/* ============================================================
   SVDE — Silicon Valley Digital Equity
   Shared Stylesheet
   ============================================================ */

/* ── Web Font ───────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;0,9..40,800;1,9..40,400;1,9..40,500&display=swap');

/* ── Brand Colors ───────────────────────────────────────────── */
/*
   SVDE Brand Palette
   Primary:  #1a4a8f  — deep navy-blue (trust, technology, institutional)
   Accent:   #0ea5e9  — sky blue (modern, approachable, distinct from primary)
   Impact:   #16a34a  — green (reserved for success, impact, and positive outcomes)
   Neutral:  white + ink
*/

/* ── Variables ─────────────────────────────────────────────── */
:root {
  --navy:        #0b2347;          /* brand: darkest blue — hero/header backgrounds  */
  --blue:        #1a4a8f;          /* brand primary — buttons, nav logo, step numbers */
  --blue-bright: #0ea5e9;          /* brand accent — highlights, links, hover states  */
  --blue-light:  #bae6fd;          /* accent tint border */
  --blue-pale:   #f0f9ff;          /* accent tint background */
  --green:       #16a34a;          /* impact green — success, stats, checkmarks */
  --green-light: #dcfce7;
  --orange:      #ea580c;
  --orange-light:#ffedd5;

  --ink:         #111827;
  --ink-light:   #374151;
  --muted:       #6b7280;
  --border:      #e5e7eb;
  --surface:     #f9fafb;
  --white:       #ffffff;

  --font: 'DM Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;

  --radius:    0.75rem;
  --radius-sm: 0.375rem;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow:    0 4px 16px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 20px 48px rgba(0,0,0,0.12), 0 8px 16px rgba(0,0,0,0.06);

  --transition: 0.2s ease;
  --nav-h: 71px;
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html  { scroll-behavior: smooth; font-size: 16px; }
body  { font-family: var(--font); color: var(--ink); background: var(--white); line-height: 1.6; -webkit-font-smoothing: antialiased; }
img   { max-width: 100%; display: block; }
a     { color: inherit; text-decoration: none; }
ul    { list-style: none; }
button { font-family: var(--font); }

/* ── Typography ─────────────────────────────────────────────── */
h1 { font-size: clamp(1.875rem, 3.5vw, 2.5rem); font-weight: 800; line-height: 1.2; letter-spacing: -0.025em; }
h2 { font-size: clamp(1.5rem, 2.5vw, 2rem);     font-weight: 700; line-height: 1.25; letter-spacing: -0.02em; }
h3 { font-size: 1.25rem;  font-weight: 600; line-height: 1.4; }
h4 { font-size: 0.9375rem; font-weight: 700; line-height: 1.5; }

p  { line-height: 1.75; color: var(--ink-light); }

.lead {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--ink-light);
}

.eyebrow {
  font-size: 0.6875rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--blue-bright);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.eyebrow::before {
  content: '';
  display: inline-block;
  width: 18px;
  height: 2px;
  background: var(--blue-bright);
  border-radius: 2px;
  flex-shrink: 0;
}

/* ── Layout ─────────────────────────────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section { padding: 5rem 0; }
.section-sm { padding: 3rem 0; }

.section-header {
  max-width: 640px;
  margin: 0 auto 3.5rem;
  text-align: center;
}
.section-header .eyebrow { display: block; margin-bottom: 0.75rem; }
.section-header h2       { margin-bottom: 0.875rem; }
.section-header p        { font-size: 1.0625rem; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.625rem;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  line-height: 1;
}

.btn-lg { padding: 0.9375rem 2.125rem; font-size: 1rem; }

.btn-primary {
  background: var(--blue-bright);
  color: var(--white);
  border-color: var(--blue-bright);
}
.btn-primary:hover {
  background: #1d4ed8;
  border-color: #1d4ed8;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(37,99,235,0.35);
}

.btn-secondary {
  background: transparent;
  color: var(--blue-bright);
  border-color: var(--blue-bright);
}
.btn-secondary:hover {
  background: var(--blue-pale);
  transform: translateY(-1px);
}

.btn-white {
  background: var(--white);
  color: var(--navy);
  border-color: var(--white);
}
.btn-white:hover {
  background: var(--blue-pale);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(255,255,255,0.25);
}

