.submission-page {
  padding: 5rem 0 6rem;
  display: grid;
  gap: 3rem;
}

.submission-section {
  padding: 4rem 1.5rem;
  width: min(100%, var(--max-width));
  margin-left: auto;
  margin-right: auto;
}

@media (max-width: 768px) {
  .submission-section {
    padding: 3rem 1.5rem;
  }
}

@media (max-width: 640px) {
  .submission-section {
    padding: 2.5rem 1.5rem;
  }
}

.submission-section h2,
.submission-section h3 {
  font-size: 1.5rem; /* text-2xl (24px) - Figma */
  font-weight: 700;
  color: #1a2238;
  margin: 0 0 2rem;
  letter-spacing: -0.025em;
}

/* Category Cards */
.category-card {
  position: relative;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-top: 8px solid #1a2238; /* デフォルト: 濃紺 */
  border-radius: 1rem;
  box-shadow: 0 4px 12px rgba(17, 24, 39, 0.08);
  margin: 3rem 0;
  overflow: hidden;
}

.card-watermark {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  opacity: 0.04;
  pointer-events: none;
  z-index: 0;
}

.card-header {
  position: relative;
  z-index: 1;
  padding: 2rem 2.5rem 1.5rem;
  border-bottom: 1px solid #e5e7eb;
}

.card-header h3 {
  font-size: 1.875rem; /* text-3xl (30px) - Figma */
  font-weight: 700;
  color: #1a2238;
  margin: 0.75rem 0 0.5rem;
  letter-spacing: -0.025em;
}

.card-header p {
  color: #6b7280;
  margin: 0.5rem 0 0;
  font-size: 1.125rem; /* text-lg (18px) - Figma */
}

.card-body {
  position: relative;
  z-index: 1;
  padding: 2rem 2.5rem;
}

.card-body p {
  font-size: 1.125rem; /* text-lg (18px) - Figma */
  color: #374151;
  line-height: 1.625;
}

.card-body--two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.card-body--two-column .left-col,
.card-body--two-column .right-col {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.card-footer {
  position: relative;
  z-index: 1;
  padding: 0 1.5rem 1.5rem;
  border-top: 1px solid #e5e7eb;
  background: #f9fafb;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* Nested Cards */
.nested-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  padding: 2rem 2.5rem;
}
.nested-card {
  background: #fff;
  border: 2px solid #e5e7eb;
  border-top: 4px solid #007bff; /* デフォルト: 青 */
  border-radius: 0.75rem;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.nested-card-header {
  padding: 1.5rem;
  background: linear-gradient(to bottom, rgba(0, 123, 255, 0.05), white);
  border-bottom: 1px solid #e5e7eb;
}

.nested-card-header h4 {
  font-size: 1.25rem; /* text-xl (20px) - Figma */
  font-weight: 700;
  color: #1a2238;
  margin: 0 0 0.5rem;
  letter-spacing: -0.025em;
}

.nested-card-header p {
  color: #6b7280;
  margin: 0;
  font-size: 0.875rem; /* text-sm (14px) - Figma */
}

.nested-card-content {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Callouts */
.callout {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem; /* p-4 - Figma */
  border-radius: 0.5rem; /* rounded-lg */
  margin: 1rem 0;
}

.callout svg {
  flex-shrink: 0;
  margin-top: 0.125rem;
}

.callout-blue {
  background: rgba(0, 123, 255, 0.08);
  border: 1px solid rgba(0, 123, 255, 0.2);
  color: #007bff;
}

.callout-gray {
  background: #f3f4f6;
  border: 1px solid #d1d5db;
  color: #4b5563;
}

.callout strong {
  display: block;
  font-weight: 700;
  margin-bottom: 0.25rem;
  font-size: 0.875rem; /* text-sm for nested cards */
}

.callout span {
  display: block;
  font-size: 0.75rem; /* text-xs (12px) - Figma */
  margin-top: 0.25rem;
}

.submission-section + .submission-section {
  margin-top: 1rem;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px; /* rounded-full */
  font-size: 0.875rem; /* text-sm (14px) - Figma */
  font-weight: 500;
  line-height: 1;
}

.badge-blue {
  background: rgba(0, 123, 255, 0.1);
  color: #007bff;
  border: 1px solid rgba(0, 123, 255, 0.2);
}

.badge-green {
  background: rgba(58, 191, 142, 0.1);
  color: #10b981;
  border: 1px solid rgba(58, 191, 142, 0.2);
}

