/* ===== DESIGN TOKENS — VTI & Chill ===== */
/* Art Direction: Finance + Calm + Growth. Deep navy backgrounds, mint/teal accents, clean sans-serif. */

:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

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

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;

  /* Fonts */
  --font-display: 'General Sans', 'Inter', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;
}

/* ===== LIGHT MODE (default) ===== */
:root, [data-theme="light"] {
  --color-bg:             #f8f9fa;
  --color-surface:        #ffffff;
  --color-surface-2:      #f0f2f5;
  --color-surface-offset: #e9ecef;
  --color-border:         #dee2e6;
  --color-divider:        #e9ecef;

  --color-text:           #1a1a2e;
  --color-text-muted:     #6c757d;
  --color-text-faint:     #adb5bd;
  --color-text-inverse:   #ffffff;

  --color-primary:        #00d4aa;
  --color-primary-hover:  #00b894;
  --color-primary-active: #009d7e;
  --color-primary-rgb:    0, 212, 170;

  --color-navy:           #1a1a2e;
  --color-navy-light:     #16213e;
  --color-navy-mid:       #0f3460;

  --color-success:        #00d4aa;
  --color-error:          #e74c3c;
  --color-warning:        #f39c12;

  --shadow-sm: 0 1px 3px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 4px 12px rgba(26, 26, 46, 0.08);
  --shadow-lg: 0 12px 32px rgba(26, 26, 46, 0.12);
}

/* ===== DARK MODE ===== */
[data-theme="dark"] {
  --color-bg:             #0d1117;
  --color-surface:        #161b22;
  --color-surface-2:      #1c2333;
  --color-surface-offset: #21293a;
  --color-border:         #30363d;
  --color-divider:        #21262d;

  --color-text:           #e6edf3;
  --color-text-muted:     #8b949e;
  --color-text-faint:     #6e7681;
  --color-text-inverse:   #0d1117;

  --color-primary:        #00d4aa;
  --color-primary-hover:  #33dfbe;
  --color-primary-active: #66e9d1;
  --color-primary-rgb:    0, 212, 170;

  --color-navy:           #0d1117;
  --color-navy-light:     #161b22;
  --color-navy-mid:       #1c2333;

  --color-success:        #00d4aa;
  --color-error:          #f85149;
  --color-warning:        #d29922;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #0d1117;
    --color-surface:        #161b22;
    --color-surface-2:      #1c2333;
    --color-surface-offset: #21293a;
    --color-border:         #30363d;
    --color-divider:        #21262d;
    --color-text:           #e6edf3;
    --color-text-muted:     #8b949e;
    --color-text-faint:     #6e7681;
    --color-text-inverse:   #0d1117;
    --color-primary:        #00d4aa;
    --color-primary-hover:  #33dfbe;
    --color-primary-active: #66e9d1;
    --color-primary-rgb:    0, 212, 170;
    --color-navy:           #0d1117;
    --color-navy-light:     #161b22;
    --color-navy-mid:       #1c2333;
    --color-success:        #00d4aa;
    --color-error:          #f85149;
    --color-warning:        #d29922;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  }
}

/* ===== GLOBAL STYLES ===== */

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
a:hover { color: var(--color-primary-hover); }

/* ===== LAYOUT ===== */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container--narrow {
  max-width: var(--content-narrow);
}

.container--default {
  max-width: var(--content-default);
}

.section-padding {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

/* ===== HEADER / NAV ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.3s var(--ease-out);
}

.site-header--scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-3);
  gap: var(--space-4);
}

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
  text-decoration: none;
}
.logo-link:hover { color: var(--color-primary); }

.nav-desktop {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-desktop a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
  position: relative;
}
.nav-desktop a:hover,
.nav-desktop a.active {
  color: var(--color-text);
}
.nav-desktop a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

/* Mobile nav */
.mobile-menu-btn {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  border-radius: var(--radius-md);
}
.mobile-menu-btn:hover { background: var(--color-surface-2); }

.nav-mobile {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  padding: var(--space-4) var(--space-6);
}
.nav-mobile.open { display: block; }
.nav-mobile a {
  display: block;
  padding: var(--space-3) 0;
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-divider);
}
.nav-mobile a:last-child { border-bottom: none; }

@media (max-width: 768px) {
  .nav-desktop { display: none; }
  .mobile-menu-btn { display: flex; }
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); box-shadow: var(--shadow-sm); }

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

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

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  padding: var(--space-2) var(--space-4);
}
.btn--ghost:hover { background: rgba(var(--color-primary-rgb), 0.1); }

.btn--large {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

/* ===== CARDS ===== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: transform var(--transition-interactive),
              box-shadow var(--transition-interactive),
              border-color var(--transition-interactive);
}
.card--hover:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.card--dark {
  background: var(--color-navy);
  border-color: rgba(255,255,255,0.08);
  color: #fff;
}

