/* UK Small Business Toolkit - Design System
   Option C: Modern B2B Product
   Fonts: Outfit (headings) + Inter (body)
   Accent: Amber #d97706 | Background: #f0f4f8
*/


/* ============================================================
   CSS CUSTOM PROPERTIES
   ============================================================ */
:root {
  /* Page backgrounds */
  --bg-page:          #f0f4f8;
  --bg-white:         #ffffff;
  --bg-subtle:        #e8edf3;
  --bg-input:         #f7f9fb;
  --bg-input-focus:   #ffffff;

  /* Text */
  --text-primary:     #0f172a;
  --text-secondary:   #334155;
  --text-muted:       #64748b;
  --text-tertiary:    #94a3b8;
  --text-inverse:     #ffffff;
  --text-on-amber:    #ffffff;

  /* Amber accent */
  --accent:           #d97706;
  --accent-hover:     #b45309;
  --accent-active:    #92400e;
  --accent-light:     #fffbeb;
  --accent-mid:       #f59e0b;
  --accent-muted:     rgba(217, 119, 6, 0.10);
  --accent-border:    rgba(217, 119, 6, 0.30);

  /* Slate (secondary brand colour) */
  --slate:            #1e3a5f;
  --slate-hover:      #162d4a;
  --slate-light:      #e8eef6;
  --slate-muted:      rgba(30, 58, 95, 0.08);

  /* Borders */
  --border:           #d1dbe6;
  --border-strong:    #a3b5c6;
  --border-focus:     #d97706;

  /* Status */
  --success:          #15803d;
  --success-bg:       #f0fdf4;
  --success-border:   #bbf7d0;
  --warning:          #d97706;
  --warning-bg:       #fffbeb;
  --warning-border:   #fde68a;
  --error:            #dc2626;
  --error-bg:         #fef2f2;
  --error-border:     #fecaca;
  --info:             #1e3a5f;
  --info-bg:          #e8eef6;
  --info-border:      #bfcfdf;

  /* Typography */
  --font-head:        'Outfit', system-ui, sans-serif;
  --font-body:        'Inter', system-ui, sans-serif;
  --font-mono:        'JetBrains Mono', 'Fira Code', monospace;

  /* Radius */
  --r-xs:     4px;
  --r-sm:     6px;
  --r-md:     10px;
  --r-lg:     14px;
  --r-xl:     20px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(15,23,42,0.06), 0 1px 2px rgba(15,23,42,0.04);
  --shadow-md:  0 4px 12px rgba(15,23,42,0.08), 0 2px 4px rgba(15,23,42,0.04);
  --shadow-lg:  0 8px 24px rgba(15,23,42,0.10), 0 4px 8px rgba(15,23,42,0.04);
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-page);
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-primary);
  margin: 0 0 0.5em;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.05rem; }

p { margin: 0 0 1em; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

strong { font-weight: 600; }

ul, ol { padding-left: 1.4em; margin: 0 0 1em; }
li { margin-bottom: 0.35em; }

/* ============================================================
   LAYOUT
   ============================================================ */
.site-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.container--narrow {
  max-width: 760px;
}

.container--wide {
  max-width: 1280px;
}

main {
  flex: 1;
  padding: 40px 0 80px;
}

/* ============================================================
   HEADER / NAV
   ============================================================ */
.site-header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 20px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  min-width: 0;
  flex-shrink: 1;
}

.logo-mark {
  width: 36px;
  height: 36px;
  background: var(--accent);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-mark svg {
  width: 20px;
  height: 20px;
  fill: #fff;
}

.logo-text {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.logo-text span {
  display: block;
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--r-sm);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.site-nav a:hover {
  background: var(--bg-subtle);
  color: var(--text-primary);
  text-decoration: none;
}

.site-nav a.active {
  background: var(--accent-muted);
  color: var(--accent);
}

.nav-cta {
  background: var(--accent) !important;
  color: var(--text-on-amber) !important;
  padding: 7px 16px !important;
  border-radius: var(--r-sm) !important;
}

.nav-cta:hover {
  background: var(--accent-hover) !important;
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text-secondary);
}

/* ============================================================
   CONTENT LAYOUT (about, privacy, contact pages)
   ============================================================ */
.content-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 32px;
  align-items: start;
}

.content-main {}

.content-sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

@media (max-width: 900px) {
  .content-layout {
    grid-template-columns: 1fr;
  }
  .content-sidebar {
    display: none;
  }
}

/* ============================================================
   BREADCRUMB
   ============================================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

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

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

.breadcrumb-sep {
  color: var(--border-strong);
  font-size: 0.75rem;
}

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

/* ============================================================
   PAGE HERO (tool pages)
   ============================================================ */
.page-hero {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  padding: 32px 0 28px;
  margin-bottom: 0;
}

