:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f7;
  --bg-tertiary: #e8e8ed;
  --bg-elevated: #ffffff;
  --text-primary: #1d1d1f;
  --text-secondary: #86868b;
  --text-tertiary: #aeaeb2;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --success: #34c759;
  --success-bg: rgba(52, 199, 89, 0.12);
  --warning: #ff9f0a;
  --warning-bg: rgba(255, 159, 10, 0.12);
  --danger: #ff3b30;
  --danger-bg: rgba(255, 59, 48, 0.12);
  --info: #5856d6;
  --info-bg: rgba(88, 86, 214, 0.12);
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.12);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.04), 0 2px 4px rgba(0, 0, 0, 0.06);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', sans-serif;
  --font-mono: 'SF Mono', SFMono-Regular, ui-monospace, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #000000;
    --bg-secondary: #1c1c1e;
    --bg-tertiary: #2c2c2e;
    --bg-elevated: #1c1c1e;
    --text-primary: #f5f5f7;
    --text-secondary: #a1a1a6;
    --text-tertiary: #6e6e73;
    --accent: #0a84ff;
    --accent-hover: #409cff;
    --success: #30d158;
    --success-bg: rgba(48, 209, 88, 0.16);
    --warning: #ffd60a;
    --warning-bg: rgba(255, 214, 10, 0.16);
    --danger: #ff453a;
    --danger-bg: rgba(255, 69, 58, 0.16);
    --info: #5e5ce6;
    --info-bg: rgba(94, 92, 230, 0.16);
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.12);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-sans); background: var(--bg-secondary); color: var(--text-primary); line-height: 1.5; min-height: 100vh; }
.container { max-width: 980px; margin: 0 auto; padding: 3rem 1.5rem; }

header { text-align: center; margin-bottom: 2.5rem; }
.logo { display: inline-flex; align-items: center; justify-content: center; width: 72px; height: 72px; background: linear-gradient(135deg, var(--accent), #5856d6); border-radius: var(--radius-xl); margin-bottom: 1.25rem; box-shadow: var(--shadow-md); }
.logo svg { width: 40px; height: 40px; fill: none; stroke: white; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
h1 { font-size: 2.75rem; font-weight: 700; letter-spacing: -0.03em; margin-bottom: 0.5rem; }
.subtitle { color: var(--text-secondary); font-size: 1.25rem; }

.tabs { display: flex; gap: 0.25rem; background: var(--bg-tertiary); padding: 0.25rem; border-radius: var(--radius-md); margin-bottom: 1.5rem; overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab { flex: 1; min-width: max-content; padding: 0.625rem 1rem; border: none; background: transparent; color: var(--text-secondary); font-family: inherit; font-size: 0.875rem; font-weight: 500; border-radius: var(--radius-sm); cursor: pointer; transition: var(--transition-fast); white-space: nowrap; }
.tab:hover { color: var(--text-primary); }
.tab.active { background: var(--bg-elevated); color: var(--text-primary); box-shadow: var(--shadow-sm); }
.tab-content { display: none; animation: fadeIn 0.3s ease; }
.tab-content.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

.card { background: var(--bg-elevated); border-radius: var(--radius-lg); padding: 1.5rem; margin-bottom: 1rem; border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.card-header { margin-bottom: 1.25rem; }
.card-title { font-size: 1.25rem; font-weight: 600; margin-bottom: 0.25rem; }
.card-description { color: var(--text-secondary); font-size: 0.875rem; }

.hero { text-align: center; padding: 2rem 0 3rem; }
.hero h2 { font-size: 2rem; font-weight: 700; margin-bottom: 1rem; }
.hero p { font-size: 1.125rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto 2rem; }
.hero-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; margin-top: 2rem; }
.feature { background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.5rem; transition: var(--transition-fast); }
.feature:hover { border-color: var(--border-strong); box-shadow: var(--shadow-md); }
.feature-icon { width: 48px; height: 48px; background: var(--info-bg); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; margin-bottom: 1rem; }
.feature-icon svg { width: 24px; height: 24px; color: var(--info); }
.feature h3 { font-size: 1rem; font-weight: 600; margin-bottom: 0.5rem; }
.feature p { font-size: 0.875rem; color: var(--text-secondary); }

.steps { display: grid; gap: 1rem; margin-top: 1.5rem; }
.step { display: flex; gap: 1rem; align-items: flex-start; background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 1.25rem; }
.step-number { width: 32px; height: 32px; background: var(--accent); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: 0.875rem; flex-shrink: 0; }
.step-content h4 { font-size: 0.9375rem; font-weight: 600; margin-bottom: 0.25rem; }
.step-content p { font-size: 0.875rem; color: var(--text-secondary); }

.section-header { margin-bottom: 1.5rem; }
.section-header h2 { font-size: 1.5rem; font-weight: 600; margin-bottom: 0.5rem; }
.section-header p { color: var(--text-secondary); font-size: 0.9375rem; }

