/* ==========================================================================
   CALCUPORTAL BRAND DESIGN SYSTEM & HOMEPAGE STYLES
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap');

:root {
  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-heading: 'Plus Jakarta Sans', var(--font-sans);

  /* Light Theme Color Tokens */
  --bg-base: #faf9fd;
  --bg-surface: #ffffff;
  --bg-elevated: #f4f2f9;
  --bg-glass: rgba(255, 255, 255, 0.85);

  --border-subtle: #eae6f2;
  --border-medium: #d9d3e6;
  --border-focus: #7c3aed;

  --text-main: #161324;
  --text-muted: #534e66;
  --text-subtle: #847e9b;

  --primary: #6366f1;
  --primary-strong: #4f46e5;
  --primary-soft: #ede9fe;
  --primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
  --brand-glow: rgba(99, 102, 241, 0.15);

  /* Category & Accent Accents */
  --accent-finance: #059669;
  --accent-finance-soft: #ecfdf5;
  --accent-health: #e11d48;
  --accent-health-soft: #fff1f2;
  --accent-math: #2563eb;
  --accent-math-soft: #eff6ff;
  --accent-date: #d97706;
  --accent-date-soft: #fffbeb;
  --accent-convert: #7c3aed;
  --accent-convert-soft: #f5f3ff;
  --accent-fun: #db2777;
  --accent-fun-soft: #fdf2f8;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(22, 19, 36, 0.04);
  --shadow-sm: 0 4px 12px rgba(22, 19, 36, 0.05);
  --shadow-md: 0 10px 24px -4px rgba(22, 19, 36, 0.08), 0 4px 8px -2px rgba(22, 19, 36, 0.04);
  --shadow-lg: 0 20px 40px -8px rgba(22, 19, 36, 0.12), 0 8px 16px -4px rgba(22, 19, 36, 0.06);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.2);

  /* Layout */
  --container-max: 1260px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  --header-height: 72px;

  /* Transitions */
  --transition-fast: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-base: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark Theme Overrides */
[data-theme="dark"] {
  --bg-base: #0b0a11;
  --bg-surface: #14121d;
  --bg-elevated: #1b1827;
  --bg-glass: rgba(20, 18, 29, 0.85);

  --border-subtle: #252233;
  --border-medium: #36324a;
  --border-focus: #a78bfa;

  --text-main: #f6f4fd;
  --text-muted: #aca6c3;
  --text-subtle: #797394;

  --primary: #818cf8;
  --primary-strong: #6366f1;
  --primary-soft: #231d3d;
  --primary-gradient: linear-gradient(135deg, #818cf8 0%, #a78bfa 50%, #f472b6 100%);
  --brand-glow: rgba(129, 140, 248, 0.2);

  --accent-finance: #34d399;
  --accent-finance-soft: #064e3b33;
  --accent-health: #fb7185;
  --accent-health-soft: #88133733;
  --accent-math: #60a5fa;
  --accent-math-soft: #1e3a8a33;
  --accent-date: #fbbf24;
  --accent-date-soft: #78350f33;
  --accent-convert: #c084fc;
  --accent-convert-soft: #581c8733;
  --accent-fun: #f472b6;
  --accent-fun-soft: #83184333;

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 12px 28px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 24px 48px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 35px rgba(129, 140, 248, 0.25);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

button, input, select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

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

.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;
}

.container {
  width: min(var(--container-max), calc(100% - 2.5rem));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-base), border-color var(--transition-base);
}

.nav-wrapper {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.brand-logo > span {
  background: var(--primary-gradient);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.brand-icon-box {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.brand-icon-box svg {
  width: 22px;
  height: 22px;
}

.nav-center {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  padding: 0.5rem 0.9rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
  background-color: var(--bg-elevated);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.quick-search-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.9rem;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.quick-search-btn:hover {
  border-color: var(--border-medium);
  color: var(--text-main);
  background-color: var(--bg-surface);
}