.page-hero .container {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.hero-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-muted);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 22px;
}

.hero-text h1 {
  font-size: 1.6rem;
  margin-bottom: 6px;
}

.hero-text p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: 0;
  max-width: 600px;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.hero-badge {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--accent-muted);
  color: var(--accent-hover);
  border: 1px solid var(--accent-border);
}

.hero-badge.slate {
  background: var(--slate-muted);
  color: var(--slate);
  border-color: rgba(30,58,95,0.2);
}

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.card--compact { padding: 16px 20px; }
.card--flush  { padding: 0; overflow: hidden; }

.card-title {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

/* Tool card (homepage grid) */
.tool-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 20px;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.1s;
  box-shadow: var(--shadow-sm);
}

.tool-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  text-decoration: none;
}

.tool-card-icon {
  width: 40px;
  height: 40px;
  background: var(--accent-muted);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.tool-card-title {
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.3;
}

.tool-card-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
}

.tool-card-arrow {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Category section */
.category-section {
  margin-bottom: 48px;
}

.category-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
}

.category-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.category-icon.amber { background: var(--accent-muted); }
.category-icon.slate { background: var(--slate-muted); }
.category-icon.blue  { background: #e8eef6; }
.category-icon.green { background: #f0fdf4; }
.category-icon.purple { background: #f3f0ff; }

.category-label {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.category-count {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: auto;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

/* ============================================================
   TOOL PAGE LAYOUT
   ============================================================ */
.tool-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 28px;
  align-items: start;
  margin-top: 32px;
}

.tool-main { min-width: 0; }

.tool-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 80px;
}

/* ============================================================
   FORM ELEMENTS
   ============================================================ */
.form-group {
  margin-bottom: 18px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

label .hint {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-left: 4px;
}

input[type="text"],
input[type="number"],
input[type="email"],
input[type="date"],
select,
textarea {
  width: 100%;
  padding: 9px 12px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  outline: none;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
  appearance: none;
  -webkit-appearance: none;
}

input[type="number"] {
  font-family: var(--font-mono);
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--border-focus);
  background: var(--bg-input-focus);
  box-shadow: 0 0 0 3px var(--accent-muted);
}

input::placeholder { color: var(--text-tertiary); }

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2364748b' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}

textarea {
  resize: vertical;
  min-height: 80px;
  line-height: 1.5;
}

.input-prefix-wrap,
.input-suffix-wrap {
  position: relative;
}

.input-prefix-wrap input { padding-left: 32px; }
.input-suffix-wrap input { padding-right: 40px; }

.input-prefix,
.input-suffix {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  pointer-events: none;
}

.input-prefix { left: 10px; }
.input-suffix { right: 10px; }

/* Radio + checkbox groups */
.radio-group,
.check-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.radio-opt,
.check-opt {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: all 0.12s;
  user-select: none;
}

.radio-opt input,
.check-opt input {
  width: auto;
  accent-color: var(--accent);
}

.radio-opt:has(input:checked),
.check-opt:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent-hover);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-family: var(--font-head);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  border-radius: var(--r-sm);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
  line-height: 1;
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent);
  color: var(--text-on-amber);
}

.btn--primary:hover {
  background: var(--accent-hover);
  color: var(--text-on-amber);
  text-decoration: none;
}

.btn--secondary {
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn--secondary:hover {
  background: var(--bg-white);
  color: var(--text-primary);
  text-decoration: none;
}

.btn--slate {
  background: var(--slate);
  color: var(--text-inverse);
}

.btn--slate:hover {
  background: var(--slate-hover);
  color: var(--text-inverse);
  text-decoration: none;
}

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

.btn--ghost:hover {
  background: var(--accent-muted);
  text-decoration: none;
}

.btn--sm { padding: 7px 14px; font-size: 0.8rem; }
.btn--lg { padding: 13px 28px; font-size: 1rem; }
.btn--full { width: 100%; }

.btn:disabled, .btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ============================================================
   RESULTS PANEL
   ============================================================ */
.results-panel {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.results-header {
  background: var(--slate);
  color: var(--text-inverse);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.results-header h3 {
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-inverse);
  margin: 0;
}

.results-body {
  padding: 20px;
}

.result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}

.result-row:last-child { border-bottom: none; }

.result-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  flex: 1;
}

.result-value {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: right;
}

.result-row--highlight .result-label {
  color: var(--text-primary);
  font-weight: 600;
}

.result-row--highlight .result-value {
  color: var(--accent);
  font-size: 1.15rem;
}

.result-row--total {
  background: var(--accent-muted);
  margin: 8px -20px -20px;
  padding: 14px 20px;
  border-bottom: none;
}

