/* ===== Tokens ===== */
:root{
  --bg: #030402;
  --bg-panel: rgba(14,20,15,0.55);
  --bg-panel-solid: #0a0f0a;
  --line: rgba(70,255,150,0.14);
  --line-strong: rgba(70,255,150,0.32);
  --ink: #e9f3ec;
  --ink-dim: #8a9990;
  --green: #39ff9e;
  --green-soft: #1fae6b;
  --green-deep: #0a3d24;
  --amber: #ffd166;
  --font-display: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius: 10px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-display);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a{ color: inherit; text-decoration: none; }
ul{ list-style: none; margin:0; padding:0; }
button{ font-family: inherit; cursor:pointer; }

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

/* ===== Ambient layers ===== */
#fieldCanvas{
  position: fixed; inset:0; z-index:0; pointer-events:none;
  width: 100%; height: 100%;
}
body::before{
  /* diagonal dark-green streaks */
  content:''; position: fixed; inset: -10%; z-index: 0; pointer-events:none;
  background:
    linear-gradient(115deg, transparent 30%, rgba(57,255,158,0.05) 42%, transparent 54%),
    linear-gradient(115deg, transparent 60%, rgba(31,174,107,0.07) 70%, transparent 82%);
  animation: streak-drift 22s ease-in-out infinite alternate;
}
@keyframes streak-drift{
  0%{ transform: translate(0,0); }
  100%{ transform: translate(-3%, 2%); }
}
.scanlines{
  position: fixed; inset:0; z-index: 50; pointer-events:none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255,255,255,0.012) 0px,
    rgba(255,255,255,0.012) 1px,
    transparent 1px,
    transparent 3px
  );
  mix-blend-mode: overlay;
}
.progress-bar{
  position: fixed; top:0; left:0; height: 2px; width: 0%; z-index: 60;
  background: linear-gradient(90deg, var(--green), var(--green-soft));
  box-shadow: 0 0 12px rgba(57,255,158,0.6);
  transition: width 0.1s linear;
}

/* ===== Nav ===== */
#navbar{
  position: fixed; top:0; left:0; right:0; z-index: 40;
  padding: 14px 24px;
}
.nav-inner{
  max-width: 1240px; margin: 0 auto;
  display:flex; align-items:center; justify-content: space-between;
  padding: 10px 20px;
  background: rgba(8,12,9,0.55);
  backdrop-filter: blur(16px);
  border: 1px solid var(--line);
  border-radius: 100px;
}
.nav-brand{ display:flex; align-items:center; gap: 10px; }
.nav-mark{ height: 22px; width:auto; opacity: 0.9; filter: drop-shadow(0 0 6px rgba(57,255,158,0.4)); }
.nav-logo{
  font-family: var(--font-mono); font-weight:700; letter-spacing: 0.03em; font-size: 14px;
}
.nav-logo .accent{ color: var(--green); }
.nav-links{ display:flex; gap: 30px; }
.nav-links a{
  font-family: var(--font-mono); font-size: 12.5px; color: var(--ink-dim);
  text-transform: uppercase; letter-spacing: 0.09em;
  transition: color 0.2s;
}
.nav-links a:hover{ color: var(--green); }
.nav-cta{
  font-family: var(--font-mono); font-size: 12px; font-weight: 700; letter-spacing: 0.05em;
  background: var(--green); border: none; color: #04140a;
  padding: 10px 20px; border-radius: 100px;
  transition: all 0.2s;
  text-transform: uppercase;
}
.nav-cta:hover{ box-shadow: 0 0 24px rgba(57,255,158,0.5); transform: translateY(-1px); }
@media (max-width: 760px){ .nav-links{ display:none; } }

