/* ========================================
   Coffee App — Japanese Minimal B&W
   ======================================== */

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

:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-2: #f5f5f3;
  --border: #e0e0de;
  --border-dark: #bbbbb8;

  --text: #111110;
  --text-secondary: #777774;
  --text-dim: #b8b8b4;

  --success: #3a6b38;
  --error: #8b3a3a;

  --radius: 4px;
  --radius-lg: 6px;
  --max-width: 640px;
}

html { font-size: 16px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100dvh;
}

/* === Layout === */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 1.25rem;
}

/* === Header === */
header {
  text-align: center;
  padding: 2rem 0 1.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.site-logo {
  display: block;
  margin: 0 auto 1rem;
  width: 56px;
  height: 56px;
}

header h1 {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text);
}

header h1 a { color: inherit; text-decoration: none; }

header p {
  color: var(--text-secondary);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-top: 0.25rem;
}

/* === Card === */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 0.875rem;
}

.card h2 {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.875rem;
}

.card h3 {
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1.125rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: opacity 0.15s;
  text-decoration: none;
  font-family: inherit;
}

.btn:hover { opacity: 0.7; }
.btn:disabled { opacity: 0.3; cursor: not-allowed; }

.btn-primary {
  background: var(--text);
  color: var(--bg);
}

.btn-accent {
  background: var(--text);
  color: var(--bg);
}

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

.btn-outline:hover { background: var(--surface-2); opacity: 1; }

.btn-danger {
  background: transparent;
  color: var(--error);
  border-color: rgba(139,58,58,0.25);
}

.btn-sm { padding: 0.35rem 0.625rem; font-size: 0.75rem; }
.btn-block { width: 100%; }

/* === Forms === */
.form-group { margin-bottom: 0.875rem; }

.form-group label {
  display: block;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.3rem;
  color: var(--text-secondary);
}

input[type="text"],
input[type="number"],
input[type="date"],
input[type="url"],
input[type="password"],
select,
textarea {
  width: 100%;
  padding: 0.5rem 0.625rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-family: inherit;
  color: var(--text);
  transition: border-color 0.15s;
  -webkit-appearance: none;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--text);
}

input::placeholder, textarea::placeholder {
  color: var(--text-dim);
}

select option { background: var(--bg); }
textarea { resize: vertical; min-height: 2.5rem; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.form-row-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.75rem;
}

/* === Badge === */
.badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: 2px;
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--border-dark);
  color: var(--text-secondary);
  background: var(--surface-2);
}

.badge-primary { border-color: var(--border-dark); }
.badge-success {
  border-color: rgba(58,107,56,0.3);
  color: var(--success);
  background: rgba(58,107,56,0.06);
}

/* === Status Bar === */
.status-bar {
  display: flex;
  gap: 3px;
  margin-bottom: 1.25rem;
}

.status-step {
  flex: 1;
  height: 2px;
  background: var(--border);
  transition: background 0.3s;
}

.status-step.active { background: var(--text); }
.status-step.done { background: var(--text-secondary); }

/* === Table === */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

th, td {
  padding: 0.5rem 0.625rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  white-space: nowrap;
}

th {
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  background: var(--surface-2);
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--surface-2); }

.comparison-table th:first-child,
.comparison-table td:first-child {
  position: sticky;
  left: 0;
  background: var(--surface);
  z-index: 1;
  border-right: 1px solid var(--border);
}

.comparison-table th:first-child {
  background: var(--surface-2);
  z-index: 2;
}

.correct { color: var(--success); font-weight: 600; }
.incorrect { color: var(--error); }

/* === Bean Card === */
.bean-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.625rem 0.875rem;
  margin-bottom: 0.5rem;
}

.bean-card .bean-label {
  font-weight: 600;
  font-size: 0.875rem;
}

.bean-card .bean-name {
  color: var(--text-secondary);
  font-size: 0.8125rem;
}

/* === Phase Info === */
.phase-info {
  padding: 0.625rem 0.875rem;
  background: var(--surface-2);
  border-left: 2px solid var(--text-secondary);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 0.875rem;
}

/* === Share Link === */
.share-link {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  margin-bottom: 0.875rem;
}

.share-link code {
  flex: 1;
  word-break: break-all;
  font-size: 0.7rem;
  color: var(--text-secondary);
  font-family: 'SF Mono', 'Courier New', monospace;
}

/* === Tab Bar === */
.tab-bar {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 0.875rem;
}

.tab-btn {
  flex: 1;
  padding: 0.55rem 0;
  background: var(--surface);
  border: none;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  font-family: inherit;
}

.tab-btn + .tab-btn {
  border-left: 1px solid var(--border);
}

.tab-btn.active {
  background: var(--text);
  color: var(--bg);
}

.tab-btn:not(.active):hover {
  background: var(--surface-2);
}

/* === Answer Row === */
.answer-row {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: 0.5rem;
}

.answer-row .cup-num {
  font-weight: 600;
  font-size: 0.8125rem;
  min-width: 2rem;
  color: var(--text-secondary);
}

/* === Participant List === */
.participant-list {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* === Toast === */
.toast {
  position: fixed;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.5rem 1.125rem;
  border-radius: var(--radius);
  font-size: 0.8rem;
  font-weight: 500;
  z-index: 9999;
  opacity: 0;
  transition: opacity 0.25s;
  pointer-events: none;
  white-space: nowrap;
}

.toast.show { opacity: 1; }
.toast-success { background: var(--text); color: var(--bg); }
.toast-error { background: var(--error); color: #fff; }

/* === Loading === */
.loading {
  text-align: center;
  padding: 2rem;
  color: var(--text-dim);
  font-size: 0.8rem;
}

.spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 1.5px solid var(--border);
  border-top-color: var(--text);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-right: 0.375rem;
  vertical-align: middle;
}

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

/* === Empty === */
.empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-dim);
}

.empty p { font-size: 0.8125rem; }

/* === Overlay / Modal === */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  width: 100%;
  max-width: 480px;
  max-height: 92vh;
  overflow-y: auto;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}

.modal h2 {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  padding-bottom: 0.625rem;
  border-bottom: 1px solid var(--border);
}

/* === Divider === */
.divider {
  height: 1px;
  background: var(--border);
  margin: 1rem 0;
}

/* === Utility === */
.hidden { display: none !important; }
.text-center { text-align: center; }
.text-secondary { color: var(--text-secondary); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.gap-sm { gap: 0.5rem; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }

/* === Session Card (homepage list) === */
.session-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

.session-card:last-child { border-bottom: none; }

.session-card-info { flex: 1; min-width: 0; }

.session-card-title {
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.session-card-meta {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.125rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.session-card-date {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 0.125rem;
}

.session-lock {
  font-size: 0.7rem;
}

/* === Responsive === */
@media (max-width: 480px) {
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
  header { padding: 1.5rem 0 1.25rem; }
}