.faq-list { display: flex; flex-direction: column; gap: 0.75rem; }
.faq-item { background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; }
.faq-question { width: 100%; padding: 1rem 1.25rem; background: none; border: none; text-align: left; font-family: inherit; font-size: 0.9375rem; font-weight: 600; color: var(--text-primary); cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 1rem; transition: var(--transition-fast); }
.faq-question:hover { background: var(--bg-secondary); }
.faq-question svg { width: 20px; height: 20px; color: var(--text-tertiary); transition: transform var(--transition-fast); flex-shrink: 0; }
.faq-item.open .faq-question svg { transform: rotate(180deg); }
.faq-answer { display: none; padding: 0 1.25rem 1.25rem; font-size: 0.875rem; color: var(--text-secondary); line-height: 1.6; }
.faq-item.open .faq-answer { display: block; }
.faq-answer code { background: var(--bg-tertiary); padding: 0.125rem 0.375rem; border-radius: 4px; font-family: var(--font-mono); font-size: 0.8125rem; }

.callout { background: var(--warning-bg); border: 1px solid rgba(255, 159, 10, 0.2); border-radius: var(--radius-md); padding: 1rem 1.25rem; margin-bottom: 1.25rem; }
.callout.callout-info { background: var(--info-bg); border-color: rgba(88, 86, 214, 0.2); }
.callout-title { font-size: 0.875rem; font-weight: 600; color: var(--warning); margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.5rem; }
.callout.callout-info .callout-title { color: var(--info); }
.callout ul { padding-left: 1.25rem; font-size: 0.875rem; color: var(--text-secondary); }
.callout li { margin-bottom: 0.375rem; }
.callout code { background: var(--bg-tertiary); padding: 0.125rem 0.375rem; border-radius: 4px; font-family: var(--font-mono); font-size: 0.75rem; }
.callout pre { background: var(--bg-primary); border: 1px solid var(--border); color: var(--text-primary); padding: 0.875rem 1rem; border-radius: var(--radius-sm); overflow-x: auto; margin-top: 0.75rem; font-family: var(--font-mono); font-size: 0.75rem; }
@media (prefers-color-scheme: dark) { .callout pre { background: var(--bg-tertiary); } }

.upload-zone { border: 2px dashed var(--border-strong); border-radius: var(--radius-md); padding: 2.5rem 1.5rem; text-align: center; cursor: pointer; transition: var(--transition-fast); background: var(--bg-secondary); }
.upload-zone:hover, .upload-zone.dragover { border-color: var(--accent); background: var(--info-bg); }
.upload-zone input { display: none; }
.upload-icon { width: 48px; height: 48px; margin: 0 auto 1rem; color: var(--text-tertiary); }
.upload-zone:hover .upload-icon { color: var(--accent); }
.upload-title { font-size: 1rem; font-weight: 500; margin-bottom: 0.25rem; }
.upload-hint { font-size: 0.8125rem; color: var(--text-secondary); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.75rem 1.5rem; border-radius: var(--radius-sm); font-family: inherit; font-size: 0.9375rem; font-weight: 500; cursor: pointer; border: none; transition: var(--transition-fast); text-decoration: none; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn-secondary { background: var(--bg-tertiary); color: var(--text-primary); }
.btn-secondary:hover:not(:disabled) { background: var(--border-strong); }
.btn-success { background: var(--success); color: white; }
.btn-group { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.message { padding: 1rem 1.25rem; border-radius: var(--radius-md); margin-bottom: 1rem; font-size: 0.9375rem; display: flex; align-items: flex-start; gap: 0.75rem; }
.message-success { background: var(--success-bg); color: var(--success); border: 1px solid rgba(52, 199, 89, 0.2); }
.message-error { background: var(--danger-bg); color: var(--danger); border: 1px solid rgba(255, 59, 48, 0.2); }

.search-box { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.search-input { flex: 1; padding: 0.75rem 1rem; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--bg-secondary); color: var(--text-primary); font-family: inherit; font-size: 0.9375rem; }
.search-input:focus { outline: none; border-color: var(--accent); }
.search-input::placeholder { color: var(--text-tertiary); }

.cert-list { display: flex; flex-direction: column; gap: 0.75rem; }
.cert-item { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 1.25rem; transition: var(--transition-fast); }
.cert-item:hover { border-color: var(--border-strong); box-shadow: var(--shadow-sm); }
.cert-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: 0.75rem; flex-wrap: wrap; }
.cert-name { font-size: 1rem; font-weight: 600; word-break: break-word; }
.cert-subject { font-size: 0.75rem; color: var(--text-tertiary); margin-top: 0.125rem; word-break: break-all; }
.cert-meta { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 0.5rem; font-size: 0.8125rem; color: var(--text-secondary); margin-bottom: 0.75rem; }
.cert-meta-item { display: flex; align-items: center; gap: 0.375rem; }
.cert-constraints { padding-top: 0.75rem; border-top: 1px solid var(--border); }
.cert-constraints-label { font-size: 0.75rem; font-weight: 500; color: var(--text-secondary); margin-bottom: 0.5rem; }
.constraint-tags { display: flex; flex-wrap: wrap; gap: 0.375rem; }
.constraint-tag { display: inline-flex; padding: 0.25rem 0.625rem; background: var(--info-bg); color: var(--info); border-radius: 9999px; font-size: 0.6875rem; font-weight: 500; }
.fingerprint { font-family: var(--font-mono); font-size: 0.6875rem; background: var(--bg-tertiary); padding: 0.625rem 0.75rem; border-radius: var(--radius-sm); word-break: break-all; margin-top: 0.75rem; color: var(--text-secondary); }

