/*!
 * Date Request Calendar - Styles
 * すべての色・サイズは CSS 変数でカスタマイズ可能
 */

:root {
  --drc-primary: #3a7bd5;
  --drc-primary-hover: #2c63ad;
  --drc-primary-soft: rgba(58, 123, 213, 0.1);
  --drc-text: #2a2f36;
  --drc-text-muted: #6b7280;
  --drc-text-disabled: #c4c8cf;
  --drc-bg: #ffffff;
  --drc-bg-alt: #f7f8fa;
  --drc-border: #e5e7eb;
  --drc-border-strong: #d1d5db;
  --drc-saturday: #2563eb;
  --drc-sunday: #dc2626;
  --drc-today-bg: #eef2f7;
  --drc-today-ring: #3a7bd5;
  --drc-error: #dc2626;
  --drc-error-bg: rgba(220, 38, 38, 0.08);
  --drc-shadow: 0 12px 40px rgba(15, 23, 42, 0.18);
  --drc-radius: 14px;
  --drc-radius-sm: 8px;
  --drc-cell-size: 40px;
  --drc-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  --drc-z-backdrop: 9998;
  --drc-z-calendar: 9999;
}

/* ---------- 入力欄 ---------- */
.drc-input {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='4' width='18' height='18' rx='2'/%3E%3Cpath d='M16 2v4M8 2v4M3 10h18'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 18px 18px;
  padding-right: 40px;
}
.drc-input:focus {
  outline: none;
  border-color: var(--drc-primary);
  box-shadow: 0 0 0 3px var(--drc-primary-soft);
}
.drc-input.drc-input-error {
  border-color: var(--drc-error);
  background-color: var(--drc-error-bg);
}
.drc-input.drc-input-error:focus {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
}

/* ---------- エラーメッセージ ---------- */
.drc-error {
  display: none;
  margin-top: 6px;
  font-size: 12px;
  color: var(--drc-error);
  font-weight: 500;
  line-height: 1.5;
  animation: drc-error-shake 0.32s cubic-bezier(.36,.07,.19,.97);
}
.drc-error::before {
  content: "⚠";
  margin-right: 4px;
  font-size: 11px;
}
.drc-error.is-shown { display: block; }
@keyframes drc-error-shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-3px); }
  40%, 80% { transform: translateX(3px); }
}

/* ---------- バックドロップ ---------- */
.drc-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0);
  z-index: var(--drc-z-backdrop);
  pointer-events: none;
  transition: background 0.18s ease;
}
.drc-backdrop.is-open {
  pointer-events: auto;
}

/* ---------- カレンダー本体 ---------- */
.drc-calendar {
  position: absolute;
  z-index: var(--drc-z-calendar);
  width: 320px;
  background: var(--drc-bg);
  border: 1px solid var(--drc-border);
  border-radius: var(--drc-radius);
  box-shadow: var(--drc-shadow);
  font-family: var(--drc-font);
  color: var(--drc-text);
  font-size: 14px;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 0.16s ease, transform 0.16s ease;
}
.drc-calendar.is-open {
  opacity: 1;
  transform: translateY(0);
}
.drc-calendar[hidden] { display: none; }
.drc-calendar * { box-sizing: border-box; }
.drc-calendar button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}

/* ---------- ヘッダー ---------- */
.drc-header {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 12px 14px 8px;
  border-bottom: 1px solid var(--drc-border);
}
.drc-title {
  flex: 1;
  text-align: center;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
}
.drc-nav,
.drc-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--drc-text);
  transition: background 0.14s ease, color 0.14s ease;
}
.drc-nav:hover:not([disabled]),
.drc-close:hover {
  background: var(--drc-bg-alt);
}
.drc-nav[disabled] {
  color: var(--drc-text-disabled);
  cursor: not-allowed;
}
.drc-close { margin-left: 2px; }

/* ---------- 曜日見出し ---------- */
.drc-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  padding: 10px 12px 4px;
}
.drc-weekday {
  text-align: center;
  font-size: 11px;
  font-weight: 600;
  color: var(--drc-text-muted);
  padding: 4px 0;
  letter-spacing: 0.05em;
}
.drc-weekday.is-sun { color: var(--drc-sunday); }
.drc-weekday.is-sat { color: var(--drc-saturday); }

/* ---------- 日付グリッド ---------- */
.drc-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  padding: 0 12px 12px;
}
.drc-cell {
  height: var(--drc-cell-size);
  border-radius: var(--drc-radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  color: var(--drc-text);
  background: transparent;
  transition: background 0.12s ease, color 0.12s ease, transform 0.08s ease;
}
.drc-cell.is-empty {
  background: transparent;
  cursor: default;
}
.drc-cell.is-sun { color: var(--drc-sunday); }
.drc-cell.is-sat { color: var(--drc-saturday); }

.drc-cell.is-disabled {
  color: var(--drc-text-disabled);
  cursor: not-allowed;
  opacity: 0.85;
}
.drc-cell.is-disabled.is-sun,
.drc-cell.is-disabled.is-sat { color: var(--drc-text-disabled); }
.drc-cell.is-excluded { text-decoration: line-through; }