.kbd-badge {
  font-size: 0.7rem;
  padding: 0.15rem 0.4rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  font-weight: 600;
  color: var(--text-subtle);
}

.theme-toggle-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border-color: var(--border-medium);
}

.menu-toggle {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  color: var(--text-main);
}

/* Mobile Nav Drawer */
.mobile-nav-panel {
  display: none;
  flex-direction: column;
  padding: 1rem 1.25rem 1.5rem;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  gap: 0.5rem;
}

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

/* Hero Section */
.hero-section {
  position: relative;
  padding: 3.5rem 0 4.5rem;
  overflow: clip;
}

.hero-glow-bg {
  position: absolute;
  top: -150px;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--brand-glow) 0%, transparent 70%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.hero-glow-bg-left {
  position: absolute;
  bottom: -200px;
  left: -150px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(217, 70, 239, 0.08) 0%, transparent 70%);
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background-color: var(--primary-soft);
  color: var(--primary-strong);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  width: fit-content;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--primary);
  box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.7);
  animation: pulseAnimation 2s infinite;
}

@keyframes pulseAnimation {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(99, 102, 241, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(99, 102, 241, 0); }
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 4.2vw, 3.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

.hero-title span {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-description {
  font-size: 1.12rem;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 540px;
}

.hero-search-wrapper {
  margin-top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.hero-search-bar {
  position: relative;
  display: flex;
  align-items: center;
  background-color: var(--bg-surface);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.4rem 0.6rem 0.4rem 1.1rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.hero-search-bar:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 4px var(--brand-glow), var(--shadow-md);
}

.search-icon {
  width: 22px;
  height: 22px;
  color: var(--text-subtle);
  margin-right: 0.75rem;
  flex-shrink: 0;
}

.hero-search-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 1.05rem;
  color: var(--text-main);
}

.hero-search-input::placeholder {
  color: var(--text-subtle);
  font-size: 0.98rem;
}

.search-clear-btn {
  display: none;
  padding: 0.25rem;
  color: var(--text-subtle);
  margin-right: 0.5rem;
}

.search-clear-btn.active {
  display: flex;
}

.search-action-btn {
  padding: 0.65rem 1.25rem;
  background: var(--primary-gradient);
  color: #ffffff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.search-action-btn:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

.trending-chips {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
  font-size: 0.82rem;
  color: var(--text-subtle);
}

.trending-label {
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--text-muted);
}

.trending-pill {
  padding: 0.2rem 0.6rem;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.trending-pill:hover {
  border-color: var(--border-focus);
  color: var(--primary);
  background-color: var(--bg-surface);
}

.trust-metrics {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-num {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.1;
}

.metric-label {
  font-size: 0.8rem;
  color: var(--text-subtle);
  font-weight: 500;
}

/* Sandbox Card */
.hero-sandbox-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  position: relative;
  backdrop-filter: blur(8px);
}

.sandbox-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.sandbox-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--primary);
  letter-spacing: 0.04em;
}

.sandbox-badge {
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  background-color: var(--accent-finance-soft);
  color: var(--accent-finance);
  font-weight: 700;
}

.sandbox-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.35rem;
  background-color: var(--bg-elevated);
  padding: 0.35rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.tab-btn {
  padding: 0.55rem 0.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  text-align: center;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  white-space: nowrap;
}

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

.tab-btn.active {
  background: var(--bg-surface);
  color: var(--text-main);
  box-shadow: var(--shadow-xs);
}

.sandbox-panel {
  display: none;
  flex-direction: column;
  gap: 1.25rem;
  animation: fadeIn 0.25s ease-out;
}

.sandbox-panel.active {
  display: flex;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.control-label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.88rem;
}

.control-title {
  color: var(--text-muted);
  font-weight: 500;
}

.control-value {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-main);
}

.calc-range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--border-medium);
  outline: none;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.calc-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid #ffffff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.1s ease;
}

