/* ============================================================
   CALENDAR — Themed single-date picker dropdown.

   Fully themed via var(--color-*) and var(--font-*) tokens.
   Renders a month grid with navigation, weekday headers, and
   selectable day cells. Positioned absolutely relative to a
   trigger wrapper.

   USAGE (React):
     <div className="ccal" ref={calRef}>
       <button className="ccal__trigger" aria-haspopup="dialog"
         aria-expanded={open}>
         <svg className="ccal__trigger-icon" ...>
           <use href="#icon-calendar"/>
         </svg>
         <span className="ccal__trigger-label">May 24, 2026</span>
       </button>
       {open && (
         <div className="ccal__dropdown">
           <div className="ccal__nav">
             <button className="ccal__nav-btn">‹</button>
             <span className="ccal__title">May 2026</span>
             <button className="ccal__nav-btn">›</button>
           </div>
           <div className="ccal__grid">
             <span className="ccal__weekday">Su</span>
             ...
             <button className="ccal__day">1</button>
             <button className="ccal__day ccal__day--today">24</button>
             <button className="ccal__day ccal__day--selected">25</button>
             <button className="ccal__day ccal__day--disabled">31</button>
           </div>
         </div>
       )}
     </div>

   MODIFIERS:
     .ccal__trigger--placeholder  Muted label when no date selected
     .ccal__day--empty            Blank grid cell (no date)
     .ccal__day--disabled         Greyed out, not selectable
     .ccal__day--today            Accent-coloured, bold
     .ccal__day--selected         Primary fill, white text

   OPTIONAL YEAR NAV (for DOB or multi-year pickers):
     Insert before .ccal__nav:
       <div className="ccal__year-nav">
         <button className="ccal__nav-btn">‹</button>
         <span className="ccal__year-label">2008</span>
         <button className="ccal__nav-btn">›</button>
       </div>
   ============================================================ */


/* ── Wrapper ── */

.ccal {
  position: relative;
}


/* ── Trigger Button ── */

.ccal__trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  text-align: left;
  width: 100%;
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  color: inherit;
}

.ccal__trigger-icon {
  color: var(--color-accent);
  flex-shrink: 0;
}

.ccal__trigger-label {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--color-text-primary);
}

.ccal__trigger--placeholder .ccal__trigger-label {
  color: var(--color-text-secondary);
}


/* ── Dropdown Container ── */

.ccal__dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  z-index: 20;
  background: var(--color-surface-base);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  padding: 16px;
  min-width: 280px;
  animation: ccal__slideIn 0.2s ease-out;
}

@keyframes ccal__slideIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}


/* ── Year Navigation (optional) ── */

.ccal__year-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-subtle, var(--color-border));
}

.ccal__year-label {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.04em;
}


/* ── Month Navigation ── */

.ccal__nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.ccal__nav-btn {
  background: none;
  border: 1px solid var(--color-border);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text-secondary);
  transition: border-color 0.2s, color 0.2s;
}

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

.ccal__nav-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.ccal__title {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-primary);
  letter-spacing: 0.03em;
}


/* ── Day Grid ── */

.ccal__grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  text-align: center;
}

.ccal__weekday {
  font-family: var(--font-body);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  padding: 4px 0 8px;
}


/* ── Day Cells ── */

.ccal__day {
  padding: 8px 2px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--color-text-primary);
  background: transparent;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.ccal__day:hover {
  background: var(--color-surface-warm);
}

.ccal__day--empty {
  cursor: default;
}

.ccal__day--empty:hover {
  background: transparent;
}

.ccal__day--disabled {
  color: var(--color-text-disabled, var(--color-border));
  cursor: not-allowed;
}

.ccal__day--disabled:hover {
  background: transparent;
}

.ccal__day--today {
  font-weight: 600;
  color: var(--color-accent);
}

.ccal__day--selected {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-on-primary);
  font-weight: 600;
}

.ccal__day--selected:hover {
  background: var(--color-primary);
}

.ccal__day--selected.ccal__day--today {
  color: var(--color-on-primary);
}


/* ── Reduced Motion ── */

@media (prefers-reduced-motion: reduce) {
  .ccal__dropdown {
    animation: none;
  }
}


/* ── Responsive ── */

@media (max-width: 380px) {
  .ccal__dropdown {
    min-width: unset;
    left: 0;
    right: 0;
  }
}