/* ===== HERO SECTION ===== */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--color-navy);
  color: #fff;
  padding: clamp(var(--space-16), 12vw, var(--space-32)) 0;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(0, 212, 170, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(0, 100, 148, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-4);
}

.hero .subtitle {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin-bottom: var(--space-8);
  line-height: 1.5;
}

.hero .mint { color: var(--color-primary); }

/* ===== GROWTH COUNTER ===== */
.growth-counter {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-2);
  background: rgba(0, 212, 170, 0.08);
  border: 1px solid rgba(0, 212, 170, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-6);
  margin-bottom: var(--space-8);
  font-variant-numeric: tabular-nums;
}
.growth-counter .label {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
}
.growth-counter .value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
}
.growth-counter .sub {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
}

/* ===== PORTFOLIO TIERS ===== */
.tiers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
}

.tier-card {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: center;
  transition: transform var(--transition-interactive),
              box-shadow var(--transition-interactive),
              border-color var(--transition-interactive);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.tier-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.tier-card.tier--good:hover { border-color: #00d4aa; }
.tier-card.tier--better:hover { border-color: #0f3460; }
.tier-card.tier--best:hover { border-color: #e8af34; }

.tier-badge {
  display: inline-block;
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
}
.tier--good .tier-badge { background: rgba(0, 212, 170, 0.15); color: #00b894; }
.tier--better .tier-badge { background: rgba(15, 52, 96, 0.15); color: #0f3460; }
[data-theme="dark"] .tier--better .tier-badge { background: rgba(79, 152, 163, 0.15); color: #4f98a3; }
.tier--best .tier-badge { background: rgba(232, 175, 52, 0.15); color: #d19900; }

.tier-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.tier-card .tier-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  line-height: 1.6;
}

.tier-funds {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  margin-bottom: var(--space-6);
}

.fund-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--color-text-muted);
}

.tier-return {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.tier-return-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ===== STATS ROW ===== */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-6);
  text-align: center;
}

.stat-item .stat-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.stat-item .stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* ===== EMAIL CAPTURE ===== */
.email-capture {
  background: var(--color-navy);
  color: #fff;
  border-radius: var(--radius-xl);
  padding: var(--space-10);
  text-align: center;
}

.email-capture h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.email-capture p {
  color: rgba(255,255,255,0.7);
  margin-bottom: var(--space-6);
  max-width: 480px;
  margin-inline: auto;
}

.email-form {
  display: flex;
  gap: var(--space-3);
  max-width: 480px;
  margin-inline: auto;
}

.email-form input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-md);
  color: #fff;
  font-size: var(--text-sm);
}
.email-form input::placeholder { color: rgba(255,255,255,0.4); }
.email-form input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.2);
}

@media (max-width: 480px) {
  .email-form { flex-direction: column; }
}

/* ===== FOOTER ===== */
.site-footer {
  background: var(--color-navy);
  color: rgba(255,255,255,0.7);
  padding: var(--space-12) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}

.footer-brand p {
  font-size: var(--text-sm);
  max-width: 300px;
  line-height: 1.7;
  color: rgba(255,255,255,0.5);
}

.footer-col h4 {
  font-size: var(--text-sm);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-col a {
  display: block;
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
  padding-block: var(--space-1);
  text-decoration: none;
}
.footer-col a:hover { color: var(--color-primary); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.4);
}

.footer-bottom a {
  color: rgba(255,255,255,0.5);
}
.footer-bottom a:hover { color: var(--color-primary); }

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
  .footer-bottom { flex-direction: column; gap: var(--space-2); text-align: center; }
}

/* ===== PHILOSOPHY PAGE ===== */
.philosophy-section {
  padding: var(--space-12) 0;
  border-bottom: 1px solid var(--color-divider);
}
.philosophy-section:last-of-type { border-bottom: none; }

.philosophy-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.philosophy-section p {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.quote-block {
  border-left: 3px solid var(--color-primary);
  padding-left: var(--space-6);
  margin: var(--space-6) 0;
  font-style: italic;
  color: var(--color-text);
  font-size: var(--text-base);
  line-height: 1.7;
}

.quote-block cite {
  display: block;
  margin-top: var(--space-2);
  font-style: normal;
  font-size: var(--text-sm);
  color: var(--color-text-faint);
}

/* ===== CHART CONTAINER ===== */
.chart-container {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin: var(--space-8) 0;
}

.chart-container h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.chart-wrapper {
  position: relative;
  width: 100%;
  height: 400px;
}