.btn-outline-white {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.55);
}
.btn-outline-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--white);
}

.btn-green {
  background: var(--green);
  color: var(--white);
  border-color: var(--green);
}
.btn-green:hover {
  background: #15803d;
  border-color: #15803d;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(22,163,74,0.35);
}

/* ── Navigation ─────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
/* Thin accent bar at top of page — brand gradient */
.nav::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, #1a4a8f 0%, #0ea5e9 60%, #16a34a 100%);
}
.nav.scrolled { box-shadow: var(--shadow); }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo-mark {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, #1a4a8f 0%, #0ea5e9 100%);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.625rem; font-weight: 900;
  color: white; letter-spacing: -0.01em;
  flex-shrink: 0;
  line-height: 1;
  text-align: center;
}

.nav-logo-text    { display: flex; flex-direction: column; line-height: 1.1; }
.nav-logo-abbr    { font-size: 0.9375rem; font-weight: 800; color: var(--navy); letter-spacing: -0.02em; }
.nav-logo-full    { font-size: 0.625rem; color: var(--muted); font-weight: 500; letter-spacing: 0.01em; }

.nav-links { display: flex; align-items: center; gap: 0.125rem; }

.nav-link {
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem; font-weight: 500;
  color: var(--ink-light);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  text-decoration: none;
}
.nav-link:hover, .nav-link.active {
  color: var(--blue-bright);
  background: var(--blue-pale);
}

.nav-cta { margin-left: 0.75rem; }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none; border: none;
  cursor: pointer;
  padding: 0.5rem; border-radius: var(--radius-sm);
}
.nav-hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--ink); border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: center;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.75rem 1rem 1rem;
  border-top: 1px solid var(--border);
}
.nav-mobile.open { display: flex; }
.nav-mobile .nav-link { display: block; padding: 0.625rem 0.875rem; }
.nav-mobile .btn { align-self: flex-start; margin-top: 0.5rem; }

/* ── Page Header (inner pages) ──────────────────────────────── */
.page-header {
  padding-top: var(--nav-h);
  background: linear-gradient(155deg, #0b2347 0%, #1a4a8f 55%, #113372 100%);
  color: var(--white);
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 2.5rem), 0 100%);
  margin-bottom: 0.5rem;
}
.page-header::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}
.page-header-inner {
  position: relative; z-index: 1;
  padding: 3.5rem 0 3rem;
}
.page-header .eyebrow { color: rgba(255,255,255,0.55); display: block; margin-bottom: 0.875rem; }
.page-header h1       { color: var(--white); margin-bottom: 0.875rem; }
.page-header .lead    { color: rgba(255,255,255,0.75); max-width: 600px; }

.breadcrumb {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.45);
  margin-bottom: 1.5rem;
}
.breadcrumb a { color: rgba(255,255,255,0.45); transition: color var(--transition); }
.breadcrumb a:hover { color: rgba(255,255,255,0.8); }
.breadcrumb-sep { color: rgba(255,255,255,0.25); }

/* ── Hero ───────────────────────────────────────────────────── */
.hero {
  padding-top: var(--nav-h);
  background: linear-gradient(155deg, #0b2347 0%, #1a4a8f 55%, #113372 100%);
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 15% 55%, rgba(37,99,235,0.28) 0%, transparent 45%),
    radial-gradient(circle at 85% 15%, rgba(22,163,74,0.15) 0%, transparent 40%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.hero-inner {
  position: relative; z-index: 1;
  padding: 5.5rem 0 4.5rem;
  max-width: 780px;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: rgba(255,255,255,0.09);
  border: 1px solid rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.9);
  padding: 0.375rem 1rem;
  border-radius: 100px;
  font-size: 0.75rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  margin-bottom: 1.75rem;
}
.hero-badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%; background: var(--green);
  flex-shrink: 0;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 900;
  line-height: 1.07;
  letter-spacing: -0.03em;
  color: var(--white);
  margin-bottom: 1.375rem;
}
.hero h1 em { font-style: normal; color: #60a5fa; }