.badge-reviewed {
  background: linear-gradient(135deg, rgba(0, 123, 255, 0.15), rgba(0, 123, 255, 0.08));
  color: #007bff;
  border: 1px solid rgba(0, 123, 255, 0.25);
  font-weight: 500;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1.5rem; /* py-2 px-6 - 縦幅を小さく */
  border-radius: 0.5rem;
  font-size: 1rem; /* text-base (16px) - Figma */
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: #007bff;
  color: #fff;
  border-color: #007bff;
}

.btn-primary:hover {
  background: #0056b3;
  border-color: #0056b3;
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
}

.btn-accent {
  background: #10b981;
  color: #fff;
  border-color: #10b981;
}

.btn-accent:hover {
  background: #059669;
  border-color: #059669;
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

/* Comparison Table */
.comparison-table-wrapper {
  overflow-x: auto;
  margin: 2rem 0;
  border-radius: 0.75rem;
  border: 1px solid #e5e7eb;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 600px;
}

.comparison-table thead {
  background: linear-gradient(to bottom, #f9fafb, #f3f4f6);
}

.comparison-table th {
  padding: 1rem 1.5rem;
  text-align: left;
  font-weight: 600;
  color: #1a2238;
  border-bottom: 2px solid #e5e7eb;
  font-size: 0.9375rem;
}

.comparison-table td {
  padding: 1rem 1.5rem;
  color: #374151;
  border-bottom: 1px solid #e5e7eb;
  font-size: 0.9375rem;
}

.comparison-table tbody tr:last-child td {
  border-bottom: none;
}

.comparison-table tbody tr:hover {
  background: #f9fafb;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-weight: 500;
  font-size: 0.875rem;
}

.status-included {
  color: #10b981;
}

.status-excluded {
  color: #6b7280;
}

/* Details List */
.details-list {
  display: grid;
  gap: 1.25rem;
}

.details-list > div {
  display: grid;
  grid-template-columns: 120px 1fr; /* タイトルを左、説明を右に */
  gap: 1rem;
  align-items: start;
}

.details-list dt {
  font-size: 0.875rem; /* text-sm (14px) - Figma */
  font-weight: 700;
  color: #1a2238;
  margin: 0;
}

.details-list dd {
  font-size: 0.875rem; /* text-sm (14px) - Figma */
  color: #4b5563;
  margin: 0;
  line-height: 1.6;
}

.details-list dd.highlight {
  color: #007bff;
  font-weight: 700;
  font-size: 0.875rem; /* text-sm (14px) - Figma */
}

.text-xs {
  font-size: 0.75rem; /* 12px - Figma */
}

.text-gray-500 {
  color: #6b7280;
}

/* Format Requirements */
.format-requirements {
  margin-top: 1rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid #f3f4f6;
  border-radius: 0.5rem;
}

.format-requirements p {
  font-size: 0.75rem; /* text-xs (12px) - Figma */
  font-weight: 600;
  color: #1a2238;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.format-requirements ul {
  font-size: 0.75rem; /* text-xs (12px) - Figma */
  color: #4b5563;
  line-height: 1.5;
  list-style: disc;
  padding-left: 1.5rem;
  margin: 0;
}

.format-requirements li {
  margin-bottom: 0.375rem;
}

.format-requirements li:last-child {
  margin-bottom: 0;
}

/* Email Box */
.email-box {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.125rem; /* gap半分に */
  margin: 1rem 0; /* Calloutと同じmarginを追加 */
}

.email-box > div {
  display: flex;
  align-items: center;
  gap: 0.5rem; /* gap-2 */
  background: #f9fafb; /* bg-gray-50 */
  border: 1px solid #f3f4f6; /* border-gray-100 */
  border-radius: 0.5rem; /* rounded-lg - Calloutと同じ */
  padding: 0; /* パディング無し */
}

.email-box .label {
  font-size: 0.75rem; /* text-xs (12px) - Figma */
  font-weight: 500;
  color: #6b7280;
  margin-bottom: 0;
  display: block;
}

.email-box .address {
  flex: 1;
  font-family: 'IBM Plex Mono', 'Fira Code', Consolas, monospace;
  font-size: 0.875rem; /* text-sm (14px) - Notificationと同じ */
  font-weight: 500;
  color: #007bff;
  word-break: break-all;
}

.email-box .copy-btn {
  margin-left: auto;
  flex-shrink: 0;
  padding: 0.25rem;
  border-radius: 0.25rem;
  transition: all 0.2s;
}

