/* ============================================================
   Avezom Tools — Design System
   style.css
   ============================================================ */

/* ── 1. Custom Properties ── */
:root {
  /* Colors — Light */
  --color-bg: #f8f9fb;
  --color-surface: #ffffff;
  --color-surface-2: #f1f5f9;
  --color-border: #e2e8f0;
  --color-border-focus: #3b6ef6;
  --color-text: #111827;
  --color-text-muted: #64748b;
  --color-text-subtle: #94a3b8;
  --color-accent: #3b6ef6;
  --color-accent-hover: #2d5ed4;
  --color-accent-light: #eff3ff;
  --color-success: #16a34a;
  --color-success-bg: #f0fdf4;
  --color-warning: #ca8a04;
  --color-warning-bg: #fefce8;
  --color-error: #dc2626;
  --color-error-bg: #fef2f2;
  --color-info-bg: #eff6ff;
  --color-info: #2563eb;

  /* Strength colors */
  --color-weak: #ef4444;
  --color-medium: #f97316;
  --color-strong: #eab308;
  --color-very-strong: #22c55e;

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

  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;

  /* Layout */
  --content-width: 1200px;
  --tool-width: 800px;
  --header-height: 60px;
}

/* Dark Mode */
[data-theme="dark"] {
  --color-bg: #0f1117;
  --color-surface: #1a1d27;
  --color-surface-2: #242838;
  --color-border: #2d3148;
  --color-border-focus: #5b8afe;
  --color-text: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-text-subtle: #64748b;
  --color-accent: #5b8afe;
  --color-accent-hover: #7ba3ff;
  --color-accent-light: #1e2a45;
  --color-success: #4ade80;
  --color-success-bg: #052e16;
  --color-warning: #fbbf24;
  --color-warning-bg: #1c1400;
  --color-error: #f87171;
  --color-error-bg: #1c0505;
  --color-info-bg: #0c1a38;
  --color-info: #93c5fd;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5), 0 4px 6px -4px rgb(0 0 0 / 0.4);
}

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

html {
  color-scheme: light;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

[data-theme="dark"] html,
html[data-theme="dark"] {
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-base),
    color var(--transition-base);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

img,
svg {
  display: block;
  max-width: 100%;
}

ul,
ol {
  padding-left: 1.5rem;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.25;
  font-weight: 700;
  color: var(--color-text);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h3 { font-size: 1.125rem; }

p { max-width: 70ch; }

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ── 3. Layout Utilities ── */
.container {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--spacing-6);
}

.tool-container {
  width: 100%;
  max-width: var(--tool-width);
  margin-inline: auto;
  padding-inline: var(--spacing-6);
}

.main-content {
  flex: 1;
  padding-block: var(--spacing-10);
}

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

/* Grid layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr));
  gap: var(--spacing-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
  gap: var(--spacing-6);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr));
  gap: var(--spacing-4);
}

.flex-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.flex-wrap {
  flex-wrap: wrap;
}

.justify-between {
  justify-content: space-between;
}

/* ── 4. Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: var(--spacing-4);
}

.site-logo {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
  line-height: 1;
}

.site-logo:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.logo-sub {
  font-weight: 500;
  color: var(--color-text-muted);
  font-size: 1.125rem;
  letter-spacing: -0.01em;
  transition: color var(--transition-fast);
}

.site-logo:hover .logo-sub {
  color: var(--color-accent);
}

.logo-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
  display: inline-block;
  margin-left: 2px;
  align-self: center;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
}

.nav-link {
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
  background-color: var(--color-surface-2);
  text-decoration: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background-color var(--transition-fast),
    color var(--transition-fast), border-color var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--color-surface-2);
  color: var(--color-text);
  border-color: var(--color-border);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

.icon-sun { display: none; }
.icon-moon { display: block; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

/* Mobile menu */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 36px;
  height: 36px;
  gap: 5px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: transparent;
  cursor: pointer;
}

.hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background-color: var(--color-text-muted);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  padding: var(--spacing-4) var(--spacing-6);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  gap: var(--spacing-2);
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav .nav-link {
  padding: var(--spacing-3) var(--spacing-4);
  font-size: 1rem;
}

/* ── 5. Footer ── */
.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-block: var(--spacing-10);
  margin-top: auto;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--spacing-8);
  align-items: start;
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-top: var(--spacing-2);
  max-width: 30ch;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-3) var(--spacing-6);
  justify-content: flex-end;
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.footer-bottom {
  margin-top: var(--spacing-8);
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-subtle);
  font-size: 0.875rem;
}

