/* =============================================================================
   Language picker modal — KelvinKMS homepage (Safari / iOS friendly)
   1. 基礎樣式  2. 布局樣式  3. 交互樣式  4. 響應式樣式
   ============================================================================= */

/* --- 1. 基礎樣式 --- */
#langToggle.lang-toggle {
  -webkit-appearance: none;
  appearance: none;
  font: inherit;
  color: inherit;
  background: transparent;
  border: none;
  margin: 0;
  display: inline-flex;
  align-items: center;
  line-height: 1.2;
}

.kms-lang-picker-overlay {
  position: fixed;
  inset: 0;
  z-index: 10050;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right))
    max(12px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
  background: rgba(12, 18, 32, 0.55);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  backdrop-filter: blur(12px) saturate(140%);
  box-sizing: border-box;
  overflow: hidden;
  touch-action: none;
}

.kms-lang-picker-overlay[hidden] {
  display: none !important;
}

.kms-lang-picker-card {
  position: relative;
  width: min(420px, 100%);
  max-height: min(92dvh, 560px);
  overflow: hidden;
  border-radius: 18px;
  background: linear-gradient(155deg, rgba(32, 42, 62, 0.96) 0%, rgba(18, 24, 38, 0.98) 100%);
  border: 1px solid rgba(120, 200, 255, 0.22);
  box-shadow:
    0 24px 48px rgba(0, 0, 0, 0.45),
    0 0 0 1px rgba(255, 255, 255, 0.06) inset,
    0 0 40px rgba(0, 234, 211, 0.08);
  color: rgba(235, 242, 255, 0.95);
}

.kms-lang-picker-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(220, 230, 245, 0.9);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: manipulation;
}

.kms-lang-picker-head {
  padding: 22px 48px 8px 22px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.kms-lang-picker-icon {
  font-size: 26px;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.35));
}

.kms-lang-picker-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: rgba(240, 248, 255, 0.96);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
}

.kms-lang-picker-grid {
  padding: 12px 16px 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.kms-lang-opt {
  -webkit-appearance: none;
  appearance: none;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 14px 14px 12px;
  border-radius: 14px;
  border: 1px solid rgba(100, 160, 220, 0.2);
  background: rgba(255, 255, 255, 0.04);
  color: inherit;
  text-align: left;
  cursor: pointer;
  touch-action: manipulation;
  transition:
    border-color 0.2s ease,
    background 0.2s ease,
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.kms-lang-opt-flag {
  font-size: 1.35rem;
  line-height: 1;
}

.kms-lang-opt-primary {
  font-size: 0.95rem;
  font-weight: 700;
  color: rgba(248, 252, 255, 0.98);
}

.kms-lang-opt-code {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: rgba(0, 234, 211, 0.85);
}

/* --- 2. 布局樣式 --- */
body.kms-lang-picker-open {
  overflow: hidden;
}

/* --- 3. 交互樣式 --- */
@media (hover: hover) {
  .kms-lang-picker-close:hover {
    background: rgba(0, 234, 211, 0.15);
    border-color: rgba(0, 234, 211, 0.35);
    color: #e8fffc;
  }

  .kms-lang-opt:hover {
    border-color: rgba(0, 234, 211, 0.45);
    background: rgba(0, 234, 211, 0.08);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
  }
}

.kms-lang-picker-close:active {
  transform: scale(0.96);
}

.kms-lang-opt:active {
  transform: scale(0.98);
}

.kms-lang-opt.is-active {
  border-color: rgba(0, 234, 211, 0.65);
  background: linear-gradient(135deg, rgba(0, 234, 211, 0.14) 0%, rgba(80, 140, 255, 0.1) 100%);
  box-shadow:
    0 0 0 1px rgba(0, 234, 211, 0.25) inset,
    0 10px 28px rgba(0, 0, 0, 0.3);
}

@media (prefers-reduced-motion: reduce) {
  .kms-lang-opt,
  .kms-lang-picker-close {
    transition: none;
  }
}

/* --- 4. 響應式樣式 --- */
@media screen and (max-width: 380px) {
  .kms-lang-picker-grid {
    grid-template-columns: 1fr;
    padding-bottom: max(20px, env(safe-area-inset-bottom));
  }

  .kms-lang-opt {
    min-height: 52px;
  }
}

@media screen and (max-width: 480px) {
  .kms-lang-picker-title {
    font-size: 1.05rem;
  }

  .kms-lang-picker-card {
    border-radius: 16px;
  }
}