.email-box .copy-btn:hover {
  background: #f3f4f6;
  color: #007bff;
}

.card-footer .btn {
  width: 100%;
}

.intro-text {
  font-size: 1.25rem; /* text-xl (20px) - Figma design */
  line-height: 1.7;
  color: #374151; /* text-gray-700 */
  margin: 0 0 2rem;
  max-width: 56rem; /* max-w-4xl - Figma design */
}

.section-heading h1 {
  font-size: 2.25rem; /* text-4xl (36px) - Figma の見出しサイズ */
  font-weight: 700;
  color: #1a2238;
  margin: 0 0 2rem;
  letter-spacing: -0.025em;
}

@media (min-width: 768px) {
  .section-heading h1 {
    font-size: 3rem; /* md:text-5xl (48px) */
  }
}

.section-heading__divider {
  height: 0.25rem; /* h-1 - Figmaに合わせる */
  width: 6rem; /* w-24 */
  background: #007bff;
  border-radius: 9999px; /* rounded-full */
  margin-bottom: 2rem;
}

.section-heading h3 {
  font-size: 1.5rem; /* text-2xl (24px) - Figma */
  font-weight: 700;
  color: #1a2238;
  margin: 0 0 2rem;
  letter-spacing: -0.025em;
}

.submission-section p {
  color: #4b5563;
  margin: 0 0 1rem;
}

.submission-table-wrapper {
  overflow-x: auto;
  margin-top: 1.5rem;
  border-radius: 1rem;
  border: 1px solid var(--color-border);
}

.submission-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

.submission-table thead th {
  background: #f3f4f6;
  color: var(--color-navy);
  font-weight: 600;
  padding: 1rem 1.5rem;
}

.submission-table tbody td {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--color-border);
  color: #4b5563;
}

.submission-details {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

.submission-callout {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: rgba(0, 123, 255, 0.08);
  border: 1px solid rgba(0, 123, 255, 0.12);
  border-radius: 1rem;
  padding: 1.25rem 1.5rem;
  color: var(--color-primary);
}

.submission-grid {
  display: grid;
  gap: 2rem;
}

.submission-grid.two-column {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.email-box {
  display: grid;
  gap: 0.75rem;
  background: #f9fafb;
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  padding: 1.25rem 1.5rem;
}

.email-box__address {
  font-family: 'IBM Plex Mono', 'Fira Code', Consolas, monospace;
  font-size: 0.95rem;
  word-break: break-all;
}

.copy-button {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.85rem;
  border-radius: 0.75rem;
  border: 1px solid rgba(15, 23, 42, 0.12);
  background: #fff;
  color: var(--color-muted);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.copy-button:hover {
  color: var(--color-primary);
  border-color: rgba(0, 123, 255, 0.35);
}

.template-box {
  background: #111827;
  color: rgba(255, 255, 255, 0.9);
  border-radius: 1rem;
  padding: 1.5rem;
  font-family: 'IBM Plex Mono', 'Fira Code', Consolas, monospace;
  font-size: 0.9rem;
  overflow-x: auto;
}

.template-box code {
  color: inherit;
}

.submission-footer {
  margin-top: 2.5rem;
  display: grid;
  gap: 1.25rem;
}

.submission-footer .btn {
  width: max(240px, 40%);
}

/* Email Instructions Section */
.email-instructions {
  margin: 0;
  max-width: none;
  padding: 0;
}

.publication-policy {
  margin: 0;
  max-width: none;
  padding: 0;
}

.accordion-section {
  margin-bottom: 0.75rem;
  scroll-margin-top: 6rem;
}

.accordion-section:last-child {
  margin-bottom: 0;
}

.accordion-heading {
  margin: 0 !important;
}

.accordion-toggle {
  width: 100%;
  border: 1px solid #d6dee8;
  border-radius: 0.75rem;
  background: #f8fafc;
  color: #1a2238;
  font-size: 1.5rem;
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.01em;
  padding: 0.95rem 1rem;
  min-height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.accordion-toggle:hover {
  border-color: #007bff;
  background: rgba(0, 123, 255, 0.03);
}

.accordion-toggle:focus-visible {
  outline: 2px solid #007bff;
  outline-offset: 2px;
}

.accordion-toggle[aria-expanded='true'] {
  background: rgba(0, 123, 255, 0.06);
  border-color: #d6dee8;
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  border-bottom-color: transparent;
  box-shadow: none;
}

.accordion-toggle__icon {
  width: 0.75rem;
  height: 0.75rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.25s ease;
  margin-left: 1rem;
  flex-shrink: 0;
}

.accordion-toggle[aria-expanded='true'] .accordion-toggle__icon {
  transform: rotate(225deg);
}