.result-row--total .result-label {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.result-row--total .result-value {
  color: var(--accent-hover);
  font-size: 1.25rem;
  font-weight: 700;
}

/* Stat grid */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--bg-subtle);
  border-radius: var(--r-md);
  padding: 14px 16px;
  text-align: center;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.3;
}

.stat-card--accent {
  background: var(--accent-muted);
  border: 1px solid var(--accent-border);
}

.stat-card--accent .stat-value { color: var(--accent-hover); }

.stat-card--slate {
  background: var(--slate-muted);
}

.stat-card--slate .stat-value { color: var(--slate); }

/* ============================================================
   CHART CONTAINER
   ============================================================ */
.chart-wrap {
  position: relative;
  width: 100%;
  height: 280px;
  margin-top: 20px;
}

.chart-title {
  font-family: var(--font-head);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.75rem;
}

/* ============================================================
   INFO / ALERT BOXES
   ============================================================ */
.alert {
  padding: 12px 16px;
  border-radius: var(--r-md);
  font-size: 0.875rem;
  line-height: 1.5;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

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

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

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

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

.alert-icon { font-size: 14px; flex-shrink: 0; margin-top: 1px; }

/* ============================================================
   TABLES
   ============================================================ */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.data-table th {
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 10px 12px;
  text-align: left;
  border-bottom: 2px solid var(--border);
  background: var(--bg-subtle);
}

.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  vertical-align: top;
}

.data-table tr:last-child td { border-bottom: none; }

.data-table tr:hover td { background: var(--bg-subtle); }

.data-table td.mono { font-family: var(--font-mono); font-size: 0.85rem; }
.data-table td.bold { font-weight: 600; color: var(--text-primary); }

.data-table td.amber { color: var(--accent-hover); font-weight: 600; font-family: var(--font-mono); }
.data-table td.green { color: var(--success); font-weight: 600; }
.data-table td.red   { color: var(--error); font-weight: 600; }

/* ============================================================
   DEADLINE / STATUS BADGES
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 20px;
  line-height: 1;
}

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

.badge--amber {
  background: var(--warning-bg);
  color: var(--accent-hover);
  border: 1px solid var(--warning-border);
}

.badge--red {
  background: var(--error-bg);
  color: var(--error);
  border: 1px solid var(--error-border);
}

.badge--slate {
  background: var(--slate-muted);
  color: var(--slate);
  border: 1px solid rgba(30,58,95,0.2);
}

.badge--neutral {
  background: var(--bg-subtle);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

/* ============================================================
   PROGRESS BAR
   ============================================================ */
.progress-wrap {
  background: var(--bg-subtle);
  border-radius: 4px;
  height: 8px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  border-radius: 4px;
  background: var(--accent);
  transition: width 0.4s ease;
}

.progress-bar--slate { background: var(--slate); }
.progress-bar--green { background: var(--success); }
.progress-bar--red   { background: var(--error); }

/* ============================================================
   TABS
   ============================================================ */
.tabs {
  display: flex;
  gap: 2px;
  border-bottom: 2px solid var(--border);
  margin-bottom: 24px;
  overflow-x: auto;
}

.tab-btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  padding: 10px 18px;
  font-family: var(--font-head);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}

.tab-btn:hover { color: var(--text-primary); }

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ============================================================
   NOTICE / DISCLAIMER
   ============================================================ */
.disclaimer {
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 14px 16px;
  background: var(--bg-subtle);
  border-radius: var(--r-md);
  border-left: 3px solid var(--border-strong);
  line-height: 1.5;
  margin-top: 24px;
}

/* ============================================================
   RELATED TOOLS
   ============================================================ */
.related-tools {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.related-tools h2 {
  font-size: 1.1rem;
  margin-bottom: 16px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.related-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 14px 16px;
  text-decoration: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.related-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}

.related-card-title {
  font-family: var(--font-head);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.related-card-cat {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--slate);
  color: rgba(255,255,255,0.7);
  padding: 40px 0 24px;
  margin-top: auto;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-brand .logo-text {
  color: #fff;
}

.footer-brand p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  margin-top: 10px;
  line-height: 1.6;
}

.footer-col h4 {
  font-family: var(--font-head);
  font-size: 0.8rem;
  font-weight: 700;
  color: rgba(255,255,255,0.9);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 12px;
}

.footer-col a {
  display: block;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  margin-bottom: 8px;
  transition: color 0.12s;
}

.footer-col a:hover { color: var(--accent-mid); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