.hero .lead {
  color: rgba(255,255,255,0.78);
  max-width: 580px;
  margin-bottom: 2.5rem;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.875rem; margin-bottom: 3.25rem; }

.hero-trust {
  display: flex; flex-wrap: wrap; gap: 1.5rem;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.hero-trust-item {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.8125rem; font-weight: 500;
  color: rgba(255,255,255,0.65);
}
.hero-trust-item svg { color: rgba(255,255,255,0.45); flex-shrink: 0; }

/* ── Stats Bar ──────────────────────────────────────────────── */
.stats-bar {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 2.25rem 0;
}
.stats-bar-inner {
  display: flex; flex-wrap: wrap;
  justify-content: center; gap: 3.5rem;
}
.stat-item { text-align: center; }
.stat-value {
  font-size: 2.125rem; font-weight: 900;
  color: var(--navy); line-height: 1;
  letter-spacing: -0.035em;
}
.stat-value .accent { color: var(--blue-bright); }
.stat-label {
  font-size: 0.6875rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted); margin-top: 0.375rem;
}

/* ── Cards ──────────────────────────────────────────────────── */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--border);
  transition: background var(--transition);
}
.card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
  border-color: var(--blue-light);
}
.card:hover::before {
  background: var(--blue-bright);
}
.card-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.25rem; flex-shrink: 0;
}
.card-icon-blue   { background: var(--blue-pale);    color: var(--blue-bright); }
.card-icon-green  { background: var(--green-light);  color: var(--green); }
.card-icon-orange { background: var(--orange-light); color: var(--orange); }
.card h3 { margin-bottom: 0.625rem; color: var(--ink); }
.card p  { font-size: 0.9375rem; }

/* ── Steps ──────────────────────────────────────────────────── */
.steps-list { display: flex; flex-direction: column; gap: 0; }

.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  padding: 2.75rem 0;
  border-bottom: 1px solid var(--border);
}
.step:last-child { border-bottom: none; }

.step-left {
  display: flex; flex-direction: column;
  align-items: center;
  padding-top: 0.25rem;
}
.step-number {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--navy); color: var(--white);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.125rem; font-weight: 900;
  letter-spacing: -0.02em; flex-shrink: 0;
  box-shadow: 0 0 0 4px var(--blue-pale), 0 0 0 5px var(--blue-light);
}
.step-line {
  width: 2px; flex: 1;
  background: var(--border);
  margin-top: 0.5rem; min-height: 2rem;
}
.step:last-child .step-line { display: none; }

.step-content h3 {
  font-size: 1.375rem; font-weight: 700;
  color: var(--ink); margin-bottom: 0.75rem;
  letter-spacing: -0.015em;
}
.step-tag {
  display: inline-block;
  background: var(--blue-pale); color: var(--blue-bright);
  font-size: 0.6875rem; font-weight: 800;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 0.25rem 0.625rem;
  border-radius: 100px; margin-bottom: 0.875rem;
}

/* ── Partners Bar ───────────────────────────────────────────── */
.partners-bar {
  background: var(--surface);
  padding: 2.25rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.partners-bar-inner {
  display: flex; align-items: center;
  gap: 1.5rem; flex-wrap: wrap;
  justify-content: center;
}
.partners-label {
  font-size: 0.6875rem; font-weight: 800;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--muted);
}
.partner-item {
  font-size: 0.875rem; font-weight: 600;
  color: var(--ink-light);
  padding: 0.5rem 1.125rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

/* ── Impact Section ─────────────────────────────────────────── */
.impact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem; align-items: center;
}
.impact-content h2   { margin-bottom: 1rem; }
.impact-content .lead { margin-bottom: 1.75rem; }

.impact-items { display: flex; flex-direction: column; gap: 1rem; }
.impact-item  { display: flex; align-items: flex-start; gap: 0.875rem; }
.impact-item-icon {
  width: 32px; height: 32px; border-radius: 8px;
  background: var(--green-light); color: var(--green);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; margin-top: 0.125rem;
}
.impact-item-text strong { display: block; font-weight: 600; color: var(--ink); margin-bottom: 0.1rem; }
.impact-item-text span   { font-size: 0.875rem; color: var(--muted); }

