/* ============================
   Founders Basketball - Modern UI
   Author: Cline
   ============================ */

/* 1) Base Reset & Variables */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
:root {
  --primary: #16a34a;       /* Green - brand */
  --primary-600: #15803d;
  --accent: #f97316;        /* Basketball orange */
  --accent-600: #ea580c;
  --bg: #ffffff;
  --surface: #f8fafc;       /* Light surface */
  --text: #0f172a;          /* Slate-900 */
  --muted: #475569;         /* Slate-600 */
  --ring: rgba(22,163,74,.35);
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(2,6,23,.06);
  --shadow-md: 0 6px 24px rgba(2,6,23,.08);
  --shadow-lg: 0 12px 36px rgba(2,6,23,.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --surface: #0f172a;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --ring: rgba(125,211,252,.3);
  }
}

html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

/* 2) Utilities */
.container {
  width: 100%;
  max-width: 1140px;
  margin-inline: auto;
  padding-inline: 1.25rem;
}
.section {
  padding-block: clamp(48px, 7vw, 96px);
}
.section-header {
  text-align: center;
  margin-bottom: clamp(24px, 4vw, 48px);
}
.section-eyebrow {
  display: inline-block;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--primary) 28%, transparent);
  padding: .35rem .6rem;
  border-radius: 999px;
  margin-bottom: .75rem;
}
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5rem; }
h2 { font-size: clamp(1.5rem, 1.4rem + 1.2vw, 2.25rem); }
p.lead { color: var(--muted); font-size: clamp(1rem, .96rem + .4vw, 1.125rem); max-width: 65ch; margin-inline: auto; }

/* 3) Header / Nav */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(1.1) blur(10px);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--text) 10%, transparent);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: .85rem;
  gap: .5rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-weight: 800;
  letter-spacing: .2px;
}
.brand-mark {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  color: white;
  border-radius: 10px;
  background:
    radial-gradient(80% 80% at 30% 30%, color-mix(in srgb, var(--accent) 80%, var(--primary) 20%), transparent 65%),
    linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: var(--shadow-sm), inset 0 -6px 18px rgba(0,0,0,.12);
}
.brand span { font-size: 1.05rem; }
.nav-links {
  display: none;
  gap: 1rem;
}
.nav-links a {
  color: var(--muted);
  padding: .5rem .75rem;
  border-radius: 8px;
}
.nav-links a:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--text) 8%, transparent);
}
.nav-cta {
  display: none;
  gap: .6rem;
}
.nav-toggle {
  display: grid; place-items: center;
  width: 40px; height: 40px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--text) 6%, transparent);
  border: 1px solid color-mix(in srgb, var(--text) 14%, transparent);
}
.nav-toggle span, .nav-toggle::before, .nav-toggle::after {
  content: "";
  width: 18px; height: 2px; border-radius: 2px;
  background: var(--text);
  display: block;
}
.nav-toggle::before { transform: translateY(-5px); }
.nav-toggle::after { transform: translateY(5px); }

@media (min-width: 900px) {
  .nav-links { display: flex; }
  .nav-cta { display: flex; }
  .nav-toggle { display: none; }
}

/* 4) Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .7rem 1rem;
  border-radius: 10px;
  border: 1px solid transparent;
  font-weight: 600;
  letter-spacing: .2px;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
  cursor: pointer;
}
.btn:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
}
.btn-primary {
  color: white;
  background: linear-gradient(135deg, var(--primary), color-mix(in srgb, var(--primary) 75%, var(--accent) 25%));
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline {
  color: var(--text);
  background: transparent;
  border-color: color-mix(in srgb, var(--text) 18%, transparent);
}
.btn-outline:hover {
  background: color-mix(in srgb, var(--text) 8%, transparent);
}

/* 5) Mobile Drawer */
.drawer {
  display: none;
  border-bottom: 1px solid color-mix(in srgb, var(--text) 10%, transparent);
  background: var(--bg);
}
.drawer.open { display: block; }
.drawer a {
  display: block;
  padding: .9rem 1.25rem;
  color: var(--muted);
}
.drawer a + a { border-top: 1px solid color-mix(in srgb, var(--text) 8%, transparent); }

