/* CEC 講師契約管理システム - Modern Minimal Design */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Noto+Sans+JP:wght@400;500;600;700&display=swap');

:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --accent: #f59e0b;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --success: #10b981;
  --success-light: #ecfdf5;
  --danger: #ef4444;
  --danger-light: #fef2f2;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 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(0,0,0,0.06), 0 2px 4px -2px rgba(0,0,0,0.04);
  --transition: 0.2s ease;
}

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

body {
  font-family: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ===== Header ===== */
.header {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.header-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}
.header-nav {
  display: flex;
  gap: 4px;
}
.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  transition: all var(--transition);
}
.nav-link:hover {
  color: var(--text);
  background: var(--border-light);
}
.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
}

/* ===== Page Header ===== */
.page-header {
  padding: 48px 24px 32px;
  text-align: center;
}
.page-header h1,
.page-header h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.page-header p {
  color: var(--text-secondary);
  font-size: 14px;
}

/* ===== Container ===== */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px 48px;
}
.container-wide {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px 48px;
}

/* ===== Card ===== */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  transition: all var(--transition);
}
.card:hover {
  border-color: #cbd5e1;
  box-shadow: var(--shadow-md);
}
.card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

/* ===== Form Styles ===== */
.form-section {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
}
.section-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.form-row.full {
  grid-template-columns: 1fr;
}
@media (max-width: 640px) {
  .form-row { grid-template-columns: 1fr; }
}
.form-group {
  display: flex;
  flex-direction: column;
}
.form-group label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.form-group.required label::after {
  content: " *";
  color: var(--danger);
}
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="date"],
.form-group input[type="tel"],
.form-group input[type="number"],
.form-group textarea,
.form-group select {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: var(--card-bg);
  transition: all var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
.form-group input[readonly] {
  background: var(--border-light);
  color: var(--text-secondary);
  cursor: default;
}
.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

/* Radio & Checkbox */
.radio-group,
.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 4px;
}
.radio-group label,
.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-weight: 400;
  color: var(--text);
  font-size: 14px;
}
.radio-group input[type="radio"],
.checkbox-group input[type="checkbox"] {
  cursor: pointer;
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
}

/* Station row */
.station-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Conditional fields */
.conditional-field {
  display: none;
}
.conditional-field.show {
  display: flex;
}

/* ===== Contract Display ===== */
.contract-display {
  max-height: 480px;
  overflow-y: auto;
  padding: 24px;
  background: var(--border-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  line-height: 1.8;
  font-size: 14px;
}
.contract-display::-webkit-scrollbar { width: 6px; }
.contract-display::-webkit-scrollbar-track { background: transparent; }
.contract-display::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 3px;
}
.article {
  margin-bottom: 20px;
  padding: 16px;
  background: var(--card-bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.article-title {
  font-weight: 600;
  font-size: 14px;
  color: var(--text);
  margin-bottom: 8px;
}
.article-content {
  color: var(--text-secondary);
  font-size: 13px;
  white-space: pre-wrap;
  word-wrap: break-word;
}

/* ===== Agreement Boxes ===== */
.agreement-box {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  margin-bottom: 12px;
  transition: border-color var(--transition);
}
.agreement-box:hover {
  border-color: var(--primary);
}
.agreement-box.dbs {
  border-left: 3px solid var(--warning);
  background: var(--warning-light);
}
.agreement-box.privacy {
  border-left: 3px solid var(--primary);
  background: var(--primary-light);
}
.agreement-label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
}
.agreement-label input[type="checkbox"] {
  margin-top: 3px;
  width: 18px;
  height: 18px;
  cursor: pointer;
  flex-shrink: 0;
  accent-color: var(--primary);
}
.agreement-text {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text);
}
.agreement-text a {
  color: var(--primary);
  text-decoration: none;
}
.agreement-text a:hover {
  text-decoration: underline;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  gap: 6px;
}
.btn-primary {
  background: var(--primary);
  color: white;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  border: none;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
}
.btn-primary:disabled {
  background: var(--text-muted);
  cursor: not-allowed;
}
.btn-secondary {
  background: var(--border-light);
  color: var(--text);
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-secondary:hover {
  background: var(--border);
}
.btn-success {
  background: var(--success);
  color: white;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  border: none;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-success:hover { background: #059669; }
.btn-copy {
  background: var(--text);
  color: white;
  padding: 6px 12px;
  border-radius: 6px;
  border: none;
  font-size: 12px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-copy:hover { background: #334155; }
.btn-copy.copied { background: var(--success); }

.form-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 24px;
}
.edit-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 16px;
}

/* ===== Alert ===== */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 13px;
  font-weight: 500;
}
.alert-success {
  background: var(--success-light);
  color: #065f46;
  border: 1px solid #a7f3d0;
}
.alert-error {
  background: var(--danger-light);
  color: #991b1b;
  border: 1px solid #fecaca;
}
.alert-info {
  background: var(--primary-light);
  color: #1e40af;
  border: 1px solid #bfdbfe;
}
.alert-hidden { display: none; }