.impact-visual {
  background: linear-gradient(145deg, #0b2347 0%, #1a4a8f 100%);
  border-radius: var(--radius);
  padding: 2.75rem 2.5rem;
  color: var(--white);
  position: relative; overflow: hidden;
}
.impact-visual::before {
  content: '';
  position: absolute; top: -30%; right: -15%;
  width: 280px; height: 280px;
  border-radius: 50%;
  background: rgba(37,99,235,0.18);
}
.impact-stat-big {
  font-size: 4.5rem; font-weight: 900;
  line-height: 1; letter-spacing: -0.045em;
  margin-bottom: 0.25rem;
}
.impact-stat-big .small-txt { font-size: 2rem; font-weight: 700; letter-spacing: -0.03em; }
.impact-stat-label {
  font-size: 0.875rem; color: rgba(255,255,255,0.65);
  margin-bottom: 2.25rem; padding-bottom: 2.25rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.impact-stat-row { display: flex; gap: 2rem; margin-top: 0; }
.impact-mini-stat .val {
  font-size: 1.75rem; font-weight: 900;
  line-height: 1; letter-spacing: -0.03em;
}
.impact-mini-stat .lbl {
  font-size: 0.75rem; color: rgba(255,255,255,0.6);
  margin-top: 0.25rem; font-weight: 500;
}

/* ── CTA Section ────────────────────────────────────────────── */
.cta-section {
  background: linear-gradient(155deg, #0b2347 0%, #1a4a8f 100%);
  color: var(--white);
  position: relative; overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
}
.cta-inner {
  position: relative; z-index: 1;
  text-align: center;
  padding: 5rem 0;
  max-width: 640px;
  margin: 0 auto;
}
.cta-inner .eyebrow  { color: rgba(255,255,255,0.5); display: block; margin-bottom: 1rem; }
.cta-inner h2        { color: var(--white); margin-bottom: 1rem; }
.cta-inner p         { color: rgba(255,255,255,0.7); margin-bottom: 2.25rem; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; }

/* ── Track Cards (Get Involved) ─────────────────────────────── */
.track-card {
  border-radius: var(--radius);
  padding: 2.75rem 2.5rem;
  position: relative; overflow: hidden;
}
.track-card-blue   { background: var(--navy); }
.track-card-green  { background: var(--green); }
.track-card h2     { color: var(--white); margin-bottom: 1rem; font-size: 1.625rem; }
.track-card p      { color: rgba(255,255,255,0.78); margin-bottom: 1.5rem; }
.track-card-bg-num {
  position: absolute; top: -1.5rem; right: 1.25rem;
  font-size: 10rem; font-weight: 900; line-height: 1;
  color: rgba(255,255,255,0.05);
  letter-spacing: -0.04em; pointer-events: none; user-select: none;
}
.track-list { display: flex; flex-direction: column; gap: 0.625rem; margin-bottom: 2rem; }
.track-list li {
  font-size: 0.9375rem; color: rgba(255,255,255,0.78);
  display: flex; align-items: flex-start; gap: 0.625rem;
}
.track-list li::before {
  content: '✓'; flex-shrink: 0; font-weight: 700; margin-top: 0.1rem;
}

/* ── About Page ─────────────────────────────────────────────── */
.founder-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
}
.founder-photo {
  width: 96px; height: 96px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1a4a8f 0%, #0ea5e9 100%);
  border: 3px solid var(--blue-light);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.25rem;
  flex-shrink: 0;
  box-shadow: 0 0 0 4px var(--blue-pale), 0 4px 16px rgba(14,165,233,0.25);
}
.paradox-quote {
  border-left: 4px solid var(--blue-bright);
  padding: 1.5rem 1.75rem;
  background: var(--blue-pale);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 2rem 0;
  position: relative;
}
.paradox-quote::before {
  content: '\201C';
  position: absolute;
  top: -0.25rem; left: 1rem;
  font-size: 4rem;
  font-weight: 900;
  line-height: 1;
  color: var(--blue-bright);
  opacity: 0.2;
  pointer-events: none;
}
.paradox-quote p {
  font-size: 1.125rem; font-style: italic;
  color: var(--navy); font-weight: 500; margin: 0;
  line-height: 1.7;
}

