/* style.css – modern, responsive, dark mode */
:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0b1b2b;
  --text-muted: #475569;
  --border: #e2e8f0;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --success-bg: #f0fdf4;
  --success-border: #22c55e;
  --success-text: #166534;
  --warning-bg: #fffbeb;
  --warning-border: #f59e0b;
  --warning-text: #92400e;
  --error: #dc2626;
  --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
  --radius: 16px;
  --radius-sm: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120;
    --surface: #1e293b;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #334155;
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --success-bg: #052e16;
    --success-border: #22c55e;
    --success-text: #bbf7d0;
    --warning-bg: #3b2e0b;
    --warning-border: #f59e0b;
    --warning-text: #fde68a;
    --error: #f87171;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
  }
}

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

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Header */
.site-header {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.badge {
  font-size: 0.75rem;
  background: var(--primary);
  color: white;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-weight: 500;
  letter-spacing: 0.01em;
}

/* Hero */
.hero {
  padding: 3rem 0 2rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 6vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  max-width: 640px;
  margin: 0 auto 2.5rem;
  color: var(--text-muted);
  font-size: 1.125rem;
}

/* Tool card */
.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  max-width: 720px;
  margin: 0 auto;
  text-align: left;
  transition: background 0.2s, border-color 0.2s;
}

.input-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.input-group input {
  flex: 1 1 240px;
  padding: 0.9rem 1.2rem;
  font-size: 1rem;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
}

.input-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.input-group input:invalid:not(:placeholder-shown) {
  border-color: var(--error);
}

.btn-primary,
.btn-secondary {
  padding: 0.9rem 1.6rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s, transform 0.1s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--border);
}

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

.error-msg {
  color: var(--error);
  font-size: 0.875rem;
  margin-top: 0.5rem;
  min-height: 1.4em;
}

/* Loading */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1.5rem;
  color: var(--text-muted);
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.hidden {
  display: none !important;
}

/* Results */
.results {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.result-card {
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
  border-left: 6px solid transparent;
  background: var(--bg);
  border: 1px solid var(--border);
  border-left-width: 6px;
  text-align: left;
  word-break: break-word;
}

.result-card.success {
  background: var(--success-bg);
  border-color: var(--success-border);
  border-left-color: var(--success-border);
  color: var(--success-text);
}

.result-card.warning {
  background: var(--warning-bg);
  border-color: var(--warning-border);
  border-left-color: var(--warning-border);
  color: var(--warning-text);
}

.result-card .breach-title {
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.result-card .breach-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  font-size: 0.9rem;
  margin: 0.4rem 0;
}

.result-card .breach-desc {
  font-size: 0.95rem;
  margin-top: 0.5rem;
  opacity: 0.9;
}

.result-card .badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.result-card .data-badge {
  background: rgba(0, 0, 0, 0.06);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
}

@media (prefers-color-scheme: dark) {
  .result-card .data-badge {
    background: rgba(255, 255, 255, 0.12);
  }
}

.actions {
  margin-top: 1.5rem;
  display: flex;
  justify-content: flex-end;
}

/* Content sections */
.content-section {
  padding: 3rem 0 4rem;
}

.content-section h2 {
  font-size: 1.6rem;
  margin: 2rem 0 0.75rem;
  letter-spacing: -0.01em;
}

.content-section h2:first-of-type {
  margin-top: 0;
}

.content-section p,
.content-section li {
  color: var(--text-muted);
  max-width: 75ch;
}

.content-section ul,
.content-section ol {
  padding-left: 1.5rem;
  margin: 0.5rem 0 1.5rem;
}

.content-section li {
  margin-bottom: 0.3rem;
}

.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
  transition: background 0.15s;
}

.faq summary {
  font-weight: 600;
  cursor: pointer;
  color: var(--text);
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::before {
  content: "▸ ";
  color: var(--primary);
  font-weight: 700;
  display: inline-block;
  transition: transform 0.2s;
}

.faq details[open] summary::before {
  transform: rotate(90deg);
}

.faq p {
  margin-top: 0.75rem;
  color: var(--text-muted);
}

/* Footer */
.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
  background: var(--surface);
}

/* Responsive */
@media (max-width: 600px) {
  .tool-card {
    padding: 1.5rem;
  }
  .input-group {
    flex-direction: column;
  }
  .btn-primary,
  .btn-secondary {
    width: 100%;
    justify-content: center;
  }
  .actions {
    justify-content: stretch;
  }
  .hero {
    padding: 2rem 0 1rem;
  }
}