.accordion-panel {
  margin-top: 0;
  border: 1px solid #d6dee8;
  border-top: none;
  border-radius: 0 0 0.75rem 0.75rem;
  padding: 1.5rem 1rem;
  background: #fff;
}

.accordion-heading + .accordion-panel {
  margin-top: 0;
}

.accepted-author-notice {
  margin: 2.5rem auto 0;
  max-width: none;
  padding: 0;
}

.accepted-author-notice__alert {
  margin: 0;
}

.accepted-author-notice__eyebrow {
  margin: 0 0 0.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-size: 1rem;
}

.accepted-author-notice__jump {
  display: inline-block;
  margin-top: 0.5rem;
  font-weight: 600;
  color: #1a2238;
  text-decoration: underline;
}

#author-instructions {
  margin: 0 0 0.75rem;
  max-width: none;
  padding: 0;
}

#author-instructions .section-heading {
  margin-bottom: 1.25rem;
}

#author-instructions .section-heading h2 {
  margin-bottom: 0.5rem;
}

.author-instructions__subtitle {
  margin: 0;
  color: #475569;
  font-size: 1rem;
  line-height: 1.6;
}

.author-instructions__badges {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.75rem;
}

.author-instructions-intro {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: #334155;
  margin-bottom: 1.25rem;
}

.author-instructions-overview {
  margin-top: 0;
}

.author-instructions-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.25rem 0 2rem;
}

.author-instructions-nav a {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.75rem;
  border-radius: 9999px;
  border: 1px solid #cbd5e1;
  color: #1a2238;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  background: #fff;
}

.author-instructions-nav a:hover {
  border-color: #007bff;
  color: #007bff;
}

.author-instructions-steps {
  display: grid;
  gap: 0;
}

.author-step {
  padding: 0;
  overflow-wrap: anywhere;
}

.author-step:first-child {
  padding-top: 1.5rem;
}

.author-step + .author-step {
  padding-top: 1.5rem;
  border-top: 1px solid #e5e7eb;
}

.author-step h3 {
  margin: 0 0 0.75rem;
  font-size: 1.125rem;
  color: #1a2238;
}

.author-step p {
  margin: 0 0 0.75rem;
  line-height: 1.7;
  color: #334155;
}

.author-step ul {
  margin: 0 0 0.75rem;
  padding-left: 1.25rem;
  color: #334155;
}

.author-step li {
  margin-bottom: 0.35rem;
  line-height: 1.6;
}

.author-step li:last-child {
  margin-bottom: 0;
}

.author-step a[aria-disabled='true'] {
  color: #64748b;
  text-decoration-style: dashed;
}

.author-instructions-emails {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.author-instructions-emails .email-box {
  margin: 0;
}

.email-box--poster .address {
  color: #10b981;
}

.email-box--poster .copy-btn:hover {
  color: #10b981;
}

.instructions-card {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  box-shadow: none;
}

.instructions-intro {
  margin-bottom: 2.5rem;
  font-size: 1.125rem;
  line-height: 1.7;
  color: #374151;
}

.instruction-group {
  margin-bottom: 2.5rem;
}

.instruction-group:last-child {
  margin-bottom: 0;
}

.instruction-group h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #1a2238;
  margin-bottom: 1rem;
}

.subtitle {
  font-size: 0.875rem;
  font-weight: 400;
  color: #6b7280;
}

.help-text {
  margin: 0.75rem 0;
  color: #6b7280;
}

.code-box {
  background: #f3f4f6;
  border: 1px solid #d1d5db;
  border-radius: 0.5rem;
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: 0.75rem 0;
}

.code-box code {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.9375rem;
  color: #1a2238;
  flex: 1;
  word-break: break-all;
}

.copy-btn {
  background: transparent;
  border: 1px solid #d1d5db;
  padding: 0.5rem;
  border-radius: 0.375rem;
  cursor: pointer;
  color: #374151;
  transition: all 0.2s;
  flex-shrink: 0;
}

.copy-btn:hover {
  background: #e5e7eb;
}

.alert {
  display: flex;
  gap: 0.75rem;
  padding: 1rem;
  border-radius: 0.5rem;
  margin: 1rem 0;
}

.alert-info {
  background: rgba(0, 123, 255, 0.08);
  border: 1px solid rgba(0, 123, 255, 0.15);
  color: #007bff;
}