/* ── Forms ──────────────────────────────────────────────────── */
.form-wrapper { max-width: 700px; margin: 0 auto; }
.form-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 2.75rem;
  box-shadow: var(--shadow);
}

.form-group  { margin-bottom: 1.25rem; }
.form-row    { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }

label {
  display: block;
  font-size: 0.875rem; font-weight: 600;
  color: var(--ink); margin-bottom: 0.375rem;
}
label .optional { font-weight: 400; color: var(--muted); font-size: 0.8125rem; }

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 0.6875rem 0.9375rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem; font-family: var(--font);
  color: var(--ink); background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  -webkit-appearance: none; appearance: none;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--blue-bright);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}
input.error, select.error, textarea.error {
  border-color: #dc2626;
  box-shadow: 0 0 0 3px rgba(220,38,38,0.08);
}
textarea { resize: vertical; min-height: 120px; }
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.25rem;
  cursor: pointer;
}

.field-error {
  display: none;
  font-size: 0.8125rem; color: #dc2626;
  margin-top: 0.375rem;
}
.field-error.visible { display: block; }

.form-note {
  font-size: 0.8125rem; color: var(--muted);
  margin-top: 1rem; text-align: center; line-height: 1.6;
}

.form-success {
  display: none;
  background: var(--green-light);
  border: 1px solid #bbf7d0;
  border-radius: var(--radius);
  padding: 2rem 2.5rem;
  text-align: center;
}
.form-success.visible { display: block; }
.form-success-icon {
  font-size: 2.5rem; margin-bottom: 0.875rem; line-height: 1;
}
.form-success h3 { color: #15803d; margin-bottom: 0.5rem; }
.form-success p  { color: #166534; font-size: 0.9375rem; margin: 0; }

/* ── Highlight/Info Boxes ───────────────────────────────────── */
.info-box {
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.5rem 1.75rem;
  border-left: 4px solid transparent;
}
.info-box-blue {
  background: var(--blue-pale);
  border-left-color: var(--blue-bright);
}
.info-box-green {
  background: var(--green-light);
  border-left-color: var(--green);
}
.info-box h3 { color: var(--navy); margin-bottom: 0.375rem; font-size: 0.9375rem; }
.info-box p  { font-size: 0.9rem; margin: 0; }

/* ── Footer ─────────────────────────────────────────────────── */
.footer {
  background: var(--ink);
  color: rgba(255,255,255,0.75);
  padding: 3.5rem 0 2rem;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}
.footer-brand .nav-logo-abbr { color: var(--white); }
.footer-brand .nav-logo-full { color: rgba(255,255,255,0.45); }
.footer-brand .nav-logo-mark { background: var(--blue-bright); }
.footer-tagline {
  font-size: 0.875rem; color: rgba(255,255,255,0.5);
  margin-top: 0.875rem; line-height: 1.65;
  max-width: 240px;
}
.footer-col h4 {
  color: var(--white);
  font-size: 0.6875rem; font-weight: 800;
  letter-spacing: 0.12em; text-transform: uppercase;
  margin-bottom: 1rem;
}
.footer-links { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-links a {
  font-size: 0.875rem; color: rgba(255,255,255,0.5);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--white); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 1.5rem;
  display: flex; justify-content: space-between;
  align-items: center; flex-wrap: wrap; gap: 0.75rem;
}
.footer-copy  { font-size: 0.8125rem; color: rgba(255,255,255,0.38); }
.footer-legal { font-size: 0.75rem;   color: rgba(255,255,255,0.32); }

/* ── Placeholder Indicator ──────────────────────────────────── */
.ph-note {
  display: inline-block;
  background: #fef9c3;
  border: 1.5px dashed #ca8a04;
  border-radius: var(--radius-sm);
  padding: 0.3125rem 0.75rem;
  font-size: 0.8125rem; font-weight: 600;
  color: #854d0e;
  margin-bottom: 0.75rem;
}

/* ── Button icon nudge on hover ─────────────────────────────── */
.btn svg {
  transition: transform var(--transition);
}
.btn:hover svg {
  transform: translateX(2px);
}

