
  appearance: none;
  border: 1px solid var(--cal-btn-border);
  background: var(--cal-btn-bg);
  color: var(--cal-text);
  border-radius: 999px;
  padding: 0.55rem 0.85rem;
  font-size: 0.9rem;
  line-height: 1;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  user-select: none;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
}

.calendar-modal .cal-btn:hover {
  background: var(--cal-btn-bg-hover);
  border-color: var(--cal-border-strong);
}

.calendar-modal .cal-btn:active {
  transform: translateY(1px);
}

.calendar-modal .cal-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--cal-focus);
}

/* Optional “primary” variant */
.calendar-modal .cal-btn.cal-btn--primary {
  background: rgba(125, 211, 252, 0.16);
  border-color: rgba(125, 211, 252, 0.35);
}

.calendar-modal .cal-btn.cal-btn--primary:hover {
  background: rgba(125, 211, 252, 0.22);
  border-color: rgba(125, 211, 252, 0.45);
}

/* Close button */
.calendar-modal-close {
  background: transparent;
  border: 0;
  color: var(--cal-muted);
  cursor: pointer;

  min-width: 44px;
  min-height: 44px;

  border-radius: 12px;
  display: grid;
  place-items: center;

  transition: background 140ms ease, color 140ms ease;
}

.calendar-modal-close:hover {
  background: rgba(255,255,255,0.06);
  color: var(--cal-text);
}

.calendar-modal-close:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--cal-focus);
}

.calendar-modal-close span {
  font-size: 1.6rem;
  line-height: 1;
}

/* ----------------------------------------------------------
   Scroll region + body
   ---------------------------------------------------------- */
.calendar-modal-scroll {
  /* Header height safe (approx) */
  max-height: calc(100% - 72px);
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-gutter: stable;

  /* Prevent scroll chaining */
  overscroll-behavior: contain;
}

.calendar-modal-body {
  padding: var(--cal-pad);
  color: var(--cal-text);
  font-size: 0.98rem;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.calendar-modal-body:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--cal-focus);
  border-radius: 12px;
}

/* Typography */
.calendar-modal-body p {
  margin: 0 0 0.9rem;
  color: var(--cal-text);
}
.calendar-modal-body p:last-child {
  margin-bottom: 0;
}
.calendar-modal-body a {
  color: rgba(125, 211, 252, 0.95);
  text-decoration: none;
}
.calendar-modal-body a:hover {
  text-decoration: underline;
}
.calendar-modal-muted {
  color: var(--cal-muted);
}

/* Section titles (JS render) */
.calendar-modal-section-title {
  margin: 1.25rem 0 0.55rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: rgba(255,255,255,0.88);
  letter-spacing: 0.2px;
}

.calendar-modal-description {
  padding: 0.9rem 1rem;
  border: 1px solid var(--cal-border);
  background: var(--cal-surface-2);
  border-radius: 14px;
}

/* ----------------------------------------------------------
   Loading state (JS)
   ---------------------------------------------------------- */
.calendar-loading {
  display: flex;
  align-items: center;
  gap: 0.65rem;

  padding: 0.9rem 1rem;
  border: 1px solid var(--cal-border);
  background: var(--cal-surface-2);
  border-radius: 14px;

  color: var(--cal-muted);
  font-weight: 600;
}

.calendar-loading::before {
  content: "";
  width: 14px;
  height: 14px;
  border-radius: 999px;
  border: 2px solid rgba(255,255,255,0.18);
  border-top-color: var(--cal-accent);
  animation: calSpin 850ms linear infinite;
}

@keyframes calSpin {
  to { transform: rotate(360deg); }
}

/* ----------------------------------------------------------
   Downloads (JS)
   ---------------------------------------------------------- */
.calendar-downloads {
  margin-top: 1.1rem;
}

.calendar-downloads__list {
  list-style: none;
  margin: 0;
  padding: 0;

  display: grid;
  gap: 0.6rem;
}

.calendar-downloads__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;

  padding: 0.85rem 0.95rem;
  border-radius: 14px;
  border: 1px solid var(--cal-border);
  background: var(--cal-surface-2);
}

.calendar-downloads__label {
  color: var(--cal-text);
  font-weight: 650;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.calendar-downloads__btn {
  appearance: none;
  border: 1px solid var(--cal-btn-border);
  background: rgba(255, 205, 95, 0.12);
  color: rgba(255,255,255,0.92);

  border-radius: 999px;
  padding: 0.55rem 0.85rem;
  font-size: 0.9rem;
  line-height: 1;

  text-decoration: none;
  cursor: pointer;
  flex-shrink: 0;

  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
}

.calendar-downloads__btn:hover {
  background: rgba(255, 205, 95, 0.18);
  border-color: rgba(255, 205, 95, 0.30);
}

.calendar-downloads__btn:active {
  transform: translateY(1px);
}

.calendar-downloads__btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--cal-focus);
}

/* ----------------------------------------------------------
   Preview iframe (JS)
   ---------------------------------------------------------- */
.calendar-preview {
  margin-top: 1.1rem;
}

.calendar-preview__frame {
  border-radius: 16px;
  border: 1px solid var(--cal-border);
  background: rgba(0,0,0,0.35);
  overflow: hidden;

  aspect-ratio: 16 / 9;
  min-height: 260px;
}

.calendar-preview__frame iframe {
  width: 100%;
  height: 100%;
  display: block;
  border: 0;
}

/* ----------------------------------------------------------
   Footer
   ---------------------------------------------------------- */
.calendar-modal-footer {
  border-top: 1px solid var(--cal-border);
  padding: 0.9rem var(--cal-pad);
  background: rgba(18,18,26,0.96);

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.calendar-modal-footer__left,
.calendar-modal-footer__right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ----------------------------------------------------------
   Body lock (JS toggles)
   ---------------------------------------------------------- */
body.calendar-modal-open,
body[data-calendar-scroll-lock="true"] {
  overflow: hidden;
  scrollbar-gutter: stable;
}

/* ----------------------------------------------------------
   Noscript warning (optional)
   ---------------------------------------------------------- */
.calendar-modal-noscript-warning {
  margin: 1rem 0;
  padding: 0.85rem 1rem;
  border-radius: 14px;
  border: 1px solid rgba(255, 205, 95, 0.25);
  background: rgba(255, 205, 95, 0.08);
  color: rgba(255,255,255,0.88);
}

/* ----------------------------------------------------------
   Info modal sizing
   ---------------------------------------------------------- */
.calendar-info-modal .calendar-modal-container {
  width: min(640px, 100%);
}