@media (max-width: 640px) {
  .chart-wrapper { height: 280px; }
}

/* ===== PORTFOLIO BUILDER ===== */
.builder-tabs {
  display: flex;
  gap: var(--space-2);
  background: var(--color-surface-2);
  border-radius: var(--radius-lg);
  padding: var(--space-1);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.builder-tab {
  flex: 1;
  min-width: 120px;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  text-align: center;
  cursor: pointer;
  border: none;
  background: transparent;
  transition: all var(--transition-interactive);
}
.builder-tab:hover { color: var(--color-text); }
.builder-tab.active {
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}

.builder-content {
  display: none;
}
.builder-content.active { display: block; }

.allocation-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: start;
}

@media (max-width: 768px) {
  .allocation-grid { grid-template-columns: 1fr; }
}

.allocation-table {
  width: 100%;
  border-collapse: collapse;
}
.allocation-table th {
  text-align: left;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-faint);
  padding: var(--space-2) var(--space-3);
  border-bottom: 2px solid var(--color-border);
}
.allocation-table td {
  padding: var(--space-3);
  font-size: var(--text-sm);
  border-bottom: 1px solid var(--color-divider);
  font-variant-numeric: tabular-nums;
}
.allocation-table .ticker {
  font-weight: 700;
  color: var(--color-primary);
}

.pie-chart-container {
  position: relative;
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
}

/* Comparison section */
.comparison-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.comparison-stat {
  text-align: center;
  padding: var(--space-4);
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
}
.comparison-stat .comp-value {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}
.comparison-stat .comp-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* ===== TOOLS PAGE ===== */
.calculator-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: start;
}

@media (max-width: 768px) {
  .calc-grid { grid-template-columns: 1fr; }
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15);
}

.calc-result {
  background: var(--color-surface-2);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
}

.calc-result .result-value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
  margin-bottom: var(--space-2);
}

.calc-result .result-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Range slider */
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  background: var(--color-surface-2);
  border-radius: var(--radius-full);
  outline: none;
  border: none;
  padding: 0;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
  border: 3px solid var(--color-surface);
  box-shadow: var(--shadow-sm);
}

/* ===== LEARNING CENTER ===== */
.modules-list {
  display: grid;
  gap: var(--space-4);
}

.module-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-4);
  align-items: center;
  padding: var(--space-5) var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-interactive);
}
.module-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.module-number {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
}

.module-info h3 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.module-info p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.module-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  white-space: nowrap;
}

/* ===== BLOG ===== */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
}

.blog-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-interactive);
}
.blog-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.blog-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--color-surface-2);
}

.blog-card-body {
  padding: var(--space-5) var(--space-6);
}

.blog-card-meta {
  display: flex;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-2);
}

.blog-card-body h3 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
  line-height: 1.4;
}

.blog-card-body p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.blog-tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
}

/* ===== COMMUNITY ===== */
.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.community-card {
  text-align: center;
  padding: var(--space-8);
}

.community-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  background: rgba(var(--color-primary-rgb), 0.1);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

/* ===== ABOUT PAGE ===== */
.about-hero {
  text-align: center;
  padding: var(--space-16) 0 var(--space-10);
}

.about-hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-6);
}

.value-card {
  padding: var(--space-6);
}
.value-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-3);
}
.value-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== PAGE HEADERS ===== */
.page-header {
  background: var(--color-navy);
  color: #fff;
  padding: clamp(var(--space-10), 6vw, var(--space-16)) 0;
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.page-header p {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.7);
  max-width: 600px;
}

/* ===== DISCLAIMER ===== */
.disclaimer {
  background: var(--color-surface-2);
  border-left: 3px solid var(--color-warning);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-8);
  line-height: 1.6;
}

/* ===== SCROLL ANIMATIONS ===== */
.fade-in { opacity: 1; }

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}

@keyframes reveal-fade { to { opacity: 1; } }

/* Responsive two-column sections */
@media (max-width: 768px) {
  .responsive-two-col {
    grid-template-columns: 1fr !important;
  }
  .responsive-two-col .philosophy-card-grid {
    grid-template-columns: 1fr !important;
  }
}

/* Toggle switch */
.toggle-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.toggle-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
}
.toggle-label.active { color: var(--color-text); font-weight: 600; }

.toggle-switch {
  position: relative;
  width: 48px;
  height: 26px;
  background: var(--color-surface-offset);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--transition-interactive);
  border: 1px solid var(--color-border);
}
.toggle-switch.active { background: var(--color-primary); border-color: var(--color-primary); }
.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: #fff;
  border-radius: 50%;
  transition: transform var(--transition-interactive);
  box-shadow: var(--shadow-sm);
}
.toggle-switch.active::after { transform: translateX(22px); }

/* ===== TAGLINES ===== */
.tagline-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}
.tagline-chip {
  padding: var(--space-2) var(--space-4);
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  color: rgba(255,255,255,0.7);
}