/* ── Scroll Animations ──────────────────────────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.in-view { opacity: 1; transform: none; }
.fade-up:nth-child(2) { transition-delay: 0.08s; }
.fade-up:nth-child(3) { transition-delay: 0.16s; }
.fade-up:nth-child(4) { transition-delay: 0.24s; }
.fade-up:nth-child(5) { transition-delay: 0.32s; }

/* ── Utilities ──────────────────────────────────────────────── */
.text-center { text-align: center; }
.bg-surface  { background: var(--surface); }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section  { padding: 3.5rem 0; }
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
  .hero-inner { padding: 3.5rem 0 3rem; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .impact-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .stats-bar-inner { gap: 2rem; }
  .form-row { grid-template-columns: 1fr; }
  .form-card { padding: 1.75rem; }
  .cta-actions { flex-direction: column; align-items: center; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 480px) {
  .footer-inner { grid-template-columns: 1fr; }
  .track-card { padding: 2rem 1.5rem; }
  .hero-trust { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
}

/* ── Dark Mode Toggle Button ────────────────────────────────── */
.nav-theme-toggle {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: transparent;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--muted);
  transition: all var(--transition);
  flex-shrink: 0;
  margin-left: 0.375rem;
}
.nav-theme-toggle:hover {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--blue-light);
}
.nav-theme-toggle .icon-sun  { display: none; }
.nav-theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .nav-theme-toggle .icon-sun  { display: block; }
[data-theme="dark"] .nav-theme-toggle .icon-moon { display: none; }

/* ── Dark Mode Variables ────────────────────────────────────── */
/*
   IMPORTANT: --white and --navy are intentionally NOT changed here.
   They're used as text/accent colors on the always-dark sections
   (hero, page-header, CTA, impact-visual, footer). Changing them
   would make all that text invisible. Page backgrounds are set via
   explicit body/component overrides below instead.
*/
[data-theme="dark"] {
  --blue-bright: #3b82f6;
  --blue-light:  #2d4f8a;
  --blue-pale:   #1a2f52;
  --green:       #22c55e;
  --green-light: #14312a;
  --orange:      #fb923c;
  --orange-light:#3b1a0a;

  --ink:         #f1f5f9;
  --ink-light:   #cbd5e1;
  --muted:       #94a3b8;
  --border:      #2a3a4e;
  --surface:     #131f30;
}

/* ── Dark Mode: Explicit background & contrast overrides ────── */

/* Page background */
[data-theme="dark"] body { background-color: #0c1623; color: var(--ink); }

/* Nav */
[data-theme="dark"] .nav {
  background: rgba(12, 22, 35, 0.97);
  border-bottom-color: var(--border);
}
[data-theme="dark"] .nav-logo-abbr      { color: var(--ink); }
[data-theme="dark"] .nav-logo-full      { color: var(--muted); }
[data-theme="dark"] .nav-hamburger span { background: var(--ink); }

/* Stat values: --navy on dark surface = near-invisible; use --ink */
[data-theme="dark"] .stat-value         { color: var(--ink); }

/* Stats / partners bars */
[data-theme="dark"] .stats-bar     { background-color: var(--surface); border-bottom-color: var(--border); }
[data-theme="dark"] .partners-bar  { background-color: #0c1623; border-color: var(--border); }
[data-theme="dark"] .partner-item  { background-color: var(--surface); border-color: var(--border); color: var(--ink-light); }

/* Cards */
[data-theme="dark"] .card          { background-color: var(--surface); border-color: var(--border); }
[data-theme="dark"] .card:hover    { border-color: var(--blue-light); }

/* Info boxes */
[data-theme="dark"] .info-box-blue  { background: var(--blue-pale); }
[data-theme="dark"] .info-box-green { background: var(--green-light); }
[data-theme="dark"] .info-box h3    { color: var(--ink); }
[data-theme="dark"] .info-box p     { color: var(--ink-light); }

/* Paradox quote */
[data-theme="dark"] .paradox-quote   { background: var(--blue-pale); border-left-color: var(--blue-bright); }
[data-theme="dark"] .paradox-quote p { color: var(--ink); }

/* Founder card */
[data-theme="dark"] .founder-card  { background-color: var(--surface); border-color: var(--border); }
[data-theme="dark"] .founder-photo { background: var(--blue-pale); border-color: var(--blue-light); color: var(--blue-bright); }