.drc-cell.is-selectable {
  cursor: pointer;
  font-weight: 600;
}
.drc-cell.is-selectable::before {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1.5px solid var(--drc-primary);
  border-radius: var(--drc-radius-sm);
  opacity: 0.35;
  transition: opacity 0.14s ease, background 0.14s ease;
}
.drc-cell.is-selectable:hover::before,
.drc-cell.is-selectable:focus-visible::before {
  opacity: 1;
  background: var(--drc-primary-soft);
}
.drc-cell.is-selectable:active { transform: scale(0.96); }

.drc-cell.is-today {
  background: var(--drc-today-bg);
  color: var(--drc-text);
  opacity: 1;
}
.drc-cell.is-today.is-sun { color: var(--drc-sunday); }
.drc-cell.is-today.is-sat { color: var(--drc-saturday); }
.drc-cell.is-today .drc-day {
  font-weight: 600;
}
.drc-cell.is-today .drc-cell-note-today {
  color: var(--drc-text-muted);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.drc-cell.is-today.is-selected {
  /* selected が優先 */
  background: var(--drc-primary);
  color: #fff;
}
.drc-cell.is-today.is-selected .drc-cell-note-today {
  color: rgba(255, 255, 255, 0.85);
}

.drc-cell.is-selected {
  background: var(--drc-primary);
  color: #fff !important;
}
.drc-cell.is-selected::before { display: none; }

.drc-cell.is-taken {
  background: repeating-linear-gradient(
    -45deg,
    transparent 0,
    transparent 4px,
    rgba(0,0,0,0.04) 4px,
    rgba(0,0,0,0.04) 8px
  );
}

.drc-day { font-size: 14px; }
.drc-cell-note {
  font-size: 9px;
  color: var(--drc-text-muted);
  margin-top: 1px;
  letter-spacing: 0;
}

/* ---------- 時間帯 ---------- */
.drc-timeslots {
  border-top: 1px solid var(--drc-border);
  padding: 10px 14px;
  background: var(--drc-bg-alt);
}
.drc-timeslots-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--drc-text-muted);
  margin-bottom: 6px;
  letter-spacing: 0.05em;
}
.drc-timeslots-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.drc-timeslot {
  flex: 1 1 auto;
  min-width: 80px;
  padding: 8px 10px;
  border: 1.5px solid var(--drc-border-strong);
  border-radius: var(--drc-radius-sm);
  background: var(--drc-bg);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.14s ease;
}
.drc-timeslot:hover {
  border-color: var(--drc-primary);
  color: var(--drc-primary);
}
.drc-timeslot.is-active {
  border-color: var(--drc-primary);
  background: var(--drc-primary);
  color: #fff;
}

/* ---------- フッター ---------- */
.drc-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-top: 1px solid var(--drc-border);
  background: var(--drc-bg-alt);
  border-radius: 0 0 var(--drc-radius) var(--drc-radius);
}
.drc-current {
  flex: 1;
  font-size: 12px;
  color: var(--drc-text-muted);
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.drc-actions { display: flex; gap: 6px; flex-shrink: 0; }
.drc-btn {
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all 0.14s ease;
}
.drc-btn[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
}
.drc-btn-ghost { color: var(--drc-text-muted); }
.drc-btn-ghost:hover:not([disabled]) {
  background: var(--drc-bg);
  color: var(--drc-text);
}
.drc-btn-primary {
  background: var(--drc-primary);
  color: #fff;
}
.drc-btn-primary:hover:not([disabled]) {
  background: var(--drc-primary-hover);
}

/* ---------- モバイル (≤600px) ---------- */
@media (max-width: 600px) {
  .drc-backdrop.is-open {
    background: rgba(15, 23, 42, 0.45);
  }
  .drc-calendar {
    position: fixed;
    top: auto !important;
    left: 0 !important;
    right: 0;
    bottom: 0;
    width: 100%;
    border-radius: var(--drc-radius) var(--drc-radius) 0 0;
    transform: translateY(20px);
    --drc-cell-size: 44px;
    font-size: 15px;
    max-height: 92vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  .drc-calendar.is-open { transform: translateY(0); }
  .drc-header { padding: 14px 16px 10px; }
  .drc-title { font-size: 16px; }
  .drc-day { font-size: 15px; }
  .drc-footer {
    padding-bottom: max(12px, env(safe-area-inset-bottom));
  }
}

/* モバイルでスクロール固定 */
body.drc-no-scroll-mobile { overflow: visible; }
@media (max-width: 600px) {
  body.drc-no-scroll-mobile {
    overflow: hidden;
    position: fixed;
    width: 100%;
  }
}

/* ---------- ハイコントラスト / アクセシビリティ ---------- */
.drc-cell.is-selectable:focus-visible {
  outline: 2px solid var(--drc-primary);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .drc-calendar,
  .drc-cell,
  .drc-btn,
  .drc-timeslot { transition: none; }
}