.alert svg {
  flex-shrink: 0;
  margin-top: 0.125rem;
}

.alert p {
  margin: 0;
  line-height: 1.6;
}

.alert strong {
  font-weight: 600;
}

.alert code {
  background: rgba(0, 123, 255, 0.1);
  padding: 0.125rem 0.375rem;
  border-radius: 0.25rem;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.875rem;
}

.group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.btn-outline {
  background: transparent;
  border: 1px solid #d1d5db;
  color: #374151;
}

.btn-outline:hover {
  background: #f3f4f6;
  border-color: #9ca3af;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.template-box {
  background: #1a2238;
  color: #e5e7eb;
  padding: 1.5rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  margin: 0;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.875rem;
  line-height: 1.7;
  white-space: pre-wrap;
  border: 1px solid #374151;
}

.template-box code {
  background: none;
  padding: 0;
  color: inherit;
}

.email-example {
  border: 1px solid #e5e7eb;
  border-radius: 0.5rem;
  overflow: hidden;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.875rem;
}

.email-header {
  background: #f9fafb;
  border-bottom: 1px solid #e5e7eb;
  padding: 1.5rem;
}

.email-field {
  margin-bottom: 1rem;
}

.email-field:last-child {
  margin-bottom: 0;
}

.field-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: #6b7280;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.375rem;
}

.field-value {
  background: #fff;
  padding: 0.625rem;
  border-radius: 0.375rem;
  border: 1px solid #e5e7eb;
  color: #1a2238;
  word-break: break-all;
}

.field-value.attachment {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #dc2626;
}

.field-value.attachment svg {
  flex-shrink: 0;
}

.email-body {
  background: #fff;
  padding: 1.5rem;
}

.body-field {
  margin-bottom: 1.25rem;
}

.body-field:last-child {
  margin-bottom: 0;
}

.body-field strong {
  display: block;
  color: #1a2238;
  font-weight: 600;
  margin-bottom: 0.375rem;
  font-family: 'IBM Plex Mono', monospace;
}

.body-field p {
  margin: 0;
  color: #374151;
  line-height: 1.6;
  font-family: 'IBM Plex Mono', monospace;
}

/* Policy Section */
.policy-section {
  margin: 3rem 0;
}

.policy-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1a2238;
  text-align: center;
  margin-bottom: 0.5rem;
}

.policy-section p {
  text-align: center;
  color: #6b7280;
  line-height: 1.6;
  max-width: 800px;
  margin: 0 auto;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .nested-cards {
    grid-template-columns: 1fr;
  }
  
  .card-body--two-column {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  /* ダミー要素を非表示 */
  .alignment-spacer {
    display: none !important;
  }
}

@media (max-width: 768px) {
  .comparison-table th,
  .comparison-table td {
    padding: 0.75rem;
    font-size: 0.875rem;
  }
  
  .card-header,
  .card-body,
  .nested-cards {
    padding: 1.5rem;
  }
  
  .nested-card-header,
  .nested-card-content {
    padding: 1rem;
  }
  
  .submission-section {
    padding: 3rem 1.5rem;
  }

  .accordion-panel {
    padding: 1.25rem 1rem;
  }

  .author-step:first-child {
    padding-top: 1.25rem;
  }

  .author-step + .author-step {
    padding-top: 1.25rem;
  }

  .author-step h3 {
    font-size: 1.0625rem;
  }

  .author-instructions-emails {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .card-watermark {
    display: none;
  }
  
  .card-header,
  .card-body,
  .nested-cards {
    padding: 1.25rem;
  }
  
  .submission-section {
    padding: 2.5rem 1.5rem;
  }

  .accordion-panel {
    padding: 1rem 0.75rem;
  }

  .author-step:first-child {
    padding-top: 1rem;
  }

  .author-step + .author-step {
    padding-top: 1rem;
  }

  .author-step h3 {
    font-size: 1rem;
  }
}

/* Call for Papers page specific styles */

.submission-hero {
  background: linear-gradient(135deg, var(--color-navy) 0%, #0f1729 100%);
  color: #fff;
  padding: 4rem 1.5rem 5rem;
  text-align: center;
}

.submission-hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin: 0 0 1rem 0;
  color: #fff;
}

.submission-hero p {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 42rem;
  margin: 0 auto;
}

.submission-section {
  padding: 4rem 1.5rem;
}

.submission-section:nth-child(even) {
  background: #fff;
}

@media (max-width: 768px) {
  .submission-hero {
    padding: 3rem 1.5rem 4rem;
  }
  
  .submission-hero h1 {
    font-size: 2rem;
  }
  
  .submission-section {
    padding: 3rem 1.5rem;
  }
}