/* ===== Hero ===== */
.hero{
  position: relative;
  min-height: 100vh;
  display:flex; flex-direction: column; align-items:center; justify-content:center;
  text-align:center;
  padding: 150px 24px 60px;
  overflow:hidden;
}
.hero-glow{
  position:absolute; z-index:0; top: -25%; left:50%; transform: translateX(-50%);
  width: 1000px; height: 1000px; border-radius:50%;
  background: radial-gradient(circle, rgba(31,174,107,0.22) 0%, rgba(57,255,158,0.06) 42%, transparent 70%);
  filter: blur(10px);
  animation: pulse-glow 6s ease-in-out infinite;
}
@keyframes pulse-glow{
  0%,100%{ opacity: 0.65; transform: translateX(-50%) scale(1); }
  50%{ opacity: 1; transform: translateX(-50%) scale(1.06); }
}
.hero-content{ position: relative; z-index: 2; max-width: 900px; }

.hero-tags{ display:flex; gap: 12px; justify-content:center; flex-wrap: wrap; margin-bottom: 32px; }
.tag-chip{
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; color: var(--ink-dim);
  border: 1px solid var(--line); border-radius: 100px; padding: 7px 16px;
  background: rgba(255,255,255,0.02);
  display: inline-flex; align-items:center; gap: 8px;
  text-transform: uppercase;
}
.tag-chip b{ color: var(--green); font-weight: 600; }
.tag-chip .dot{
  width: 6px; height: 6px; border-radius: 50%; background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: blink 1.4s ease-in-out infinite;
}

.hero-title{
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(52px, 10vw, 118px);
  line-height: 0.96; letter-spacing: -0.02em;
  margin: 0 0 20px;
  color: #f4faf6;
  text-shadow: 0 0 60px rgba(57,255,158,0.15);
}
.hero-title .accent{
  background: linear-gradient(180deg, var(--green) 0%, var(--green-soft) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

.hero-kicker{
  font-family: var(--font-mono); font-size: clamp(14px,2vw,18px); letter-spacing: 0.35em; color: var(--ink-dim);
  margin: 0 0 22px; text-transform: uppercase;
}

.hero-sub{
  font-size: 16px; color: var(--ink-dim);
  max-width: 560px; margin: 0 auto 44px;
}
#typewriter{ font-family: var(--font-mono); color: var(--green); font-size: 13px; display:block; margin-top: 10px; }
.cursor{ animation: blink 1s step-end infinite; color: var(--green); }
@keyframes blink{ 50%{ opacity: 0; } }

.hero-actions{ display:flex; gap: 16px; justify-content:center; flex-wrap: wrap; margin-bottom: 56px; }

.btn{
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.05em; text-transform: uppercase;
  padding: 15px 32px; border-radius: 100px;
  transition: all 0.2s; display:inline-block; font-weight: 700;
}
.btn-primary{
  background: var(--green); color: #04140a;
}
.btn-primary:hover{ box-shadow: 0 0 30px rgba(57,255,158,0.5); transform: translateY(-1px); }
.btn-ghost{
  border: 1px solid var(--line-strong); color: var(--ink); background: rgba(255,255,255,0.02);
}
.btn-ghost:hover{ border-color: var(--green); color: var(--green); }

.hero-logos{ display:flex; align-items:center; justify-content:center; gap: 24px; opacity: 0.85; }
.hero-logo{ height: 40px; width:auto; filter: drop-shadow(0 0 10px rgba(57,255,158,0.2)); }
.hero-divider{ width: 1px; height: 28px; background: var(--line-strong); }

.scroll-hint{
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%);
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.2em; color: var(--ink-dim);
  animation: bob 2s ease-in-out infinite;
}
@keyframes bob{ 0%,100%{ transform: translateX(-50%) translateY(0);} 50%{ transform: translateX(-50%) translateY(6px);} }

/* ===== Sections shared ===== */
main{ position: relative; z-index: 1; }
section{ padding: 110px 24px; max-width: 1220px; margin: 0 auto; }
.section-head{ margin-bottom: 44px; }
.section-eyebrow{
  font-family: var(--font-mono); font-size: 13px; color: var(--green);
  letter-spacing: 0.08em; display:block; margin-bottom: 14px;
}
.section-eyebrow.center{ text-align:center; }
.section-head h2{
  font-size: clamp(32px, 4.4vw, 52px); margin: 0 0 14px; font-weight: 700; letter-spacing: -0.01em;
}
.section-desc{ color: var(--ink-dim); font-size: 16px; margin: 0; max-width: 560px; }