/* ── 6. Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  transition: background-color var(--transition-fast),
    color var(--transition-fast), border-color var(--transition-fast),
    box-shadow var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
  user-select: none;
  -webkit-user-select: none;
}

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

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
  text-decoration: none;
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-surface-2);
  border-color: var(--color-border);
  color: var(--color-text);
  text-decoration: none;
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-muted);
  border-color: transparent;
}

.btn-ghost:hover {
  background-color: var(--color-surface-2);
  color: var(--color-text);
  text-decoration: none;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  border-radius: var(--radius-lg);
}

.btn-icon {
  padding: 0.5rem;
  width: 36px;
  height: 36px;
}

.btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.btn-copy {
  position: relative;
}

.btn-copy.copied {
  background-color: var(--color-success-bg);
  border-color: var(--color-success);
  color: var(--color-success);
}

/* ── 7. Cards ── */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.card-hover {
  cursor: pointer;
}

.card-hover:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-focus);
}

/* Tool cards on homepage/all-tools */
.tool-card {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
  text-decoration: none;
  color: inherit;
}

.tool-card:hover {
  text-decoration: none;
}

.tool-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  flex-shrink: 0;
}

.tool-card-icon svg {
  width: 24px;
  height: 24px;
}

.tool-card-content {
  flex: 1;
}

.tool-card-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-1);
}

.tool-card-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.tool-card-footer {
  margin-top: auto;
  padding-top: var(--spacing-4);
  border-top: 1px solid var(--color-border);
}

/* ── 8. Form Elements ── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}

.form-hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.form-error {
  font-size: 0.8rem;
  color: var(--color-error);
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  line-height: 1.5;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgb(59 110 246 / 0.15);
}

.form-input::placeholder {
  color: var(--color-text-subtle);
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b' stroke-width='2'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 16px;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form-number {
  width: 80px;
  text-align: center;
}

/* Checkbox */
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--color-text);
  user-select: none;
  -webkit-user-select: none;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  accent-color: var(--color-accent);
  cursor: pointer;
  flex-shrink: 0;
}

/* Range slider */
.form-range {
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-border);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
}

.form-range::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: var(--color-accent);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.form-range::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.form-range::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: var(--color-accent);
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-sm);
}

.slider-with-input {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

.slider-with-input .form-range {
  flex: 1;
}

/* Radio group */
.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
}

.radio-pill input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.radio-pill label {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-2) var(--spacing-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
  -webkit-user-select: none;
}

.radio-pill label:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background-color: var(--color-accent-light);
}

.radio-pill input[type="radio"]:checked + label {
  border-color: var(--color-accent);
  background-color: var(--color-accent);
  color: #fff;
}

.radio-pill input[type="radio"]:focus-visible + label {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* ── 9. Tool Output ── */
.tool-output-wrapper {
  position: relative;
}

.tool-output {
  width: 100%;
  padding: var(--spacing-4) var(--spacing-5);
  background-color: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
  word-break: break-all;
  min-height: 60px;
  display: flex;
  align-items: center;
  padding-right: 3.5rem;
  line-height: 1.4;
}

.tool-output-actions {
  display: flex;
  gap: var(--spacing-2);
  flex-wrap: wrap;
}

/* Password output specifically */
.password-output-area {
  display: flex;
  gap: var(--spacing-3);
  align-items: stretch;
}

.password-output-area .tool-output {
  flex: 1;
  font-size: 1.2rem;
  padding-right: var(--spacing-5);
  min-height: 64px;
}

/* Results list */
.results-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.result-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-3);
  padding: var(--spacing-3) var(--spacing-4);
  background-color: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
}

.result-item:hover {
  border-color: var(--color-border-focus);
}

.result-item-value {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  word-break: break-all;
  flex: 1;
}

/* Number grid */
.number-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-3);
}

.number-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 64px;
  padding: var(--spacing-3) var(--spacing-4);
  background-color: var(--color-accent-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-accent);
  transition: all var(--transition-fast);
}

.number-badge:hover {
  background-color: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

/* ── 10. Password Strength ── */
.strength-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.strength-bar-track {
  height: 6px;
  border-radius: var(--radius-full);
  background-color: var(--color-border);
  overflow: hidden;
}

.strength-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.3s ease, background-color 0.3s ease;
  width: 0%;
}

.strength-bar-fill[data-level="1"] {
  width: 25%;
  background-color: var(--color-weak);
}

.strength-bar-fill[data-level="2"] {
  width: 50%;
  background-color: var(--color-medium);
}

