/* === 1. CSS Custom Properties === */
:root {
  --color-bg: #ffffff;
  --color-surface: #f1f5f9;
  --color-surface-accent: #eff6ff;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-accent: #2563eb;
  --color-accent-dark: #1d4ed8;
  --color-accent-light: #dbeafe;
  --color-border: #e2e8f0;
  --color-code-bg: #0f172a;
  --color-code-text: #e2e8f0;
  --color-hash-bg: #f8fafc;
  --color-hash-border: #cbd5e1;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "Source Code Pro",
    Menlo, Consolas, "Courier New", monospace;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 4px 16px rgba(37, 99, 235, 0.12);

  --transition: 200ms ease;
  --max-width: 860px;
  --spacing-section: 4rem;
}

/* === 2. Reset & Base === */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  line-height: 1.25;
  font-weight: 700;
  color: var(--color-text);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.125rem; }

p { color: var(--color-text); }

ul, ol { padding-left: 1.25rem; }

/* === 3. Layout & Container === */
.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

section {
  padding-block: var(--spacing-section);
}

section + section {
  border-top: 1px solid var(--color-border);
}

.section-label {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.section-title {
  margin-bottom: 0.5rem;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  max-width: 56ch;
}

/* === 4. Header === */
.header-accent-bar {
  height: 3px;
  background: var(--color-accent);
}

header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.875rem;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-accent);
  letter-spacing: -0.03em;
  line-height: 1;
}

.brand-tagline {
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 2px;
}

nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

nav a:hover {
  color: var(--color-accent);
  background: var(--color-accent-light);
}

/* === 5. Warning Section === */
#warning {
  padding-top: 3rem;
}

.warning-banner {
  background: var(--color-surface-accent);
  border: 1px solid #bfdbfe;
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 1.75rem 2rem;
}

.warning-icon {
  width: 2.5rem;
  height: 2.5rem;
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  flex-shrink: 0;
}

.warning-icon::after {
  content: "!";
  color: #ffffff;
  font-size: 1.25rem;
  font-weight: 800;
  font-family: var(--font-sans);
  line-height: 1;
}

.warning-banner h2 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.warning-banner p {
  color: #1e40af;
  font-size: 0.9375rem;
  margin-bottom: 1rem;
  max-width: 65ch;
}

.risk-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.risk-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  font-size: 0.9375rem;
  color: #1e40af;
}

.risk-list li::before {
  content: "→";
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 0.05em;
}

/* === 6. How-To Section === */
.instruction-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  margin-bottom: 1.5rem;
}

.instruction-card h3 {
  font-size: 0.9375rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.os-badge {
  display: inline-block;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--color-surface);
  color: var(--color-text-muted);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
}

.instruction-card ol {
  counter-reset: step-counter;
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.instruction-card ol li {
  counter-increment: step-counter;
  padding-left: 2.25rem;
  position: relative;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.instruction-card ol li::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 0.1em;
  width: 1.375rem;
  height: 1.375rem;
  background: var(--color-accent);
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.625rem;
  font-weight: 700;
  font-family: var(--font-sans);
}

.instruction-card pre {
  background: var(--color-code-bg);
  color: var(--color-code-text);
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  overflow-x: auto;
  margin-top: 0.375rem;
  line-height: 1.5;
}

.verify-tip {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.verify-tip::before {
  content: "✓";
  color: #16a34a;
  font-weight: 800;
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 0.05em;
}

/* === 7. Search Widget === */
.search-widget {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.search-label {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.search-description {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.search-row {
  display: flex;
  gap: 0.75rem;
}

.search-input {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--color-hash-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

.search-btn {
  padding: 0.625rem 1.375rem;
  background: var(--color-accent);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.875rem;
  font-family: var(--font-sans);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition);
  white-space: nowrap;
}

.search-btn:hover {
  background: var(--color-accent-dark);
}

.search-btn:active {
  background: #1e40af;
}

.search-result {
  margin-top: 0.875rem;
  font-size: 0.875rem;
  font-weight: 500;
  min-height: 1.375rem;
  font-family: var(--font-sans);
}

.search-result--match   { color: #16a34a; }
.search-result--nomatch { color: #dc2626; }
.search-result--error   { color: #d97706; }

/* === 8. Scripts Section === */
.scripts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.script-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition), border-color var(--transition);
}

.script-card:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: #bfdbfe;
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.card-title-group {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex-wrap: wrap;
}

.card-badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: 0.2rem 0.625rem;
  border-radius: 999px;
  border: 1px solid #bfdbfe;
  flex-shrink: 0;
}

.card-name {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.card-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.2rem;
  flex-shrink: 0;
}

.card-version {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  font-family: var(--font-mono);
  background: var(--color-surface-accent);
  padding: 0.1rem 0.5rem;
  border-radius: var(--radius-sm);
}

.card-date {
  font-size: 0.6875rem;
  color: var(--color-text-muted);
}

.card-description {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.hash-block {
  background: var(--color-hash-bg);
  border: 1px solid var(--color-hash-border);
  border-radius: var(--radius-sm);
  padding: 0.875rem 1rem;
}

.hash-label {
  display: block;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: 0.375rem;
}

.hash-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text);
  word-break: break-all;
  line-height: 1.6;
  user-select: all;
  -webkit-user-select: all;
  cursor: text;
}

.hash-hint {
  display: block;
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

/* === 9. Footer === */
footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-block: 2rem;
  margin-top: 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 0.25rem;
}

.footer-updated {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.footer-right {
  text-align: right;
}

.footer-contact {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.footer-note {
  width: 100%;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  margin-top: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-note::before {
  content: "🔒";
  font-size: 0.875rem;
}

/* === 10. Responsive === */
@media (max-width: 640px) {
  :root {
    --spacing-section: 2.5rem;
  }

  h2 { font-size: 1.25rem; }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  nav {
    flex-wrap: wrap;
  }

  .card-header {
    flex-direction: column;
    gap: 0.5rem;
  }

  .card-meta {
    flex-direction: row;
    align-items: center;
  }

  .footer-inner {
    flex-direction: column;
  }

  .footer-right {
    text-align: left;
  }

  .hash-value {
    font-size: 0.75rem;
  }

  .warning-banner {
    padding: 1.25rem;
  }

  .search-row {
    flex-direction: column;
  }

  .search-btn {
    width: 100%;
  }
}