/* ==========================================================================
   共通CSS (Variables, Reset, Base Utilities, Components)
   ========================================================================== */

:root {
  --font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
  --font-heading: 'Zen Maru Gothic', 'Helvetica Neue', Arial, sans-serif;

  /* カラーパレット (雪餅・パステル調) */
  --color-primary: #7c93c3;
  --color-primary-light: #9eb5db;
  --color-primary-dark: #5b72a0;
  --color-accent: #f5a3b7;
  --color-accent-light: #ffd1dc;
  --color-accent-dark: #df7e96;

  --color-bg-main: #f9fafc;
  --color-bg-card: #ffffff;
  --color-bg-subtle: #f0f4f9;

  --color-text-main: #2d3748;
  --color-text-muted: #718096;
  --color-text-light: #a0aec0;
  --color-border: #e2e8f0;
  --color-border-focus: #9eb5db;

  --color-success: #48bb78;
  --color-warning: #ecc94b;
  --color-danger: #f56565;
  --color-info: #4299e1;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.02);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg-main);
  color: var(--color-text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: 0.95rem;
}

/* ボタン共通 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(124, 147, 195, 0.35);
}

.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(245, 163, 183, 0.4);
}

.btn-accent:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--color-border);
  color: var(--color-text-main);
}

.btn-outline:hover {
  background-color: var(--color-bg-subtle);
  border-color: var(--color-text-muted);
}

.btn-danger {
  background-color: #fee2e2;
  color: #dc2626;
  border-color: #fecaca;
}

.btn-danger:hover {
  background-color: #fecaca;
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

/* バッジ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background-color: var(--color-bg-subtle);
  color: var(--color-text-muted);
}

.badge-primary {
  background-color: #e0e7ff;
  color: #4338ca;
}

.badge-success {
  background-color: #dcfce7;
  color: #15803d;
}

.badge-warning {
  background-color: #fef9c3;
  color: #a16207;
}

/* トースト通知 */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 280px;
  max-width: 420px;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  background: #ffffff;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--color-text-main);
  border-left: 4px solid var(--color-primary);
  animation: toastIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast.toast-success {
  border-left-color: var(--color-success);
}

.toast.toast-error {
  border-left-color: var(--color-danger);
}

.toast.toast-warning {
  border-left-color: var(--color-warning);
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* モーダル */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  transform: translateY(20px) scale(0.97);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.active .modal-card {
  transform: translateY(0) scale(1);
}

.modal-header {
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.modal-close-btn {
  font-size: 1.4rem;
  line-height: 1;
  color: var(--color-text-muted);
  padding: 4px;
  border-radius: var(--radius-sm);
}

.modal-close-btn:hover {
  color: var(--color-text-main);
  background-color: var(--color-bg-subtle);
}

.modal-body {
  padding: 24px;
  flex: 1;
}

.modal-footer {
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg-subtle);
}

/* スピナー */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid rgba(124, 147, 195, 0.2);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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