/* ── Variables ───────────────────────────────────────────────────────────── */
:root {
  --color-primary: #e63232;
  --color-on-primary: #ffffff;
  --color-primary-container: #ffdad6;
  --color-on-primary-container: #410002;
  --color-surface: #fffbff;
  --color-on-surface: #201a19;
  --color-surface-variant: #ede7e5;
  --color-on-surface-variant: #534341;
  --color-outline: #857370;
  --color-error: #ba1a1a;
}

/* ── Reset & Base ────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

body {
  font-family: 'Roboto', sans-serif;
  background-color: #f0eae9;
  color: var(--color-on-surface);
  min-height: 100vh;
}

a { color: var(--color-primary); }

/* ── Header ──────────────────────────────────────────────────────────────── */
.site-header {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  padding: 32px 24px;
}
.site-header__inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 20px;
}
.site-header__logo {
  height: 48px;
  width: auto;
  flex-shrink: 0;
}
.site-header__text {
  flex-shrink: 0;
}
.site-header__title {
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.3;
}
.site-header__subtitle {
  font-size: 1rem;
  font-weight: 300;
  margin-top: 4px;
  opacity: 0.9;
}
.site-header__spacer {
  flex: 1;
}
.site-header__partners {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

/* ── Page Layout ─────────────────────────────────────────────────────────── */
.page-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

/* ── Form Card ───────────────────────────────────────────────────────────── */
.form-card {
  background: var(--color-surface);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
}
.form-card__title {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 20px;
}

/* ── Field Rows ──────────────────────────────────────────────────────────── */
.field-row {
  margin-bottom: 16px;
}
.field-row--two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* ── Text Field (floating label) ─────────────────────────────────────────── */
.text-field {
  position: relative;
  background: var(--color-surface-variant);
  border-radius: 4px 4px 0 0;
  border-bottom: 1px solid var(--color-outline);
  width: 100%;
  transition: border-color 0.15s, border-width 0.15s;
}
.text-field:focus-within {
  border-bottom: 2px solid var(--color-primary);
}
.text-field input {
  display: block;
  width: 100%;
  padding: 22px 12px 8px;
  border: none;
  background: transparent;
  font-size: 1rem;
  font-family: 'Roboto', sans-serif;
  color: var(--color-on-surface);
  outline: none;
  min-height: 56px;
}
.text-field label {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  color: var(--color-on-surface-variant);
  pointer-events: none;
  transition: top 0.15s ease, font-size 0.15s ease, color 0.15s ease, transform 0.15s ease;
}
.text-field input:focus + label,
.text-field input:not(:placeholder-shown) + label {
  top: 10px;
  transform: none;
  font-size: 0.75rem;
  color: var(--color-primary);
}

/* ── Section Divider ─────────────────────────────────────────────────────── */
.section-divider {
  border: none;
  border-top: 1px solid var(--color-surface-variant);
  margin: 20px 0;
}

/* ── Radio Group ─────────────────────────────────────────────────────────── */
.radio-group {
  margin-bottom: 20px;
}
.radio-group__label {
  font-size: 0.875rem;
  color: var(--color-on-surface-variant);
  font-weight: 500;
  margin-bottom: 8px;
}
.radio-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  cursor: pointer;
  padding: 4px 0;
  user-select: none;
}
.radio-label input[type="radio"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  cursor: pointer;
  flex-shrink: 0;
}

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn-filled {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-on-primary);
  border: none;
  border-radius: 20px;
  padding: 10px 24px;
  font-size: 0.875rem;
  font-weight: 500;
  font-family: 'Roboto', sans-serif;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  transition: box-shadow 0.2s;
}
.btn-filled:hover {
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}
.btn-filled:disabled {
  opacity: 0.38;
  cursor: not-allowed;
  box-shadow: none;
}
.btn-outlined {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: 20px;
  padding: 10px 24px;
  font-size: 0.875rem;
  font-weight: 500;
  font-family: 'Roboto', sans-serif;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s;
}
.btn-outlined:hover {
  background: rgba(230, 50, 50, 0.08);
}

/* ── Authors ─────────────────────────────────────────────────────────────── */
.authors-section {
  margin-bottom: 20px;
}
.authors-section__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.author-entry {
  border: 1px solid var(--color-surface-variant);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 8px;
}
.author-entry__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.author-entry__label {
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-on-surface-variant);
}
.btn-text {
  background: none;
  border: none;
  color: var(--color-primary);
  font-size: 0.875rem;
  font-weight: 500;
  font-family: 'Roboto', sans-serif;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
}
.btn-text:hover {
  background: rgba(230, 50, 50, 0.08);
}
.btn-remove-author {
  background: none;
  border: none;
  color: var(--color-outline);
  font-size: 0.8rem;
  font-family: 'Roboto', sans-serif;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
}
.btn-remove-author:hover {
  color: var(--color-error);
  background: rgba(186, 26, 26, 0.08);
}

