/* ============================================
   ZERO LIMITS — Tiny Challenges
   Shared stylesheet. All pages link this.
   Dark cinematic. Trust-first. No gold.
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Kumbh+Sans:wght@300;400;500;600;700&family=DM+Sans:ital,wght@0,300;0,400;0,500;1,300;1,400&display=swap');

:root {
  --bg:        #08080d;
  --bg2:       #0d0d14;
  --bg3:       #121219;
  --border:    rgba(255,255,255,0.07);
  --border-m:  rgba(255,255,255,0.12);
  --text:      #e8e8f0;
  --muted:     rgba(232,232,240,0.45);
  --dim:       rgba(232,232,240,0.25);
  --accent:    #c3d5db;
  --accent-b:  #ddeef3;
  --cta-bg:    #e6e6ec;
  --cta-txt:   #08080d;
  --sans:      'Kumbh Sans', sans-serif;
  --body:      'DM Sans', sans-serif;
  --max:       1220px;
  --pad:       clamp(1.5rem, 5vw, 4rem);
  --ease:      cubic-bezier(0.16,1,0.3,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { background: var(--bg); color: var(--text); font-family: var(--body); font-size: 16px; line-height: 1.7; overflow-x: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* grain overlay */
body::before {
  content: '';
  position: fixed; inset: 0; pointer-events: none; z-index: 9999;
  opacity: 0.028;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ── SHARED NAV ── */
.nav {
  position: sticky; top: 0; z-index: 100;
  padding: 1.1rem var(--pad);
  display: flex; justify-content: space-between; align-items: center;
  background: rgba(8,8,13,0.95); backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
}
.nav-brand { display: flex; align-items: center; gap: 1.25rem; }
.nav-wordmark { font-family: var(--sans); font-size: 0.92rem; font-weight: 700; letter-spacing: 0.06em; color: var(--text); }
.nav-wordmark span { color: var(--accent); }
.nav-sep { width: 1px; height: 20px; background: var(--border-m); }
.nav-sub { font-family: var(--sans); font-size: 0.58rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--dim); }
.nav-links { display: flex; align-items: center; gap: 1.75rem; }
.nav-links a { font-family: var(--sans); font-size: 0.76rem; font-weight: 500; color: var(--muted); letter-spacing: 0.04em; transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
  font-family: var(--sans) !important; font-size: 0.72rem !important; font-weight: 700 !important;
  letter-spacing: 0.12em !important; text-transform: uppercase !important;
  background: var(--cta-bg) !important; color: var(--cta-txt) !important;
  padding: 0.55rem 1.35rem !important; transition: background 0.2s !important;
}
.nav-cta:hover { background: #fff !important; }

/* ── TYPOGRAPHY ── */
h1,h2,h3,h4 { font-family: var(--sans); color: var(--text); font-weight: 700; line-height: 1.1; letter-spacing: -0.025em; }
h1 { font-size: clamp(2.4rem,5vw,4rem); }
h2 { font-size: clamp(1.8rem,3.5vw,2.8rem); }
h3 { font-size: clamp(1.2rem,2.5vw,1.6rem); }
h2 em, h1 em { font-style: italic; color: var(--accent-b); font-family: var(--body); font-weight: 300; }
p { margin-bottom: 1em; }
p:last-child { margin-bottom: 0; }

/* ── LAYOUT ── */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }
.section { max-width: var(--max); margin: 0 auto; padding: clamp(4rem,8vw,8rem) var(--pad); }
.eyebrow {
  font-family: var(--sans); font-size: 0.6rem; letter-spacing: 0.28em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 1.25rem;
  display: flex; align-items: center; gap: 0.75rem;
}
.eyebrow::before { content: ''; width: 26px; height: 1px; background: var(--accent); }

/* ── FORMS ── */
.field { margin-bottom: 1.1rem; }
.field label {
  display: block; font-family: var(--sans); font-size: 0.62rem;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--dim);
  margin-bottom: 0.5rem;
}
.field input, .field select, .field textarea {
  width: 100%; background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-m); color: var(--text);
  padding: 0.9rem 1rem; font-family: var(--body); font-size: 0.9rem;
  outline: none; transition: border-color 0.2s;
  -webkit-appearance: none; border-radius: 0;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--accent); }
.field input::placeholder, .field textarea::placeholder { color: var(--dim); }
.field select { cursor: pointer; }
.field select option { background: #0d0d14; }
.field textarea { min-height: 100px; resize: vertical; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* ── BUTTONS ── */
.btn-primary {
  display: inline-block; background: var(--cta-bg); color: var(--cta-txt);
  padding: 1rem 2.5rem; font-family: var(--sans); font-size: 0.8rem;
  font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase;
  transition: all 0.2s; cursor: pointer; border: none;
}
.btn-primary:hover { background: #fff; transform: translateY(-1px); }
.btn-full {
  display: block; width: 100%; background: var(--cta-bg); color: var(--cta-txt);
  padding: 1.1rem; font-family: var(--sans); font-size: 0.82rem;
  font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase;
  text-align: center; transition: all 0.2s; cursor: pointer; border: none;
}
.btn-full:hover { background: #fff; transform: translateY(-1px); }
.btn-submit { width: 100%; }

/* ── ALERTS ── */
.alert { padding: 1rem 1.25rem; margin-bottom: 1.5rem; font-size: 0.85rem; border-left: 3px solid; font-family: var(--body); }
.alert-error { background: rgba(220,60,60,0.08); border-color: #c03; color: #ffaaaa; }
.alert-error a { color: #ffaaaa; }
.alert-success { background: rgba(100,200,100,0.08); border-color: #4a4; color: #aaffaa; }

/* ── CARDS ── */
.card {
  background: var(--bg2); border: 1px solid var(--border-m);
  padding: 2.5rem; position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 2px; background: var(--accent);
}

/* ── COHORT BADGE ── */
.cohort-pill {
  display: inline-flex; align-items: center; gap: 0.6rem;
  background: rgba(195,213,219,0.06); border: 1px solid rgba(195,213,219,0.18);
  padding: 0.5rem 1rem; margin-bottom: 2rem;
}
.cohort-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: pulse 1.6s infinite; }
@keyframes pulse { 0%,100%{opacity:1}50%{opacity:0.2} }
.cohort-text { font-family: var(--sans); font-size: 0.62rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); }

/* ── FOOTER ── */
.site-footer {
  border-top: 1px solid var(--border); background: var(--bg2);
  padding: 2.5rem var(--pad);
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 1rem;
}
.footer-brand { font-family: var(--sans); font-size: 0.85rem; font-weight: 700; letter-spacing: 0.06em; }
.footer-brand span { color: var(--accent); }
.footer-copy { font-size: 0.7rem; color: var(--dim); font-family: var(--sans); }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { font-family: var(--sans); font-size: 0.7rem; color: var(--dim); transition: color 0.2s; }
.footer-links a:hover { color: var(--text); }

/* ── RESPONSIVE ── */
@media(max-width:768px) {
  .field-row { grid-template-columns: 1fr; }
  .nav-links a:not(.nav-cta) { display: none; }
  .nav-sub, .nav-sep { display: none; }
}