.strength-bar-fill[data-level="3"] {
  width: 75%;
  background-color: var(--color-strong);
}

.strength-bar-fill[data-level="4"] {
  width: 100%;
  background-color: var(--color-very-strong);
}

.strength-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.strength-text {
  font-size: 0.8rem;
  font-weight: 600;
}

.strength-text[data-level="1"] { color: var(--color-weak); }
.strength-text[data-level="2"] { color: var(--color-medium); }
.strength-text[data-level="3"] { color: var(--color-strong); }
.strength-text[data-level="4"] { color: var(--color-very-strong); }

.strength-entropy {
  font-size: 0.75rem;
  color: var(--color-text-subtle);
}

/* ── 11. Alerts / Notices ── */
.alert {
  padding: var(--spacing-4) var(--spacing-5);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  line-height: 1.6;
  display: flex;
  gap: var(--spacing-3);
  align-items: flex-start;
}

.alert svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 1px;
}

.alert-privacy {
  background-color: var(--color-info-bg);
  border: 1px solid var(--color-border);
  color: var(--color-info);
}

.alert-success {
  background-color: var(--color-success-bg);
  border: 1px solid var(--color-border);
  color: var(--color-success);
}

.alert-error {
  background-color: var(--color-error-bg);
  border: 1px solid var(--color-error);
  color: var(--color-error);
  display: none;
}

.alert-error.visible {
  display: flex;
}

/* ── 12. Breadcrumb ── */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-2);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-6);
}

.breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
}

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

.breadcrumb-sep {
  color: var(--color-text-subtle);
}

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
}

/* ── 13. FAQ ── */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-border-focus);
}

.faq-item summary {
  padding: var(--spacing-4) var(--spacing-6);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-4);
  user-select: none;
  -webkit-user-select: none;
}

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

.faq-chevron {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
}

.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 var(--spacing-6) var(--spacing-5);
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.faq-answer p + p {
  margin-top: var(--spacing-3);
}

/* ── 14. Section Layout ── */
.section {
  padding-block: var(--spacing-10);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-6);
}

.section-divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-block: var(--spacing-10);
}

/* ── 15. Hero ── */
.hero {
  text-align: center;
  padding-block: var(--spacing-16) var(--spacing-10);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-1) var(--spacing-3);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-5);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--spacing-4);
  max-width: 15ch;
  margin-inline: auto;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 50ch;
  margin-inline: auto;
  margin-bottom: var(--spacing-8);
}

/* Search */
.search-wrapper {
  position: relative;
  max-width: 480px;
  margin-inline: auto;
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-subtle);
  pointer-events: none;
  width: 20px;
  height: 20px;
}

.search-input {
  width: 100%;
  padding: 0.875rem 1rem 0.875rem 3rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background-color: var(--color-surface);
  font-size: 0.95rem;
  color: var(--color-text);
  box-shadow: var(--shadow-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgb(59 110 246 / 0.15), var(--shadow-md);
}

.search-input::placeholder {
  color: var(--color-text-subtle);
}

.search-empty {
  display: none;
  text-align: center;
  color: var(--color-text-muted);
  padding: var(--spacing-8);
  font-size: 0.95rem;
}

.search-empty.visible {
  display: block;
}

/* ── 16. Tool Page Layout ── */
.tool-header {
  margin-bottom: var(--spacing-8);
}

.tool-header h1 {
  margin-bottom: var(--spacing-3);
}

.tool-header p {
  color: var(--color-text-muted);
  font-size: 1rem;
}

.tool-panel {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-8);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-8);
}

.tool-settings {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.tool-divider {
  border: none;
  border-top: 1px solid var(--color-border);
}

/* ── 17. Related Tools ── */
.related-tools {
  margin-top: var(--spacing-6);
}

/* ── 18. Features Grid ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr));
  gap: var(--spacing-5);
}

.feature-item {
  display: flex;
  gap: var(--spacing-3);
  align-items: flex-start;
}

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  flex-shrink: 0;
}

.feature-icon svg {
  width: 18px;
  height: 18px;
}

.feature-text h4 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: var(--spacing-1);
}

.feature-text p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  max-width: none;
  line-height: 1.5;
}

/* ── 19. Badge / Tag ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-blue {
  background-color: var(--color-accent-light);
  color: var(--color-accent);
}

.badge-green {
  background-color: var(--color-success-bg);
  color: var(--color-success);
}

/* ── 20. All Tools filter ── */
.filter-bar {
  display: flex;
  gap: var(--spacing-2);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-6);
}