.footer-bottom a {
  color: rgba(255,255,255,0.4);
  text-decoration: none;
}

.footer-bottom a:hover { color: var(--accent-mid); }

/* ============================================================
   MOBILE NAV (bottom bar)
   ============================================================ */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-white);
  border-top: 1px solid var(--border);
  padding: 8px 0 env(safe-area-inset-bottom, 8px);
  z-index: 200;
}

.mobile-nav-inner {
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.mobile-nav-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  padding: 4px 8px;
  border-radius: var(--r-sm);
  transition: color 0.12s;
}

.mobile-nav-link svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
}

.mobile-nav-link.active { color: var(--accent); }
.mobile-nav-link:hover { color: var(--accent); text-decoration: none; }

/* ============================================================
   HOMEPAGE HERO
   ============================================================ */
.home-hero {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  padding: 56px 0 48px;
  text-align: center;
}

.home-hero h1 {
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  line-height: 1.15;
}

.home-hero h1 em {
  color: var(--accent);
  font-style: normal;
}

.home-hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto 28px;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.hero-stat {
  text-align: center;
}

.hero-stat-num {
  font-family: var(--font-head);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.hero-stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.hero-sep {
  width: 1px;
  height: 36px;
  background: var(--border);
}

/* ============================================================
   SEARCH BAR
   ============================================================ */
.search-wrap {
  max-width: 520px;
  margin: 0 auto 0;
  position: relative;
}

.search-wrap input {
  padding-left: 42px;
  padding: 12px 12px 12px 42px;
  font-size: 0.95rem;
  border-radius: var(--r-md);
  box-shadow: var(--shadow-sm);
}

.search-icon {
  position: absolute;
  left: 13px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  width: 16px;
  height: 16px;
}

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.text-muted   { color: var(--text-muted); }
.text-sm      { font-size: 0.85rem; }
.text-xs      { font-size: 0.78rem; }
.text-mono    { font-family: var(--font-mono); }
.text-right   { text-align: right; }
.text-center  { text-align: center; }
.text-accent  { color: var(--accent); }
.text-success { color: var(--success); }
.text-error   { color: var(--error); }
.text-slate   { color: var(--slate); }

.mt-0  { margin-top: 0; }
.mt-8  { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-0  { margin-bottom: 0; }
.mb-8  { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }

.hidden { display: none !important; }
.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;
}

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 24px 0;
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8  { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.flex-1 { flex: 1; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .tool-layout {
    grid-template-columns: 1fr;
  }

  .tool-sidebar {
    position: static;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }

  .home-hero { padding: 36px 0 32px; }
  .home-hero h1 { font-size: 1.8rem; }

  .site-nav { display: none; }
  .site-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-white);
    border-bottom: 2px solid var(--border);
    padding: 8px 16px 16px;
    gap: 2px;
    z-index: 200;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  }
  .site-nav.open a {
    padding: 12px 12px;
    border-radius: var(--r-sm);
    font-size: 1rem;
  }
  .nav-toggle { display: flex; }

  .mobile-nav { display: block; }
  body { padding-bottom: 72px; }

  main { padding: 24px 0 60px; }

  .tools-grid { grid-template-columns: 1fr 1fr; }

  .form-row { grid-template-columns: 1fr; }

  .footer-inner { grid-template-columns: 1fr; gap: 20px; }

  .stat-grid { grid-template-columns: 1fr 1fr; }

  .hero-stats { gap: 16px; }
  .hero-sep { height: 24px; }
}

@media (max-width: 400px) {
  .tools-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   PRINT
   ============================================================ */
@media print {
  .site-header, .site-footer, .mobile-nav, .btn, .tool-sidebar { display: none !important; }
  body { background: #fff; color: #000; }
  .card { box-shadow: none; border: 1px solid #ccc; }
  main { padding: 0; }
}

/* ============================================================
   FAQ SECTION
   ============================================================ */
.faq-section {
  padding: 64px 0;
  background: var(--bg);
}

.faq-section .section-tag {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.faq-section .section-heading {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 32px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 24px;
  background: #fff;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  gap: 16px;
  transition: background 0.15s ease;
}

.faq-question:hover {
  background: var(--bg-alt, #f8f9fb);
}

.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-light);
  border-radius: 50%;
  color: var(--accent);
  transition: transform 0.2s ease;
}

.faq-question[aria-expanded="true"] .faq-icon {
  transform: rotate(45deg);
  background: var(--accent);
  color: #fff;
}

.faq-answer {
  display: none;
  padding: 0 24px 20px;
  background: #fff;
}

.faq-answer.faq-open {
  display: block;
}

.faq-answer p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
}

@media (max-width: 640px) {
  .faq-question { padding: 16px 18px; font-size: 0.9rem; }
  .faq-answer { padding: 0 18px 16px; }
  .faq-section { padding: 48px 0; }
}