/*
 * Shared styles for the landing page and the sponsor placeholder pages.
 * Carolina-blue theme, matching the registration page's visual language.
 * (register.html keeps its own large inline stylesheet.)
 */

:root {
  --carolina: #4B9CD3;
  --carolina-deep: #13294B;
  --carolina-light: #C4D8E2;
  --carolina-pale: #EDF4F9;
  --orange-accent: #F47B20;
  --ink: #0a1929;
  --white: #ffffff;
  --paper: #f8fbfd;
  --line: rgba(19, 41, 75, 0.15);
  --line-soft: rgba(19, 41, 75, 0.08);

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html, body {
  background: var(--paper);
  color: var(--ink);
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

body {
  background:
    radial-gradient(ellipse at 0% 0%, rgba(75, 156, 211, 0.18), transparent 50%),
    radial-gradient(ellipse at 100% 100%, rgba(244, 123, 32, 0.08), transparent 45%),
    linear-gradient(180deg, var(--carolina-pale) 0%, var(--paper) 100%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding: clamp(20px, 4vw, 50px) clamp(16px, 4vw, 40px);
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* ===== HEADER ===== */
header {
  text-align: center;
  padding: 20px 0 8px;
}

.logo-wrap {
  display: block;
  position: relative;
  width: fit-content;
  margin: 0 auto 20px;
}

.logo-wrap::before {
  content: "";
  position: absolute;
  inset: -8px;
  background: radial-gradient(circle, rgba(75, 156, 211, 0.25), transparent 70%);
  border-radius: 50%;
  z-index: 0;
}

.logo {
  width: clamp(150px, 26vw, 200px);
  height: auto;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 8px 24px rgba(19, 41, 75, 0.18));
}

.brand-eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--carolina);
  font-weight: 500;
}

/* ===== HERO (landing) ===== */
.hero {
  text-align: center;
  padding: 24px 0 12px;
}

.hero h1 {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800;
  font-size: clamp(44px, 8vw, 78px);
  line-height: 0.96;
  letter-spacing: -0.01em;
  color: var(--carolina-deep);
  text-transform: uppercase;
}

.hero h1 .accent { color: var(--orange-accent); }

.hero .date-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: clamp(12px, 1.6vw, 14px);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--carolina-deep);
  background: var(--white);
  border: 1.5px solid var(--carolina);
  padding: 8px 18px;
  border-radius: 100px;
  box-shadow: 0 6px 18px rgba(19, 41, 75, 0.06);
}

.hero .lede {
  max-width: 56ch;
  margin: 26px auto 0;
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.65;
  color: rgba(19, 41, 75, 0.72);
}

/* ===== CTA BUTTONS ===== */
.cta-row {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin: 38px auto 0;
}

/* Small "read the rules" note under the CTA buttons */
.cta-note {
  text-align: center;
  margin-top: 16px;
}
.cta-note a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(19, 41, 75, 0.65);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
  transition: color 160ms, border-color 160ms;
}
.cta-note a:hover { color: var(--orange-accent); border-color: var(--orange-accent); }
.cta-note .icon {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.btn {
  --btn-shadow: 0 10px 28px rgba(19, 41, 75, 0.16);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 248px;
  padding: 17px 30px;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: 12px;
  cursor: pointer;
  transition:
    transform var(--duration, 220ms) var(--ease-out-expo),
    box-shadow 220ms var(--ease-out-expo),
    background 180ms ease,
    color 180ms ease;
}

.btn-arrow { transition: transform 220ms var(--ease-out-expo); }
.btn:hover .btn-arrow { transform: translateX(4px); }

.btn-primary {
  background: linear-gradient(135deg, var(--carolina) 0%, #2f7fb8 100%);
  color: var(--white);
  box-shadow: var(--btn-shadow), 0 1px 2px rgba(19, 41, 75, 0.2);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 36px rgba(75, 156, 211, 0.4);
}

.btn-secondary {
  background: var(--white);
  color: var(--carolina-deep);
  border-color: var(--carolina);
  box-shadow: 0 6px 18px rgba(19, 41, 75, 0.07);
}

.btn-secondary:hover {
  transform: translateY(-3px);
  background: var(--carolina-pale);
  box-shadow: 0 14px 30px rgba(19, 41, 75, 0.12);
}

.btn:active { transform: translateY(-1px); }

.btn:focus-visible {
  outline: 3px solid var(--orange-accent);
  outline-offset: 3px;
}

/* ===== COMING SOON (placeholder pages) ===== */
.placeholder {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 0;
}

.placeholder .badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange-accent);
  margin-bottom: 14px;
}

.placeholder h1 {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800;
  font-size: clamp(40px, 7vw, 64px);
  line-height: 1;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--carolina-deep);
}

.placeholder p {
  max-width: 48ch;
  margin: 18px auto 0;
  font-size: clamp(15px, 1.8vw, 17px);
  color: rgba(19, 41, 75, 0.7);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 32px;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--carolina-deep);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}

.back-link:hover { color: var(--orange-accent); border-color: var(--orange-accent); }
.back-link:focus-visible { outline: 3px solid var(--orange-accent); outline-offset: 3px; }

/* ===== FOOTER ===== */
footer {
  text-align: center;
  padding: 36px 24px 28px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(19, 41, 75, 0.45);
}

footer a {
  color: rgba(19, 41, 75, 0.6);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color 160ms ease;
}

footer a:hover { color: var(--orange-accent); }

@media (max-width: 540px) {
  .btn { min-width: 100%; }
  .cta-row { gap: 12px; }
}