.filter-btn {
  padding: var(--spacing-2) var(--spacing-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background-color: var(--color-surface);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}

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

.filter-btn.active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* ── 21. 404 Page ── */
.page-404 {
  text-align: center;
  padding-block: var(--spacing-16);
}

.page-404-code {
  font-size: clamp(4rem, 15vw, 8rem);
  font-weight: 900;
  color: var(--color-border);
  letter-spacing: -0.05em;
  line-height: 1;
  margin-bottom: var(--spacing-4);
}

.page-404 h1 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-3);
}

.page-404 p {
  color: var(--color-text-muted);
  margin-inline: auto;
  margin-bottom: var(--spacing-8);
}

/* ── 22. Privacy / Terms / Contact ── */
.prose h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: var(--spacing-8);
  margin-bottom: var(--spacing-3);
}

.prose p {
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-4);
}

.prose ul {
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-4);
}

.prose ul li {
  margin-bottom: var(--spacing-2);
}

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

/* ── 23. How-to Steps ── */
.steps {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-5);
}

.step {
  display: flex;
  gap: var(--spacing-4);
  align-items: flex-start;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.step-content h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: var(--spacing-1);
}

.step-content p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  max-width: none;
}

/* ── 24. Responsive ── */
@media (max-width: 768px) {
  .site-nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .container,
  .tool-container {
    padding-inline: var(--spacing-4);
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-links {
    justify-content: flex-start;
  }

  .tool-panel {
    padding: var(--spacing-5);
  }

  .password-output-area {
    flex-direction: column;
  }

  .password-output-area .tool-output {
    font-size: 1rem;
  }

  .hero {
    padding-block: var(--spacing-10) var(--spacing-8);
  }

  .hero h1 {
    font-size: clamp(1.75rem, 6vw, 2.5rem);
  }
}

@media (max-width: 480px) {
  .btn-lg {
    width: 100%;
  }

  .tool-output-actions {
    width: 100%;
  }

  .tool-output-actions .btn {
    flex: 1;
  }

  .number-grid {
    gap: var(--spacing-2);
  }

  .number-badge {
    min-width: 56px;
    font-size: 1rem;
  }

  .faq-item summary {
    padding: var(--spacing-4);
  }

  .faq-answer {
    padding: 0 var(--spacing-4) var(--spacing-4);
  }
}

/* ── 25. Quantity selector ── */
.qty-selector {
  display: flex;
  gap: var(--spacing-2);
  flex-wrap: wrap;
}

/* ── 26. Print ── */
@media print {
  .site-header,
  .site-footer,
  .btn,
  .tool-output-actions {
    display: none !important;
  }
}

/* ── 27. Reduced motion ── */
@property --animation-reduced {
  syntax: "*";
  inherits: false;
  initial-value: none;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* ── 28. Consent Banner ── */
.consent-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-4) 0;
  z-index: 1000;
  transform: translateY(100%);
  opacity: 0;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.consent-banner.visible {
  transform: translateY(0);
  opacity: 1;
}

.consent-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-4);
  flex-wrap: wrap;
}

.consent-text {
  flex: 1;
  min-width: 280px;
}

.consent-text p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--color-text-muted);
}

.consent-text p strong {
  color: var(--color-text);
}

.consent-text a {
  color: var(--color-accent);
  text-decoration: underline;
}

.consent-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  flex-shrink: 0;
}

@media (max-width: 640px) {
  .consent-inner {
    flex-direction: column;
    align-items: stretch;
  }
  .consent-actions {
    justify-content: flex-end;
  }
}

/* ── 29. Legal & Policy Document Layout ── */
.legal-container {
  width: 100%;
  max-width: 1020px;
  margin-inline: auto;
  padding-inline: var(--spacing-6);
}

.legal-header {
  margin-bottom: var(--spacing-8);
  text-align: left;
}

.legal-header h1 {
  font-size: clamp(2rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--spacing-2);
}

.legal-header .meta-date {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: 0.925rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.legal-grid {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--spacing-8);
  align-items: start;
}

/* Table of Contents */
.legal-toc {
  position: sticky;
  top: calc(var(--header-height) + var(--spacing-6));
}

.legal-toc-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-5);
  box-shadow: var(--shadow-sm);
}

.legal-toc-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-3);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.legal-toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
}

.legal-toc-link {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  display: block;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
  line-height: 1.4;
}

.legal-toc-link:hover {
  color: var(--color-accent);
  background-color: var(--color-accent-light);
  text-decoration: none;
}