.intro{ max-width: 820px; padding-top: 40px; padding-bottom: 20px; text-align:center; }
.intro-text{ font-size: clamp(19px, 2.4vw, 25px); color: var(--ink-dim); line-height: 1.6; font-weight: 400; }
.accent-text{ color: var(--green); }

/* ===== Filter bar ===== */
.filter-bar{ display:flex; flex-wrap: wrap; gap: 10px; margin-bottom: 40px; }
.filter-btn{
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.05em; text-transform: uppercase;
  background: rgba(255,255,255,0.02); color: var(--ink-dim); border: 1px solid var(--line);
  padding: 9px 16px; border-radius: 100px; transition: all 0.2s;
}
.filter-btn:hover{ border-color: var(--line-strong); color: var(--ink); }
.filter-btn.active{ background: var(--green); border-color: var(--green); color: #04140a; font-weight: 700; }

/* ===== Event grid / flip cards ===== */
.event-grid{
  display:grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 20px;
}
.flip-card{
  perspective: 1600px;
  height: 400px;
  cursor: pointer;
}
.flip-card-inner{
  position: relative; width:100%; height:100%;
  transition: transform 0.6s cubic-bezier(.4,.2,.2,1);
  transform-style: preserve-3d;
}
.flip-card.flipped .flip-card-inner{ transform: rotateY(180deg); }

.flip-face{
  position: absolute; inset:0;
  backface-visibility: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-panel);
  backdrop-filter: blur(10px);
  padding: 26px;
  display:flex; flex-direction: column;
  overflow: hidden;
}
.flip-face::before{
  content:''; position:absolute; top:0; left:0; right:0; height: 2px;
  background: linear-gradient(90deg, var(--green), transparent);
  transform: scaleX(0); transform-origin: left; transition: transform 0.3s;
}
.flip-card:hover .flip-face::before{ transform: scaleX(1); }
.flip-card:hover .flip-face{ border-color: var(--line-strong); }

.face-back{ transform: rotateY(180deg); background: var(--bg-panel-solid); }

.card-top{ display:flex; justify-content: space-between; align-items:flex-start; margin-bottom: 18px; }
.card-icon{
  width: 42px; height: 42px; border-radius: 10px;
  border: 1px solid var(--line-strong); background: rgba(57,255,158,0.06);
  display:flex; align-items:center; justify-content:center; color: var(--green);
}
.card-icon svg{ width: 20px; height: 20px; }
.card-code{ font-family: var(--font-mono); font-size: 12px; color: var(--ink-dim); }

.card-name{ font-size: 24px; font-weight: 700; margin: 0 0 4px; }
.card-tag{ font-family: var(--font-mono); font-size: 12px; color: var(--green); margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.04em; }
.card-desc{ color: var(--ink-dim); font-size: 13.5px; line-height: 1.6; flex: 1; }

.card-chips{ display:flex; gap: 8px; flex-wrap: wrap; margin: 16px 0 14px; }
.chip{ font-family: var(--font-mono); font-size: 11px; border: 1px solid var(--line); border-radius: 100px; padding: 5px 12px; color: var(--ink-dim); }

.card-flip-hint{ font-family: var(--font-mono); font-size: 11px; color: var(--green); display:flex; align-items:center; gap: 6px; text-transform: uppercase; letter-spacing: 0.05em; }

.back-label{ font-family: var(--font-mono); font-size: 11px; color: var(--green); letter-spacing: 0.1em; margin-bottom: 6px; text-transform: uppercase; }
.back-title{ font-size: 21px; font-weight: 700; margin: 0 0 16px; }

.back-facts{ display:flex; flex-direction: column; gap: 0; margin-bottom: 14px; }
.back-fact{ display:flex; justify-content: space-between; padding: 9px 0; border-bottom: 1px solid rgba(255,255,255,0.05); font-size: 12.5px; }
.back-fact .lbl{ font-family: var(--font-mono); color: var(--ink-dim); text-transform: uppercase; font-size: 10.5px; letter-spacing: 0.06em; }
.back-fact .val{ font-weight: 600; text-align: right; }