[data-theme="dark"] .calc-range::-webkit-slider-thumb {
  border-color: #14121d;
}

.calc-range::-webkit-slider-thumb:hover {
  transform: scale(1.18);
  box-shadow: 0 0 0 6px var(--brand-glow);
}

.range-presets {
  display: flex;
  gap: 0.35rem;
}

.preset-chip {
  padding: 0.15rem 0.5rem;
  font-size: 0.72rem;
  font-weight: 600;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.preset-chip:hover {
  border-color: var(--border-focus);
  color: var(--primary);
}

.sandbox-result-box {
  background: linear-gradient(135deg, var(--bg-elevated) 0%, var(--bg-surface) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.15rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.result-primary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.result-main-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.result-main-value {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.proportion-bar-container {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.proportion-bar {
  display: flex;
  height: 8px;
  border-radius: var(--radius-full);
  overflow: hidden;
  background-color: var(--border-subtle);
}

.prop-principal {
  background-color: var(--accent-finance);
  transition: width 0.3s ease;
}

.prop-interest {
  background-color: var(--primary);
  transition: width 0.3s ease;
}

.proportion-legend {
  display: flex;
  justify-content: space-between;
  font-size: 0.76rem;
  color: var(--text-muted);
  font-weight: 500;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.legend-dot.principal { background-color: var(--accent-finance); }
.legend-dot.interest { background-color: var(--primary); }

.result-secondary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--border-subtle);
}

.secondary-item {
  display: flex;
  flex-direction: column;
}

.secondary-label {
  font-size: 0.76rem;
  color: var(--text-subtle);
}

.secondary-value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.input-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.input-styled {
  padding: 0.65rem 0.9rem;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text-main);
  outline: none;
  transition: border-color var(--transition-fast);
}

.input-styled:focus {
  border-color: var(--border-focus);
}

.age-stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  text-align: center;
}

.age-stat-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.75rem 0.5rem;
}

.age-stat-num {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
}

.age-stat-lbl {
  font-size: 0.74rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
}

.birthday-countdown-pill {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background-color: var(--accent-date-soft);
  color: var(--accent-date);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-weight: 600;
}

.bmi-gauge-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.bmi-spectrum-bar {
  position: relative;
  height: 10px;
  border-radius: var(--radius-full);
  background: linear-gradient(to right, #38bdf8 0%, #10b981 35%, #f59e0b 65%, #ef4444 100%);
}

.bmi-pointer {
  position: absolute;
  top: -4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ffffff;
  border: 3px solid #161324;
  box-shadow: 0 2px 4px rgba(0,0,0,0.3);
  transform: translateX(-50%);
  transition: left 0.3s ease;
}

.bmi-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  width: fit-content;
}

.bmi-status-normal { background: var(--accent-finance-soft); color: var(--accent-finance); }
.bmi-status-under { background: var(--accent-math-soft); color: var(--accent-math); }
.bmi-status-over { background: var(--accent-date-soft); color: var(--accent-date); }
.bmi-status-obese { background: var(--accent-health-soft); color: var(--accent-health); }

.full-tool-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  margin-top: 0.5rem;
  transition: gap var(--transition-fast);
}

.full-tool-link:hover {
  gap: 0.6rem;
  color: var(--primary-strong);
}

/* Search Results Section */
.search-results-section {
  display: none;
  padding: 2.5rem 0;
  animation: fadeIn 0.3s ease-out;
}

.search-results-section.active {
  display: block;
}

.search-results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.results-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
}

.results-count-pill {
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background-color: var(--primary-soft);
  color: var(--primary-strong);
  font-size: 0.82rem;
  font-weight: 600;
}

.search-results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.no-results-box {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem 1.5rem;
  background-color: var(--bg-surface);
  border: 1px dashed var(--border-medium);
  border-radius: var(--radius-lg);
}