/* Mobile TOC details */
.legal-toc-mobile {
  display: none;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-3) var(--spacing-4);
  margin-bottom: var(--spacing-6);
}

.legal-toc-mobile summary {
  font-weight: 600;
  font-size: 0.925rem;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.legal-toc-mobile[open] summary {
  margin-bottom: var(--spacing-3);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--spacing-2);
}

/* Document Paper Card */
.legal-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-8) var(--spacing-10);
  box-shadow: var(--shadow-sm);
}

.legal-card p {
  max-width: 100%;
  font-size: 1.025rem;
  line-height: 1.75;
  color: var(--color-text);
  margin-bottom: var(--spacing-5);
}

.legal-card h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text);
  margin-top: var(--spacing-8);
  margin-bottom: var(--spacing-3);
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--color-border);
  scroll-margin-top: calc(var(--header-height) + 24px);
}

.legal-card h2:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.legal-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--spacing-5);
  margin-bottom: var(--spacing-2);
}

.legal-card ul,
.legal-card ol {
  padding-left: 1.5rem;
  margin-bottom: var(--spacing-5);
}

.legal-card li {
  margin-bottom: var(--spacing-2);
  line-height: 1.7;
  color: var(--color-text);
  font-size: 1.025rem;
}

.legal-card code {
  background-color: var(--color-surface-2);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
  font-family: var(--font-mono);
  color: var(--color-accent);
}

.legal-highlight {
  background-color: var(--color-accent-light);
  border-left: 4px solid var(--color-accent);
  padding: var(--spacing-4) var(--spacing-5);
  border-radius: var(--radius-md);
  margin-block: var(--spacing-6);
}

.legal-highlight p {
  margin: 0;
  font-size: 0.975rem;
}

@media (max-width: 860px) {
  .legal-grid {
    grid-template-columns: 1fr;
  }
  .legal-toc {
    display: none;
  }
  .legal-toc-mobile {
    display: block;
  }
  .legal-card {
    padding: var(--spacing-6) var(--spacing-5);
  }
}

@media (max-width: 480px) {
  .legal-container {
    padding-inline: var(--spacing-4);
  }
  .legal-card {
    padding: var(--spacing-5) var(--spacing-4);
  }
  .legal-card p,
  .legal-card li {
    font-size: 0.95rem;
    line-height: 1.65;
  }
}

/* ── 30. Contact Page Two-Column Layout ── */
.contact-container {
  width: 100%;
  max-width: 1020px;
  margin-inline: auto;
  padding-inline: var(--spacing-6);
}

.contact-header {
  text-align: left;
  margin-bottom: var(--spacing-8);
}

.contact-header h1 {
  font-size: clamp(2rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-2);
}

.contact-header p {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 650px;
  line-height: 1.6;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--spacing-8);
  align-items: start;
}

.contact-form-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-8);
  box-shadow: var(--shadow-sm);
}

.contact-form-card h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: var(--spacing-4);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.contact-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-5);
}

.contact-info-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-sm);
}

.contact-info-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--spacing-2);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  color: var(--color-text);
}

.contact-info-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--spacing-3);
}

.contact-info-card p:last-child {
  margin-bottom: 0;
}

.contact-checklist {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.contact-checklist li {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-2);
  line-height: 1.5;
}

.contact-checklist li svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-accent);
}

/* Form validation states */
.form-input.is-invalid,
.form-select.is-invalid,
textarea.form-input.is-invalid {
  border-color: var(--color-error);
  background-color: var(--color-error-bg);
}

.input-error-msg {
  display: none;
  font-size: 0.825rem;
  color: var(--color-error);
  margin-top: var(--spacing-1);
}

.input-error-msg.visible {
  display: block;
}

.form-status {
  display: none;
  padding: var(--spacing-4);
  border-radius: var(--radius-md);
  margin-top: var(--spacing-4);
  font-size: 0.925rem;
  line-height: 1.5;
}

.form-status.success {
  display: block;
  background-color: var(--color-success-bg);
  border: 1px solid var(--color-success);
  color: var(--color-success);
}

.form-status.error {
  display: block;
  background-color: var(--color-error-bg);
  border: 1px solid var(--color-error);
  color: var(--color-error);
}

@media (max-width: 860px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .contact-form-card {
    padding: var(--spacing-6) var(--spacing-5);
  }
}

@media (max-width: 480px) {
  .contact-container {
    padding-inline: var(--spacing-4);
  }
  .contact-form-card {
    padding: var(--spacing-5) var(--spacing-4);
  }
}