.status-badge { display: inline-flex; padding: 0.25rem 0.75rem; border-radius: 9999px; font-size: 0.6875rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.025em; white-space: nowrap; }
.status-active { background: var(--success-bg); color: var(--success); }
.status-probationary { background: var(--info-bg); color: var(--info); }
.status-revoked { background: var(--danger-bg); color: var(--danger); }

.pagination { display: flex; align-items: center; justify-content: center; gap: 0.5rem; margin-top: 1.5rem; flex-wrap: wrap; }
.pagination-btn { padding: 0.5rem 1rem; border: 1px solid var(--border); background: var(--bg-elevated); color: var(--text-primary); font-family: inherit; font-size: 0.875rem; border-radius: var(--radius-sm); cursor: pointer; transition: var(--transition-fast); }
.pagination-btn:hover:not(:disabled) { border-color: var(--accent); }
.pagination-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.pagination-btn.active { background: var(--accent); color: white; border-color: var(--accent); }
.pagination-info { font-size: 0.875rem; color: var(--text-secondary); }

.table-wrapper { overflow-x: auto; border-radius: var(--radius-md); border: 1px solid var(--border); }
.audit-table { width: 100%; min-width: 600px; border-collapse: collapse; font-size: 0.8125rem; }
.audit-table th, .audit-table td { padding: 0.75rem 1rem; text-align: left; border-bottom: 1px solid var(--border); }
.audit-table th { background: var(--bg-tertiary); font-weight: 600; color: var(--text-secondary); font-size: 0.75rem; text-transform: uppercase; }
.audit-table tr:last-child td { border-bottom: none; }
.audit-table tr:hover td { background: var(--bg-secondary); }

.download-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.download-card { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 1.25rem; text-align: center; transition: var(--transition-fast); text-decoration: none; color: inherit; }
.download-card:hover { border-color: var(--accent); box-shadow: var(--shadow-md); }
.download-card.recommended { border-color: var(--success); border-width: 2px; }
.download-card-icon { width: 48px; height: 48px; margin: 0 auto 0.75rem; background: var(--info-bg); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; }
.download-card-icon svg { width: 24px; height: 24px; color: var(--info); }
.download-card.recommended .download-card-icon { background: var(--success-bg); }
.download-card.recommended .download-card-icon svg { color: var(--success); }
.download-card h4 { font-size: 0.9375rem; font-weight: 600; margin-bottom: 0.25rem; }
.download-card p { font-size: 0.75rem; color: var(--text-secondary); }
.download-card .badge { display: inline-block; padding: 0.125rem 0.5rem; background: var(--success); color: white; border-radius: 9999px; font-size: 0.625rem; font-weight: 600; text-transform: uppercase; margin-bottom: 0.5rem; }

.platform-tabs { display: flex; gap: 0.5rem; margin-bottom: 1rem; flex-wrap: wrap; }
.platform-tab { padding: 0.5rem 1rem; border: 1px solid var(--border); background: var(--bg-secondary); color: var(--text-secondary); font-family: inherit; font-size: 0.8125rem; font-weight: 500; border-radius: var(--radius-sm); cursor: pointer; transition: var(--transition-fast); display: flex; align-items: center; gap: 0.375rem; }
.platform-tab:hover { border-color: var(--border-strong); color: var(--text-primary); }
.platform-tab.active { background: var(--accent); border-color: var(--accent); color: white; }
.platform-tab svg { width: 16px; height: 16px; }
.platform-content { display: none; }
.platform-content.active { display: block; }

.export-actions { display: flex; gap: 0.75rem; margin-top: 1rem; flex-wrap: wrap; }

footer { text-align: center; margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--border); color: var(--text-secondary); font-size: 0.8125rem; }
footer p { margin-bottom: 0.375rem; }
footer a { color: var(--accent); text-decoration: none; font-weight: 500; }
footer a:hover { text-decoration: underline; }
.footer-link { display: inline-flex; align-items: center; gap: 0.375rem; margin-top: 0.75rem; }

@media (max-width: 768px) {
  .container { padding: 2rem 1rem; }
  h1 { font-size: 2rem; }
  .hero h2 { font-size: 1.5rem; }
  .btn { width: 100%; }
  .btn-group, .hero-buttons { flex-direction: column; }
  .features, .download-grid { grid-template-columns: 1fr; }
  .search-box { flex-direction: column; }
}

.empty-state { text-align: center; padding: 3rem 1.5rem; color: var(--text-secondary); }
.empty-state-icon { width: 48px; height: 48px; margin: 0 auto 1rem; color: var(--text-tertiary); }
.loading { display: flex; align-items: center; justify-content: center; padding: 2rem; color: var(--text-secondary); }
.spinner { width: 20px; height: 20px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; margin-right: 0.75rem; }
@keyframes spin { to { transform: rotate(360deg); } }