/* Section Common */
.section {
  padding: 4.5rem 0;
}

.section-alt {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 2.5rem;
  gap: 1.5rem;
}

.section-header-left {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 650px;
}

.section-tag {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3vw, 2.3rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

.section-header-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--primary);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-full);
  background-color: var(--primary-soft);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.section-header-link:hover {
  background-color: var(--primary);
  color: #ffffff;
  transform: translateX(2px);
}

/* Tools Filter Bar */
.tools-filter-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.75rem;
  margin-bottom: 2rem;
  scrollbar-width: none;
}

.tools-filter-bar::-webkit-scrollbar {
  display: none;
}

.filter-pill {
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-fast);
}

.filter-pill:hover {
  border-color: var(--border-medium);
  color: var(--text-main);
}

.filter-pill.active {
  background-color: var(--text-main);
  color: var(--bg-base);
  border-color: var(--text-main);
}

/* Tools Grid */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.tool-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-medium);
}

.tool-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tool-icon-box {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.tool-card:hover .tool-icon-box {
  transform: scale(1.08);
}

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

.tool-icon-finance { background-color: var(--accent-finance-soft); color: var(--accent-finance); }
.tool-icon-health { background-color: var(--accent-health-soft); color: var(--accent-health); }
.tool-icon-math { background-color: var(--accent-math-soft); color: var(--accent-math); }
.tool-icon-date { background-color: var(--accent-date-soft); color: var(--accent-date); }
.tool-icon-convert { background-color: var(--accent-convert-soft); color: var(--accent-convert); }
.tool-icon-fun { background-color: var(--accent-fun-soft); color: var(--accent-fun); }

.tool-category-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-elevated);
  color: var(--text-subtle);
}

.tool-card-body {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex-grow: 1;
}

.tool-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
}

.tool-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.tool-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

.tool-cta-text {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--primary);
  transition: gap var(--transition-fast);
}

.tool-card:hover .tool-cta-text {
  gap: 0.55rem;
}

/* Category Cards */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.5rem;
}

.category-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.category-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-medium);
}

.category-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.category-icon-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.cat-emoji {
  font-size: 1.75rem;
  line-height: 1;
}

.cat-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
}

.cat-tool-count {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  background-color: var(--bg-elevated);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  white-space: nowrap;
}

.category-quicklinks {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.75rem;
}

.cat-sublink {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.25rem 0;
  transition: color var(--transition-fast);
}

.cat-sublink:hover {
  color: var(--primary);
}

.category-view-all {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--primary);
  margin-top: auto;
}

/* Editorial Layout */
.editorial-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2rem;
  align-items: stretch;
}

.featured-article-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.featured-article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.article-hero-banner {
  height: 200px;
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4338ca 100%);
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: 1.5rem;
  color: #ffffff;
}

.banner-pill {
  position: absolute;
  top: 1.25rem;
  left: 1.25rem;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.article-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  flex-grow: 1;
}

.article-meta-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-subtle);
  font-weight: 500;
}

.article-title {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
}

.article-excerpt {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.article-footer-cta {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
}

.trending-articles-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.compact-article-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  display: flex;
  gap: 1.25rem;
  align-items: center;
  transition: all var(--transition-fast);
}

.compact-article-item:hover {
  transform: translateX(4px);
  border-color: var(--border-medium);
  box-shadow: var(--shadow-sm);
}

.article-order-num {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-subtle);
  line-height: 1;
  flex-shrink: 0;
}

.compact-article-item:hover .article-order-num {
  color: var(--primary);
}

.compact-article-content {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex-grow: 1;
}

.compact-article-tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--primary);
}

.compact-article-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.35;
}

.article-arrow-icon {
  width: 20px;
  height: 20px;
  color: var(--text-subtle);
  flex-shrink: 0;
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.compact-article-item:hover .article-arrow-icon {
  transform: translate(2px, -2px);
  color: var(--primary);
}