.back-rules-label{ font-family: var(--font-mono); font-size: 10.5px; color: var(--green); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 8px; }
.back-rules{ display:flex; flex-direction: column; gap: 6px; overflow-y: auto; flex: 1; }
.back-rules li{ font-size: 12.5px; color: var(--ink-dim); padding-left: 14px; position: relative; line-height: 1.5; }
.back-rules li::before{ content:'•'; color: var(--green); position:absolute; left:0; }

/* ===== Timeline ===== */
.timeline-track{ position: relative; padding-left: 32px; }
.timeline-track::before{
  content:''; position:absolute; left: 5px; top: 6px; bottom: 6px; width: 1px;
  background: linear-gradient(180deg, var(--green), var(--green-deep), transparent);
}
.timeline-item{ position: relative; padding-bottom: 46px; }
.timeline-item:last-child{ padding-bottom: 0; }
.timeline-dot{
  position:absolute; left: -32px; top: 4px; width: 11px; height:11px; border-radius:50%;
  background: var(--bg); border: 2px solid var(--green); box-shadow: 0 0 12px rgba(57,255,158,0.5);
}
.timeline-date{ font-family: var(--font-mono); font-size: 12px; color: var(--green); letter-spacing: 0.08em; margin-bottom: 6px; }
.timeline-title{ font-size: 21px; font-weight: 700; margin-bottom: 6px; }
.timeline-desc{ color: var(--ink-dim); max-width: 620px; font-size: 15px; }

/* ===== Register ===== */
.register-section{ padding-top: 40px; }
.register-card{
  border: 1px solid var(--line-strong); border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(31,174,107,0.1), rgba(57,255,158,0.03));
  padding: 60px 40px; text-align: center;
}
.register-card h2{ font-size: clamp(28px,4vw,40px); margin: 10px 0 14px; }
.register-card p{ color: var(--ink-dim); max-width: 480px; margin: 0 auto 30px; }
.register-actions{ display:flex; gap:16px; justify-content:center; flex-wrap: wrap; }

/* ===== Contact ===== */
.contact-email{ margin-bottom: 48px; }
.contact-email a{
  font-family: var(--font-mono); font-size: 17px; color: var(--green);
  border-bottom: 1px dashed var(--line-strong); padding-bottom: 3px;
}
.contact-email a:hover{ color: #fff; }

.oc-columns{ display:grid; grid-template-columns: repeat(auto-fit, minmax(300px,1fr)); gap: 30px; }
.oc-col{ border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; background: var(--bg-panel); backdrop-filter: blur(10px); }
.oc-club-header{ display:flex; align-items:center; gap: 14px; margin-bottom: 22px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.oc-logo{ height: 34px; width: auto; opacity: 0.85; }
.oc-club-header h3{ font-size: 16px; margin:0; font-family: var(--font-mono); font-weight: 500; letter-spacing: 0.02em; }

.oc-list li{
  display:flex; flex-wrap: wrap; align-items:baseline; justify-content: space-between; gap: 6px;
  padding: 11px 0; border-bottom: 1px solid rgba(255,255,255,0.04);
}
.oc-list li:last-child{ border-bottom:none; }
.oc-name{ font-weight: 600; font-size: 14.5px; flex: 1 1 140px; }
.oc-role{ font-family: var(--font-mono); font-size: 11.5px; color: var(--ink-dim); }
.oc-phone{ font-family: var(--font-mono); font-size: 12px; color: var(--green); }

/* ===== Footer ===== */
footer{ border-top: 1px solid var(--line); padding: 30px 24px; position: relative; z-index: 1; }
.footer-inner{
  max-width: 1200px; margin: 0 auto; display:flex; gap: 12px; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: 12px; color: var(--ink-dim);
}
.footer-dot{ color: var(--line-strong); }

/* ===== Reveal on scroll ===== */
.reveal{ opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible{ opacity: 1; transform: translateY(0); }

@media (max-width: 600px){
  section{ padding: 80px 18px; }
  .flip-card{ height: 380px; }
}