/* ============================================
   TheOPC.Club — Main Stylesheet
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg: #0b1120;
  --color-bg-alt: #0f172a;
  --color-surface: #1e293b;
  --color-border: #334155;
  --color-text: #e2e8f0;
  --color-text-dim: #94a3b8;
  --color-accent: #818cf8;
  --color-accent2: #34d399;
  --gradient: linear-gradient(135deg, #818cf8 0%, #34d399 100%);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,.3);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--color-accent2); }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* --- Navbar --- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(11, 17, 32, .8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: background .3s;
}

.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.25rem; font-weight: 700; color: var(--color-text);
  display: flex; align-items: center; gap: 4px;
}
.logo-icon { font-size: 1.5rem; }
.logo-dot { color: var(--color-accent); }

.nav-links { display: flex; list-style: none; gap: 32px; align-items: center; }
.nav-links a { color: var(--color-text-dim); font-size: .9rem; font-weight: 500; }
.nav-links a:hover { color: var(--color-text); }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--color-text); border-radius: 2px; transition: .3s; }

@media (max-width: 768px) {
  .nav-links {
    position: fixed; top: 64px; left: 0; right: 0;
    background: var(--color-bg-alt); border-bottom: 1px solid var(--color-border);
    flex-direction: column; padding: 24px; gap: 16px;
    transform: translateY(-120%); transition: transform .3s ease;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-toggle { display: flex; }
}

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 28px; border-radius: 8px; font-weight: 600; font-size: .95rem;
  border: none; cursor: pointer; transition: all .25s ease;
}
.btn-primary {
  background: var(--gradient); color: #0b1120;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(129,140,248,.35); color: #0b1120; }
.btn-outline {
  background: transparent; color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-outline:hover { border-color: var(--color-accent); color: var(--color-accent); }
.btn-sm { padding: 8px 20px; font-size: .85rem; }

/* --- Hero --- */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute; inset: 0; z-index: 0;
}

#heroCanvas {
  width: 100%; height: 100%;
}

.hero-content {
  position: relative; z-index: 1; text-align: center;
  max-width: 800px; padding-top: 80px;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800; line-height: 1.1;
  margin-bottom: 24px;
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-dim);
  max-width: 600px; margin: 0 auto 40px;
  line-height: 1.8;
}

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

/* --- Sections --- */
.section {
  padding: 120px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800; text-align: center; margin-bottom: 16px;
}

.section-subtitle {
  text-align: center; color: var(--color-text-dim);
  max-width: 640px; margin: 0 auto 64px;
  font-size: 1.1rem; line-height: 1.8;
}

/* --- Grid --- */
.grid { display: grid; gap: 32px; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(360px, 1fr)); }

/* --- Cards --- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  transition: transform .3s, box-shadow .3s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }

.card-icon { font-size: 2.5rem; margin-bottom: 16px; }
.card h3 { font-size: 1.2rem; margin-bottom: 12px; }
.card p { color: var(--color-text-dim); font-size: .95rem; }

/* --- Feature Items --- */
.feature-item {
  padding: 40px;
  border-left: 3px solid var(--color-border);
  transition: border-color .3s;
}
.feature-item:hover { border-color: var(--color-accent); }

.feature-number {
  font-family: var(--font-mono);
  font-size: .85rem; color: var(--color-accent);
  margin-bottom: 12px; letter-spacing: 2px;
}
.feature-item h3 { font-size: 1.3rem; margin-bottom: 12px; }
.feature-item p { color: var(--color-text-dim); line-height: 1.8; }

/* --- Stats --- */
.stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 32px; text-align: center;
}

.stat {
  padding: 40px 24px;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.stat-number {
  font-size: 3rem; font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label { color: var(--color-text-dim); margin-top: 8px; font-size: .9rem; text-transform: uppercase; letter-spacing: 2px; }

/* --- CTA --- */
.section-cta {
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.join-form {
  display: flex; gap: 12px; justify-content: center;
  max-width: 480px; margin: 0 auto;
  flex-wrap: wrap;
}

.input {
  flex: 1; min-width: 240px;
  padding: 14px 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  font-size: 1rem;
  outline: none;
  transition: border-color .3s;
}
.input:focus { border-color: var(--color-accent); }

.form-note { text-align: center; color: var(--color-text-dim); margin-top: 16px; font-size: .85rem; }

/* --- Footer --- */
.footer {
  padding: 48px 0 32px;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex; flex-direction: column; align-items: center; gap: 24px;
}

.footer-brand { font-size: 1.1rem; font-weight: 700; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { color: var(--color-text-dim); font-size: .9rem; }
.footer-copy { color: var(--color-text-dim); font-size: .8rem; }

/* --- Animations --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  opacity: 0;
  animation: fadeInUp .7s ease forwards;
}

.fade-in:nth-child(1) { animation-delay: .1s; }
.fade-in:nth-child(2) { animation-delay: .2s; }
.fade-in:nth-child(3) { animation-delay: .3s; }

/* --- Scroll reveal --- */
.reveal {
  opacity: 0; transform: translateY(40px);
  transition: opacity .8s ease, transform .8s ease;
}
.reveal.visible {
  opacity: 1; transform: translateY(0);
}