.topic-pills-row {
  margin-top: 2rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.topic-pill {
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.topic-pill:hover {
  background-color: var(--bg-surface);
  border-color: var(--border-focus);
  color: var(--primary);
}

/* Feature Boxes (Why CalcuPortal) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.75rem;
}

.feature-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
}

.feature-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--primary-soft);
  color: var(--primary-strong);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon-wrapper svg {
  width: 24px;
  height: 24px;
}

.feature-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* FAQ Accordion */
.faq-container {
  max-width: 820px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

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

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

.faq-question-btn {
  width: 100%;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  background: none;
}

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

.faq-item.active .faq-icon-chevron {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
}

.faq-item.active .faq-answer-panel {
  max-height: 400px;
  transition: max-height 0.35s ease-in-out;
}

.faq-answer-content {
  padding: 0 1.5rem 1.25rem 1.5rem;
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Disclaimer */
.disclaimer-banner {
  background-color: var(--bg-elevated);
  border-top: 1px solid var(--border-subtle);
  padding: 1.25rem 0;
  font-size: 0.82rem;
  color: var(--text-subtle);
  text-align: center;
}

.disclaimer-banner a {
  color: var(--primary);
  text-decoration: underline;
}

/* Footer */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 4.5rem 0 2rem;
  margin-top: auto;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-tagline {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 320px;
}

.footer-col-title {
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-main);
  margin-bottom: 1.25rem;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--primary);
}

.footer-bottom-bar {
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.84rem;
  color: var(--text-subtle);
}

.footer-legal-links {
  display: flex;
  gap: 1.5rem;
}

.footer-legal-links a:hover {
  color: var(--text-main);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .editorial-layout {
    grid-template-columns: 1fr;
  }

  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  .nav-center {
    display: none;
  }

  .quick-search-btn .kbd-badge {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .hero-section {
    padding: 2.5rem 0 3.5rem;
  }

  .trust-metrics {
    flex-wrap: wrap;
    gap: 1.25rem 2rem;
  }

  .sandbox-tabs {
    grid-template-columns: 1fr 1fr;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom-bar {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-search-bar {
    flex-direction: column;
    align-items: stretch;
    padding: 0.6rem;
    gap: 0.5rem;
  }

  .search-action-btn {
    justify-content: center;
  }

  .hero-sandbox-card {
    padding: 1.25rem;
  }

  .result-main-value {
    font-size: 1.5rem;
  }
}

/* Production accessibility and narrow-screen safeguards. */
.original-logo{width:44px;height:44px;object-fit:contain;flex-shrink:0}.skip-link{position:absolute;left:1rem;top:-6rem;z-index:2000;padding:.7rem 1rem;background:var(--bg-surface);color:var(--text-main)}.skip-link:focus{top:1rem}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--border-focus);outline-offset:4px}[hidden]{display:none!important}.calculator-note,#age-error,.filter-empty{font-size:.82rem;color:var(--text-muted);margin:0 0 1rem}.hero-grid>*{min-width:0}.tools-grid,.categories-grid,.search-results-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr))}.hero-search-input{min-width:0}.brand-logo{white-space:nowrap}.sandbox-panel{scroll-margin-top:90px}#search-results-section{scroll-margin-top:90px}
@media(max-width:1100px){.nav-center{display:none}.menu-toggle{display:flex}}
@media(max-width:480px){.quick-search-btn{display:none}.brand-logo{font-size:1.2rem}.nav-actions{gap:.65rem}.container{padding-left:1rem;padding-right:1rem}.hero-search-input{font-size:16px}.hero-search-bar .search-icon{display:none}.result-secondary-grid{grid-template-columns:1fr}.bmi-labels{font-size:.65rem}.sandbox-top-header{flex-wrap:wrap}.trust-metrics{gap:1rem}.hero-sandbox-card{min-width:0}.section-title{overflow-wrap:anywhere}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}html{scroll-behavior:auto}}