/* 6) Hero */
.hero {
  position: relative;
  overflow: clip;
  background:
    radial-gradient(60% 60% at 85% -10%, color-mix(in srgb, var(--accent) 14%, transparent) 0%, transparent 60%),
    radial-gradient(70% 70% at -5% 10%, color-mix(in srgb, var(--primary) 18%, transparent) 0%, transparent 60%),
    linear-gradient(180deg, color-mix(in srgb, var(--surface) 90%, var(--bg) 10%), var(--bg));
}
.hero-inner {
  display: grid;
  align-items: center;
  gap: 28px;
  padding-block: clamp(48px, 6vw, 96px);
}
@media (min-width: 900px) {
  .hero-inner { grid-template-columns: 1.25fr .75fr; gap: 48px; }
}
.hero h1 {
  font-size: clamp(2rem, 1.4rem + 2.4vw, 3.25rem);
  letter-spacing: -.02em;
}
.hero p {
  color: var(--muted);
  font-size: clamp(1rem, .96rem + .4vw, 1.125rem);
  margin: .75rem 0 1.25rem;
}
.hero-cta { display: flex; gap: .6rem; flex-wrap: wrap; }
.hero-art {
  min-height: 260px;
  border-radius: calc(var(--radius) + 10px);
  background:
    conic-gradient(from 210deg at 50% 50%, color-mix(in srgb, var(--primary) 28%, transparent), color-mix(in srgb, var(--accent) 28%, transparent), transparent 60%),
    radial-gradient(80% 80% at 50% 50%, color-mix(in srgb, var(--text) 4%, transparent), transparent 70%);
  border: 1px solid color-mix(in srgb, var(--text) 10%, transparent);
  box-shadow: var(--shadow-lg);
  position: relative;
  isolation: isolate;
}
.hero-ball {
  --s: 150px;
  position: absolute; inset: auto 20px -30px auto;
  width: var(--s); height: var(--s);
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, rgba(255,255,255,.5), transparent 45%),
    radial-gradient(circle at 60% 70%, rgba(0,0,0,.18), transparent 48%),
    linear-gradient(135deg, #ff8a1f, #ff6a00);
  border: 10px solid color-mix(in srgb, var(--accent) 70%, #000 0%);
  box-shadow: 0 14px 40px rgba(0,0,0,.25);
  opacity: .9;
}
.hero-ball::before, .hero-ball::after {
  content: "";
  position: absolute; inset: 0;
  border-radius: 50%;
  border: 3px solid rgba(0,0,0,.25);
  mask:
    radial-gradient(circle at 50% 50%, transparent 62%, #000 62.5%) subtract,
    radial-gradient(circle at 50% 50%, transparent 30%, #000 30.5%);
}
.hero-ball::after {
  transform: rotate(90deg);
}

/* 7) KPI / Impact */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
@media (min-width: 700px) { .kpi-grid { grid-template-columns: repeat(4, 1fr); } }
.kpi {
  background: var(--surface);
  border: 1px solid color-mix(in srgb, var(--text) 10%, transparent);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.kpi h3 {
  font-size: clamp(1.5rem, 1.2rem + 1.4vw, 2.25rem);
  margin-bottom: .15rem;
  color: var(--primary-600);
}
.kpi p { color: var(--muted); margin: 0; }

/* 8) Cards (Programs) */
.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
@media (min-width: 720px) { .grid { grid-template-columns: repeat(3, 1fr); } }

.card {
  background: var(--bg);
  border: 1px solid color-mix(in srgb, var(--text) 10%, transparent);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow-sm);
  transition: transform .18s ease, box-shadow .18s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.card .tag {
  display: inline-block;
  font-size: .75rem;
  color: var(--primary-600);
  background: color-mix(in srgb, var(--primary) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--primary) 24%, transparent);
  padding: .25rem .5rem;
  border-radius: 999px;
  margin-bottom: .5rem;
}
.card h3 { margin: .1rem 0 .25rem; font-size: 1.125rem; }
.card p { color: var(--muted); margin: 0 0 .75rem; }

/* 9) Sponsors */
.logo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
@media (min-width: 700px) { .logo-grid { grid-template-columns: repeat(4, 1fr); } }
.logo-tile {
  display: grid; place-items: center;
  height: 72px;
  background: var(--surface);
  border: 1px dashed color-mix(in srgb, var(--text) 18%, transparent);
  border-radius: 12px;
  color: var(--muted);
  font-weight: 600;
}

/* 10) Donate */
.donate {
  background:
    radial-gradient(70% 70% at 10% 0%, color-mix(in srgb, var(--primary) 10%, transparent) 0%, transparent 60%),
    var(--surface);
  border-top: 1px solid color-mix(in srgb, var(--text) 10%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--text) 10%, transparent);
}
.plan-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 720px) { .plan-grid { grid-template-columns: repeat(3, 1fr); } }
.plan {
  background: var(--bg);
  border: 1px solid color-mix(in srgb, var(--text) 10%, transparent);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow-sm);
}
.plan .price { font-size: 1.6rem; font-weight: 800; color: var(--primary-600); }
.plan .desc { color: var(--muted); margin: .25rem 0 .75rem; }
.badge {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .05em;
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent-600));
  border-radius: 999px;
  padding: .25rem .5rem;
  margin-bottom: .5rem;
}

/* 11) Contact */
.form {
  display: grid;
  gap: .75rem;
  max-width: 720px;
  margin-inline: auto;
}
.input, textarea, select {
  width: 100%;
  padding: .75rem .85rem;
  border-radius: 10px;
  border: 1px solid color-mix(in srgb, var(--text) 16%, transparent);
  background: var(--bg);
  color: var(--text);
  transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}
.input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--ring);
}
textarea { min-height: 120px; resize: vertical; }

/* 12) Footer */
.footer {
  background: linear-gradient(180deg, var(--surface), color-mix(in srgb, var(--surface) 60%, var(--bg) 40%));
  border-top: 1px solid color-mix(in srgb, var(--text) 10%, transparent);
  padding-block: 28px;
}
.footer-inner {
  display: grid;
  gap: 18px;
}
@media (min-width: 800px) {
  .footer-inner { grid-template-columns: 1.5fr 1fr 1fr; }
}
.footer a { color: var(--muted); }
.footer a:hover { color: var(--text); }

/* 13) Back to Top */
.back-to-top {
  position: fixed;
  right: 18px; bottom: 18px;
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), color-mix(in srgb, var(--primary) 75%, var(--accent) 25%));
  color: #fff;
  box-shadow: var(--shadow-md);
  border: 1px solid color-mix(in srgb, #000 8%, transparent);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: .2s ease;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* 14) Accessibility helpers */
.visually-hidden {
  position: absolute !important;
  height: 1px; width: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap;
}