/* ── File Upload ─────────────────────────────────────────────────────────── */
.file-upload {
  margin-top: 4px;
}
.file-upload__label {
  font-size: 0.875rem;
  color: var(--color-on-surface-variant);
  font-weight: 500;
  margin-bottom: 8px;
}
.file-upload__control {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.file-upload__name {
  font-size: 0.875rem;
  color: var(--color-on-surface-variant);
}
.field-hint {
  font-weight: 300;
  color: var(--color-outline);
}
.inline-error {
  font-size: 0.8rem;
  color: var(--color-error);
  margin-top: 6px;
}

/* ── Fee Display ─────────────────────────────────────────────────────────── */
.fee-display {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
  background: var(--color-primary-container);
  color: var(--color-on-primary-container);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 20px;
}
.fee-display__label {
  font-size: 0.875rem;
}
.fee-display__amount {
  font-size: 1.5rem;
  font-weight: 700;
}
.fee-display__period {
  font-size: 0.8rem;
  opacity: 0.75;
}

/* ── Payment Info ────────────────────────────────────────────────────────── */
.payment-info {
  background: var(--color-surface-variant);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 12px;
  font-size: 0.9rem;
  line-height: 1.8;
}
.payment-note {
  font-size: 0.85rem;
  color: var(--color-on-surface-variant);
  margin-top: 8px;
  line-height: 1.5;
}

/* ── Submit Area ─────────────────────────────────────────────────────────── */
.submit-area {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
  margin-top: 8px;
}
.form-errors {
  width: 100%;
  background: #fce8e8;
  color: var(--color-error);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 0.875rem;
  line-height: 1.7;
  white-space: pre-line;
}

/* ── Success Panel ───────────────────────────────────────────────────────── */
.success-panel {
  background: var(--color-surface);
  border-radius: 12px;
  padding: 48px 24px;
  text-align: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}
.success-panel__icon {
  font-size: 3rem;
  color: var(--color-primary);
  margin-bottom: 16px;
}
.success-panel h2 {
  font-size: 1.4rem;
  font-weight: 500;
  margin-bottom: 12px;
}
.success-panel p {
  color: var(--color-on-surface-variant);
  margin-bottom: 8px;
  line-height: 1.5;
}
.success-panel__id {
  margin-top: 16px;
  font-size: 0.9rem;
}

/* ── Print Summary (hidden on screen) ───────────────────────────────────── */
#printSummary {
  display: none;
}

/* ── Print ───────────────────────────────────────────────────────────────── */
@media print {
  body { background: white; }

  #registrationForm,
  #successPanel { display: none !important; }

  .site-header {
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  .page-main { padding: 0; max-width: none; }

  #printSummary {
    display: block;
    font-family: 'Roboto', sans-serif;
    color: #000;
    padding: 24px;
  }

  .print-header {
    border-bottom: 2px solid #e63232;
    padding-bottom: 12px;
    margin-bottom: 24px;
  }
  .print-header h1 {
    font-size: 1.1rem;
    font-weight: 700;
    color: #e63232;
  }
  .print-header h2 {
    font-size: 0.95rem;
    font-weight: 400;
    margin-top: 4px;
  }
  .print-meta {
    font-size: 0.8rem;
    color: #555;
    margin-top: 8px;
  }

  .print-section {
    margin-bottom: 20px;
    break-inside: avoid;
  }
  .print-section h3 {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #e63232;
    border-bottom: 1px solid #ddd;
    padding-bottom: 4px;
    margin-bottom: 10px;
  }
  .print-row {
    display: flex;
    gap: 8px;
    margin-bottom: 5px;
    font-size: 0.875rem;
  }
  .print-row dt {
    width: 180px;
    flex-shrink: 0;
    color: #555;
    font-weight: 500;
  }
  .print-row dd { flex: 1; }

  .print-footer {
    margin-top: 32px;
    padding-top: 10px;
    border-top: 1px solid #ddd;
    font-size: 0.8rem;
    color: #555;
  }
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .field-row--two {
    grid-template-columns: 1fr;
  }
  .site-header__title {
    font-size: 1.2rem;
  }
  .form-card {
    padding: 20px 16px;
  }
}