/* Praeternum Registration Forms */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&display=swap');

:root {
  --color-bg: #f7f8fa;
  --color-surface: #ffffff;
  --color-primary: #1a1a1a;
  --color-primary-hover: #333333;
  --color-primary-light: #f1f5f9;
  --color-text: #1e293b;
  --color-text-sub: #64748b;
  --color-border: #d1d5db;
  --color-border-focus: #1a1a1a;
  --color-error: #dc2626;
  --color-error-bg: #fef2f2;
  --color-success: #16a34a;
  --color-success-bg: #f0fdf4;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-lg: 0 4px 24px rgba(0,0,0,0.10);
}

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

body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
}

/* ─── Header ─── */
.site-header {
  background: #ffffff;
  border-bottom: 2px solid #1a1a1a;
  padding: 14px 28px;
  display: flex;
  align-items: center;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-img {
  height: 32px;
  width: auto;
  object-fit: contain;
}

.logo-text {
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 700;
  font-size: 20px;
  color: #1a1a1a;
  letter-spacing: 2px;
}

/* ─── Main Container ─── */
.container {
  max-width: 640px;
  margin: 40px auto;
  padding: 0 20px;
}

.form-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 40px 36px;
}

@media (max-width: 640px) {
  .container { margin: 20px auto; }
  .form-card { padding: 28px 20px; }
  .site-header { padding: 12px 16px; }
  .logo-text { font-size: 17px; }
}

.form-card h1 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 4px;
}

.form-card .subtitle {
  color: var(--color-text-sub);
  font-size: 14px;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

/* ─── Form Elements ─── */
.form-section { margin-bottom: 28px; }

.form-section h2 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.form-section h2::before {
  content: '';
  display: inline-block;
  width: 3px;
  height: 18px;
  background: var(--color-primary);
  border-radius: 2px;
}

.field { margin-bottom: 18px; }

.field label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 6px;
}

.field label .required {
  color: var(--color-error);
  font-size: 12px;
  margin-left: 4px;
}

.field input[type="text"],
.field input[type="email"],
.field input[type="tel"],
.field textarea,
.field select {
  width: 100%;
  padding: 10px 14px;
  font-size: 15px;
  font-family: inherit;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #fff;
  color: var(--color-text);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(26,26,26,0.08);
}

.field textarea { resize: vertical; min-height: 80px; }

.field .hint { font-size: 12px; color: var(--color-text-sub); margin-top: 4px; }

.field .error-msg { font-size: 12px; color: var(--color-error); margin-top: 4px; display: none; }

.field.has-error input,
.field.has-error textarea,
.field.has-error select { border-color: var(--color-error); }

.field.has-error .error-msg { display: block; }

/* ─── Checkbox Group ─── */
.checkbox-group {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 8px;
}

.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 400;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.checkbox-group label:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
}

.checkbox-group input[type="checkbox"] {
  accent-color: var(--color-primary);
  width: 16px;
  height: 16px;
}

/* ─── Agreement ─── */
.agreement-box {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
  max-height: 200px;
  overflow-y: auto;
  font-size: 13px;
  line-height: 1.8;
  color: var(--color-text-sub);
}

.agreement-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 12px;
}

.agreement-check input[type="checkbox"] {
  accent-color: var(--color-primary);
  width: 18px;
  height: 18px;
  margin-top: 2px;
  flex-shrink: 0;
}

.agreement-check label { font-size: 14px; font-weight: 500; cursor: pointer; }

/* ─── Submit ─── */
.submit-area { margin-top: 32px; }

.btn-submit {
  display: block;
  width: 100%;
  padding: 14px;
  font-size: 16px;
  font-weight: 700;
  font-family: inherit;
  color: #fff;
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.btn-submit:hover:not(:disabled) { background: var(--color-primary-hover); }
.btn-submit:active:not(:disabled) { transform: scale(0.99); }
.btn-submit:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-submit.loading { position: relative; color: transparent; }

.btn-submit.loading::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 22px; height: 22px;
  margin: -11px 0 0 -11px;
  border: 3px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* ─── Result ─── */
.result-msg { display: none; padding: 16px 20px; border-radius: var(--radius); font-size: 14px; margin-top: 16px; }
.result-msg.success { display: block; background: var(--color-success-bg); color: var(--color-success); border: 1px solid #bbf7d0; }
.result-msg.error { display: block; background: var(--color-error-bg); color: var(--color-error); border: 1px solid #fecaca; }

/* ─── Footer ─── */
.site-footer { text-align: center; padding: 32px 20px; color: var(--color-text-sub); font-size: 12px; }
.site-footer .footer-links { margin-bottom: 8px; }
.site-footer .footer-links a {
  color: var(--color-text-sub);
  text-decoration: none;
  margin: 0 10px;
  font-size: 12px;
}
.site-footer .footer-links a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

/* ─── Confirmation Table ─── */
.confirm-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 28px;
}

.confirm-table th,
.confirm-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
  vertical-align: top;
}

.confirm-table th {
  width: 35%;
  color: var(--color-text-sub);
  font-weight: 500;
  background: var(--color-bg);
}

.confirm-table td {
  color: var(--color-text);
  font-weight: 500;
  word-break: break-all;
}

.confirm-buttons {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.confirm-buttons .btn-submit {
  flex: 1;
}

.btn-back {
  flex: 0 0 auto;
  padding: 14px 24px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  color: var(--color-text-sub);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s;
}

.btn-back:hover { background: var(--color-bg); }
.btn-back:disabled { opacity: 0.5; cursor: not-allowed; }

/* ─── Completion Screen ─── */
.complete-screen {
  text-align: center;
  padding: 80px 20px 60px;
}

.complete-logo {
  height: 64px;
  width: auto;
  margin-bottom: 32px;
}

.complete-msg {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.complete-sub {
  font-size: 15px;
  color: var(--color-text-sub);
  line-height: 1.8;
  margin-bottom: 40px;
}

.btn-close {
  display: inline-block;
  padding: 12px 32px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  color: var(--color-text-sub);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s;
}

.btn-close:hover { background: var(--color-bg); }

.close-fallback {
  margin-top: 16px;
  font-size: 13px;
  color: var(--color-text-sub);
}

@media (max-width: 640px) {
  .confirm-buttons { flex-direction: column-reverse; }
  .confirm-table th { width: 40%; }
  .complete-screen { padding: 40px 16px; }
}