:root {
  --teal-dark: #031b1c;
  --teal-dark-2: #06282a;
  --panel: #0a2f2f;
  --green-neon: #00ff8b;
  --green-deep: #03634d;
  --green-mint: #2cc198;
  --teal-blue: #1ec6c1;
  --white: #ffffff;
  --ink-muted: #9fb8b6;
}

* { -webkit-font-smoothing: antialiased; }

body {
  background: var(--teal-dark);
  color: var(--white);
  font-family: "Visby CF", "Segoe UI", Arial, sans-serif;
  overflow-x: hidden;
}

h1, h2, h3, h4, .font-heavy { font-family: "Visby CF", "Segoe UI", Arial, sans-serif; font-weight: 800; }

.font-tagline { letter-spacing: 0.28em; }

/* ---------- Gradient + line-pattern signature (brand guide p.12-13) ---------- */
.brand-gradient {
  background: radial-gradient(120% 140% at 15% 0%, #0a4a3d 0%, #062b2c 45%, #031b1c 100%);
}

.brand-gradient::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    115deg,
    rgba(0, 255, 139, 0.07) 0px,
    rgba(0, 255, 139, 0.07) 1px,
    transparent 1px,
    transparent 64px
  );
  pointer-events: none;
}

.line-pattern-soft {
  background-image: repeating-linear-gradient(
    115deg,
    rgba(0, 255, 139, 0.05) 0px,
    rgba(0, 255, 139, 0.05) 1px,
    transparent 1px,
    transparent 48px
  );
}

/* ---------- Ambient ombre shapes (brand guide p.14) ---------- */
.ambient-blob {
  position: absolute;
  border-radius: 9999px;
  filter: blur(70px);
  opacity: 0.35;
  pointer-events: none;
}

/* ---------- Glass panel ---------- */
.glass-panel {
  background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02));
  border: 1px solid rgba(0, 255, 139, 0.12);
  backdrop-filter: blur(6px);
}

/* ---------- Nav ---------- */
#site-nav.scrolled {
  background: rgba(3, 27, 28, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0,255,139,0.12);
}

/* ---------- Buttons ---------- */
.btn-primary {
  background: var(--green-neon);
  color: var(--teal-dark);
  box-shadow: 0 0 0 0 rgba(0,255,139,0.5);
  transition: transform 0.2s ease, box-shadow 0.3s ease, background 0.3s ease;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px -5px rgba(0,255,139,0.45);
}

.btn-ghost {
  border: 1px solid rgba(255,255,255,0.25);
  transition: border-color 0.2s ease, background 0.2s ease;
}
.btn-ghost:hover {
  border-color: var(--green-neon);
  background: rgba(0,255,139,0.06);
}

/* ---------- Cards ---------- */
.feature-card, .speaker-card, .agenda-card {
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.feature-card:hover, .speaker-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,255,139,0.35);
  box-shadow: 0 20px 40px -20px rgba(0,255,139,0.25);
}

[data-day-tab] {
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
[data-day-tab].is-active {
  background: var(--green-neon);
  color: var(--teal-dark);
  border-color: var(--green-neon);
}

.pill {
  border: 1px solid rgba(0,255,139,0.35);
  color: var(--green-neon);
  background: rgba(0,255,139,0.06);
}

/* ---------- Speaker avatar placeholder ---------- */
.avatar-mark {
  background: linear-gradient(135deg, var(--green-deep), var(--teal-blue));
}

/* ---------- Gradient text ---------- */
.text-gradient {
  background: linear-gradient(90deg, var(--green-neon), var(--teal-blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Scroll fade-in ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-up.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Countdown ---------- */
.count-box {
  background: rgba(0,255,139,0.05);
  border: 1px solid rgba(0,255,139,0.2);
}

/* ---------- Marquee (partners) ---------- */
.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee 28s linear infinite;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--teal-dark); }
::-webkit-scrollbar-thumb { background: var(--green-deep); border-radius: 6px; }

/* ---------- Utility ---------- */
.section-kicker {
  color: var(--green-neon);
  letter-spacing: 0.22em;
  font-weight: 700;
}

@media (max-width: 640px) {
  .hide-mobile { display: none; }
}