/* Section headings that might inherit stale colors */
[data-theme="dark"] .section-header h2,
[data-theme="dark"] .impact-content h2,
[data-theme="dark"] h1:not(.hero h1):not(.page-header h1) { color: var(--ink); }

/* Forms */
[data-theme="dark"] .form-card     { background-color: var(--surface); border-color: var(--border); }
[data-theme="dark"] input[type="text"],
[data-theme="dark"] input[type="email"],
[data-theme="dark"] input[type="tel"],
[data-theme="dark"] input[type="number"],
[data-theme="dark"] select,
[data-theme="dark"] textarea {
  background-color: #0f1c2d;
  border-color: var(--border);
  color: var(--ink);
  color-scheme: dark;
}
[data-theme="dark"] input:focus,
[data-theme="dark"] select:focus,
[data-theme="dark"] textarea:focus {
  border-color: var(--blue-bright);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.18);
}
[data-theme="dark"] select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
}

/* Footer: base uses background: var(--ink), which flips to light in dark mode.
   Override to a fixed dark value. */
[data-theme="dark"] .footer            { background-color: #060f1a; }
[data-theme="dark"] .footer-copy       { color: rgba(255,255,255,0.35); }
[data-theme="dark"] .footer-legal      { color: rgba(255,255,255,0.28); }

/* Placeholder indicator */
[data-theme="dark"] .ph-note { background: #2d2000; border-color: #a16207; color: #fbbf24; }

/* Form success */
[data-theme="dark"] .form-success      { background: var(--green-light); border-color: #166534; }
[data-theme="dark"] .form-success h3   { color: var(--green); }
[data-theme="dark"] .form-success p    { color: #86efac; }

/* FAQ items on get-involved page */
[data-theme="dark"] .faq-item          { border-bottom-color: var(--border); }
[data-theme="dark"] .faq-q             { color: var(--ink); }

/* Smooth theme transitions */
body, .nav, .card, .form-card, .info-box, .founder-card,
.stats-bar, .partners-bar, .partner-item, .paradox-quote,
.footer, input, select, textarea, label, h1, h2, h3, h4 {
  transition:
    background-color 0.25s ease,
    border-color     0.25s ease,
    color            0.25s ease,
    box-shadow       0.25s ease;
}

/* ── System preference fallback (no JS) ─────────────────────── */
@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --blue-bright: #3b82f6;
    --blue-light:  #2d4f8a;
    --blue-pale:   #1a2f52;
    --green:       #22c55e;
    --green-light: #14312a;
    --orange:      #fb923c;
    --orange-light:#3b1a0a;
    --ink:         #f1f5f9;
    --ink-light:   #cbd5e1;
    --muted:       #94a3b8;
    --border:      #2a3a4e;
    --surface:     #131f30;
  }
  html:not([data-theme="light"]) body         { background-color: #0c1623; color: #f1f5f9; }
  html:not([data-theme="light"]) .nav         { background: rgba(12,22,35,0.97); border-bottom-color: #2a3a4e; }
  html:not([data-theme="light"]) .nav-logo-abbr { color: #f1f5f9; }
  html:not([data-theme="light"]) .stat-value  { color: #f1f5f9; }
  html:not([data-theme="light"]) .stats-bar   { background-color: #131f30; }
  html:not([data-theme="light"]) .partners-bar{ background-color: #0c1623; }
  html:not([data-theme="light"]) .partner-item{ background-color: #131f30; border-color: #2a3a4e; }
  html:not([data-theme="light"]) .card        { background-color: #131f30; border-color: #2a3a4e; }
  html:not([data-theme="light"]) .form-card   { background-color: #131f30; border-color: #2a3a4e; }
  html:not([data-theme="light"]) input,
  html:not([data-theme="light"]) select,
  html:not([data-theme="light"]) textarea     { background-color: #0f1c2d; border-color: #2a3a4e; color: #f1f5f9; color-scheme: dark; }
  html:not([data-theme="light"]) .footer      { background-color: #060f1a; }
  html:not([data-theme="light"]) .info-box-blue  { background: #1a2f52; }
  html:not([data-theme="light"]) .info-box-green { background: #14312a; }
}