/* ===== Info Table ===== */
.info-table {
  width: 100%;
  border-collapse: collapse;
}
.info-table tr {
  border-bottom: 1px solid var(--border);
}
.info-table tr:last-child { border-bottom: none; }
.info-table td {
  padding: 12px 16px;
  font-size: 13px;
}
.info-table td:first-child {
  width: 30%;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--border-light);
}
.info-table td.section-divider {
  width: 100%;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  background: transparent;
  padding: 28px 16px 10px;
  border-bottom: none;
}
.info-table input,
.info-table textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
  color: var(--text);
  transition: all var(--transition);
}
.info-table input[readonly],
.info-table textarea[readonly] {
  background: var(--border-light);
  cursor: default;
}
.info-table input:focus,
.info-table textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ===== Tabs ===== */
.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  background: var(--border-light);
  padding: 4px;
  border-radius: var(--radius-sm);
}
.tab-button {
  padding: 8px 20px;
  background: transparent;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.tab-button.active {
  background: var(--card-bg);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}
.tab-button:hover:not(.active) {
  color: var(--text);
}
.tab-content {
  display: none;
  animation: fadeIn 0.2s;
}
.tab-content.active { display: block; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ===== Status Badges ===== */
.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.status-completed { background: var(--success-light); color: #065f46; }
.status-pending { background: var(--warning-light); color: #92400e; }
.status-rejected { background: var(--danger-light); color: #991b1b; }

/* ===== Contract Cards ===== */
.contracts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.contract-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.contract-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}
.contract-card-item {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 13px;
}
.contract-card-label { color: var(--text-secondary); }
.contract-card-value { font-weight: 500; color: var(--text); }

/* ===== Loading ===== */
.loading {
  display: none;
  text-align: center;
  padding: 32px 20px;
  color: var(--text-secondary);
  font-size: 13px;
}
.loading.show { display: block; }
.spinner {
  width: 28px;
  height: 28px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 0 auto 10px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Homepage ===== */
.hero {
  text-align: center;
  padding: 64px 24px 48px;
}
.hero h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}
.hero p {
  color: var(--text-secondary);
  font-size: 15px;
}
.cards-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  padding: 0 24px 48px;
  max-width: 960px;
  margin: 0 auto;
}
.home-card {
  display: flex;
  flex-direction: column;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-decoration: none;
  color: inherit;
  transition: all var(--transition);
}
.home-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.home-card .icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
}
.home-card .icon.blue { background: var(--primary-light); }
.home-card .icon.green { background: var(--success-light); }
.home-card .icon.amber { background: var(--warning-light); }
.home-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.home-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  flex: 1;
}
.home-card .arrow {
  margin-top: 16px;
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
}

/* ===== Login ===== */
.login-container {
  min-height: calc(100vh - 120px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-box {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-md);
}
.login-header {
  text-align: center;
  margin-bottom: 28px;
}
.login-header h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.login-header p {
  color: var(--text-secondary);
  font-size: 13px;
}

/* ===== Complete Page ===== */
.complete-container {
  min-height: calc(100vh - 120px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.complete-box {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 48px 32px;
  text-align: center;
  max-width: 480px;
  width: 100%;
}
.success-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--success-light);
  color: var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
  margin: 0 auto 20px;
  animation: scaleIn 0.4s ease-out;
}
@keyframes scaleIn {
  0% { transform: scale(0); opacity: 0; }
  70% { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}
.complete-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.complete-message {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.6;
}
.complete-details {
  background: var(--border-light);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 24px;
  text-align: left;
}
.detail-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.detail-item:last-child { border-bottom: none; }
.detail-label { color: var(--text-secondary); }
.detail-value { font-weight: 500; color: var(--text); }
.info-box {
  background: var(--primary-light);
  border-left: 3px solid var(--primary);
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  text-align: left;
  margin-bottom: 20px;
  font-size: 13px;
  color: var(--text);
  line-height: 1.6;
}
.button-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ===== Mypage Header ===== */
.mypage-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}
.mypage-header h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
}
.btn-logout {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  transition: all var(--transition);
}
.btn-logout:hover {
  background: var(--danger-light);
  border-color: var(--danger);
  color: var(--danger);
}

/* ===== Admin ===== */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}
.info-item {
  display: flex;
  flex-direction: column;
}
.info-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 4px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.info-value {
  font-size: 14px;
  color: var(--text);
  font-weight: 500;
}
.instructor-info {
  background: var(--border-light);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin-bottom: 20px;
}
.url-card {
  background: var(--border-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 12px;
}
.url-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}
.url-display {
  display: flex;
  align-items: center;
  gap: 8px;
}
.url-text {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 12px;
  color: var(--text);
  background: var(--card-bg);
  padding: 10px 12px;
  border-radius: 6px;
  overflow-x: auto;
  flex: 1;
  word-break: break-all;
  border: 1px solid var(--border);
}
.qr-section {
  text-align: center;
  margin-top: 16px;
}
.qr-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: block;
}
.qr-code {
  display: inline-block;
  padding: 8px;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

/* ===== Section Info ===== */
.info-section {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.section-header h2 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

/* ===== No Content ===== */
.no-contracts {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-secondary);
  font-size: 14px;
}

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 24px;
  font-size: 12px;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  margin-top: 48px;
}

/* ===== Result Section ===== */
.result-section {
  display: none;
}
.result-section.show {
  display: block;
  animation: slideUp 0.3s ease-out;
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .header-container { flex-direction: column; height: auto; padding: 12px 0; gap: 8px; }
  .header-nav { width: 100%; justify-content: center; }
  .hero h2 { font-size: 22px; }
  .cards-container { grid-template-columns: 1fr; }
  .station-row { grid-template-columns: 1fr; }
  .login-box { padding: 32px 24px; }
  .info-grid { grid-template-columns: 1fr 1fr; }
}