/* ==========================================================================
   Password Generator — shared stylesheet
   Design system: dark navy header, green accent, red→green strength gradient
   ========================================================================== */

:root {
  --bg: #f4f6fb;
  --card-bg: #ffffff;
  --header-bg: #111827;
  --header-bg-2: #1a2332;
  --text: #1f2937;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --border-strong: #d1d5db;

  --accent: #16a34a;
  --accent-hover: #15803d;
  --accent-soft: #dcfce7;

  --weak: #ef4444;
  --medium: #f59e0b;
  --strong: #84cc16;
  --very-strong: #22c55e;

  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(17, 24, 39, 0.08);
  --shadow-lg: 0 10px 40px rgba(17, 24, 39, 0.12);
  --maxw: 700px;

  --font: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --mono: ui-monospace, "SF Mono", "SFMono-Regular", Menlo, Consolas,
    "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Header / nav ---------- */
.site-header {
  background: linear-gradient(135deg, var(--header-bg) 0%, var(--header-bg-2) 100%);
  color: #fff;
}

.nav {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.9rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.01em;
}

.brand .logo {
  font-size: 1.35rem;
  line-height: 1;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: #d1d5db;
  text-decoration: none;
  font-size: 0.92rem;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: background 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}

.nav-links a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.nav-links a.active {
  color: #fff;
  background: rgba(34, 197, 94, 0.22);
}

/* ---------- Layout ---------- */
main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.page-title {
  text-align: center;
  margin: 0.5rem 0 0.25rem;
  font-size: 2rem;
  letter-spacing: -0.02em;
}

.page-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin: 0 0 1.75rem;
  font-size: 1.02rem;
}

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

/* ---------- Password / result display ---------- */
.result-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: #f9fafb;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.5rem 0.5rem 0.9rem;
}

.result-value {
  flex: 1;
  font-family: var(--mono);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  word-break: break-all;
  color: var(--text);
  min-height: 1.6em;
  user-select: all;
}

.result-value.multi {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 1.5rem;
  letter-spacing: 0.15em;
}

.icon-btn {
  flex-shrink: 0;
  border: 1px solid var(--border-strong);
  background: #fff;
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.7rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.icon-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.icon-btn.copied {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent-hover);
}

/* ---------- Strength meter ---------- */
.strength {
  margin-top: 0.9rem;
}

.strength-bar {
  height: 8px;
  border-radius: 999px;
  background: var(--border);
  overflow: hidden;
}

.strength-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  transition: width 0.35s ease, background 0.35s ease;
}

.strength-label {
  margin-top: 0.4rem;
  font-size: 0.88rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
}

.strength-label .value {
  color: var(--text);
}

/* ---------- Options panel ---------- */
.options {
  margin-top: 1.5rem;
}

.field {
  margin-bottom: 1.1rem;
}

.field-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.field label.field-label {
  font-weight: 600;
  font-size: 0.95rem;
}

.length-value {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
  min-width: 2.5ch;
  text-align: right;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  margin-top: 0.5rem;
  cursor: pointer;
}

input[type="number"],
input[type="text"],
select,
textarea {
  font-family: inherit;
  font-size: 1rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
  width: 100%;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

.checks {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem 1rem;
}

.check {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.95rem;
  cursor: pointer;
  padding: 0.35rem 0;
}

.check input[type="checkbox"] {
  width: 1.15rem;
  height: 1.15rem;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.8rem 1.4rem;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  width: 100%;
  font-size: 1.05rem;
  padding: 0.9rem 1.4rem;
  margin-top: 0.5rem;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  font-size: 0.9rem;
  padding: 0.5rem 0.9rem;
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

/* ---------- Advanced options toggle ---------- */
.advanced {
  margin-top: 1rem;
  border-top: 1px dashed var(--border);
  padding-top: 1rem;
}

.advanced-toggle {
  background: none;
  border: none;
  color: var(--accent);
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.advanced-toggle .chevron {
  transition: transform 0.2s ease;
}

.advanced-toggle[aria-expanded="true"] .chevron {
  transform: rotate(90deg);
}

.advanced-body {
  margin-top: 0.9rem;
  display: none;
  flex-direction: column;
  gap: 0.5rem;
}

.advanced-body.open {
  display: flex;
}

.toggle-row {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.93rem;
  cursor: pointer;
}

.toggle-row input[type="checkbox"] {
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--accent);
  cursor: pointer;
}

/* ---------- Checker analysis ---------- */
.analysis {
  margin-top: 1.25rem;
  display: grid;
  gap: 0.5rem;
}

.analysis-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  background: #f9fafb;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
}

.analysis-row .yes {
  color: var(--accent);
  font-weight: 700;
}

.analysis-row .no {
  color: var(--weak);
  font-weight: 700;
}

.crack-time {
  margin-top: 0.75rem;
  text-align: center;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.crack-time strong {
  color: var(--text);
  font-size: 1.05rem;
}

/* ---------- Content / SEO sections ---------- */
.content {
  margin-top: 2.5rem;
}

.content h2 {
  font-size: 1.4rem;
  margin: 1.75rem 0 0.6rem;
  letter-spacing: -0.01em;
}

.content h3 {
  font-size: 1.1rem;
  margin: 1.25rem 0 0.4rem;
}

.content p,
.content li {
  color: #374151;
}

.content a {
  color: var(--accent);
}

/* ---------- FAQ ---------- */
.faq {
  margin-top: 1rem;
}

.faq details {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 0.6rem;
  background: var(--card-bg);
  overflow: hidden;
}

.faq summary {
  cursor: pointer;
  padding: 0.9rem 1rem;
  font-weight: 600;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

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

.faq summary::after {
  content: "+";
  color: var(--accent);
  font-size: 1.3rem;
  font-weight: 400;
  line-height: 1;
  transition: transform 0.2s ease;
}

.faq details[open] summary::after {
  transform: rotate(45deg);
}

.faq details p {
  padding: 0 1rem 1rem;
  margin: 0;
  color: #374151;
}

/* ---------- Note / callout ---------- */
.note {
  margin-top: 1rem;
  padding: 0.7rem 0.9rem;
  background: var(--accent-soft);
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: #166534;
}

/* ---------- Static content pages ---------- */
.prose {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
}

.prose h1 {
  margin-top: 0;
  font-size: 1.8rem;
}

.prose h2 {
  font-size: 1.25rem;
  margin-top: 1.75rem;
}

.prose p,
.prose li {
  color: #374151;
}

.prose .updated {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: -0.5rem;
}

/* ---------- Tool cards grid (footer of tools) ---------- */
.tool-grid {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
}

.tool-grid a {
  display: block;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s ease, transform 0.05s ease;
}

.tool-grid a:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.tool-grid strong {
  display: block;
  color: var(--text);
}

.tool-grid span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---------- Contact form ---------- */
.form-field {
  margin-bottom: 1rem;
}

.form-field label {
  display: block;
  font-weight: 600;
  font-size: 0.92rem;
  margin-bottom: 0.35rem;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--header-bg);
  color: #9ca3af;
  margin-top: 2rem;
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
}

.footer-cols {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 3rem;
  margin-bottom: 1.5rem;
}

.footer-col h4 {
  color: #e5e7eb;
  font-size: 0.9rem;
  margin: 0 0 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.3rem;
}

.footer-col a {
  color: #9ca3af;
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.25rem;
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
}

.breadcrumb {
  font-size: 0.85rem;
  color: #9ca3af;
}

.breadcrumb a {
  color: #d1d5db;
  text-decoration: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 560px) {
  .checks {
    grid-template-columns: 1fr;
  }
  .page-title {
    font-size: 1.65rem;
  }
  .result-value {
    font-size: 1.15rem;
  }
  .nav {
    justify-content: center;
  }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    scroll-behavior: auto !important;
  }
}