/* Terasia product website — dark mode, no build step */
:root {
  --bg: #0b0f14;
  --bg-alt: #10161d;
  --card: #131a22;
  --border: #1f2a35;
  --text: #e6edf3;
  --text-dim: #8b98a5;
  --accent: #2dd4bf;
  --accent-dim: rgba(45, 212, 191, 0.12);
  --radius: 14px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* NAV */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(11, 15, 20, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-size: 1.25rem; font-weight: 700; color: var(--text); text-decoration: none; letter-spacing: -0.02em; }
.logo-accent { color: var(--accent); }
.nav-links { display: flex; gap: 28px; }
.nav-links a { color: var(--text-dim); text-decoration: none; font-size: 0.925rem; transition: color 0.15s; }
.nav-links a:hover { color: var(--text); }

/* BUTTONS */
.btn {
  display: inline-block; padding: 12px 24px; border-radius: 10px;
  font-weight: 600; font-size: 0.95rem; text-decoration: none;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}
.btn-primary { background: var(--accent); color: #04211c; }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(45, 212, 191, 0.3); }
.btn-ghost { color: var(--text); border: 1px solid var(--border); background: transparent; }
.btn-ghost:hover { border-color: var(--text-dim); }
.btn-sm { padding: 8px 16px; font-size: 0.875rem; }
.btn-lg { padding: 16px 32px; font-size: 1.05rem; }

/* HERO */
.hero { padding: 96px 0 72px; text-align: center; }
.hero-kicker { color: var(--accent); font-size: 0.8rem; font-weight: 700; letter-spacing: 0.18em; margin-bottom: 20px; }
.hero h1 { font-size: clamp(2.2rem, 5.5vw, 3.6rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.15; }
.accent { color: var(--accent); }
.hero-sub { max-width: 680px; margin: 24px auto 0; color: var(--text-dim); font-size: 1.125rem; }
.hero-cta { margin-top: 36px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-note { margin-top: 24px; color: var(--text-dim); font-size: 0.85rem; }

/* STATS */
.stats { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--bg-alt); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding: 40px 24px; }
.stat { text-align: center; }
.stat-num { display: block; font-size: 1.6rem; font-weight: 800; color: var(--accent); letter-spacing: -0.02em; }
.stat-label { color: var(--text-dim); font-size: 0.85rem; }

/* SECTIONS */
.section { padding: 88px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.kicker { color: var(--accent); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.16em; margin-bottom: 12px; }
.section h2 { font-size: clamp(1.6rem, 3.5vw, 2.3rem); font-weight: 800; letter-spacing: -0.02em; line-height: 1.2; }
.section-sub { color: var(--text-dim); max-width: 640px; margin-top: 14px; }

/* TAHAPAN (step cards) */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 44px; }
.step-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 22px; display: flex; flex-direction: column;
}
.step-card-accent { border-color: rgba(45, 212, 191, 0.45); background: linear-gradient(180deg, var(--accent-dim), var(--card)); }
.step-tag { color: var(--accent); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.14em; margin-bottom: 14px; }
.step-card h3 { font-size: 1.12rem; margin-bottom: 10px; }
.step-card p { color: var(--text-dim); font-size: 0.9rem; flex: 1; }
.step-cost { margin-top: 14px; font-size: 0.8rem !important; font-weight: 600; color: var(--accent) !important; }

/* FITUR */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 44px; }
.feature-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 24px; transition: border-color 0.15s, transform 0.15s;
}
.feature-card:hover { border-color: rgba(45, 212, 191, 0.4); transform: translateY(-2px); }
.feature-icon { font-size: 1.7rem; margin-bottom: 14px; }
.feature-card h3 { font-size: 1.08rem; margin-bottom: 8px; }
.feature-card p { color: var(--text-dim); font-size: 0.9rem; }

/* CARA KERJA */
.how-list { margin-top: 44px; display: flex; flex-direction: column; gap: 0; }
.how-item {
  display: flex; gap: 26px; padding: 30px 0;
  border-top: 1px solid var(--border);
}
.how-item:last-child { border-bottom: 1px solid var(--border); }
.how-num {
  font-size: 1.9rem; font-weight: 800; color: var(--accent);
  opacity: 0.85; min-width: 56px; line-height: 1.2; letter-spacing: -0.03em;
}
.how-item h3 { font-size: 1.15rem; margin-bottom: 8px; }
.how-item p { color: var(--text-dim); font-size: 0.95rem; max-width: 640px; }
.how-proof { margin-top: 10px; font-size: 0.85rem !important; font-weight: 600; color: var(--accent) !important; }

/* CTA */
.cta { padding: 100px 0; text-align: center; background: radial-gradient(ellipse at center, rgba(45, 212, 191, 0.08), transparent 65%); }
.cta h2 { font-size: clamp(1.7rem, 4vw, 2.5rem); font-weight: 800; letter-spacing: -0.02em; }
.cta p { color: var(--text-dim); margin: 14px 0 32px; }

/* FOOTER */
.footer { border-top: 1px solid var(--border); padding: 44px 0 28px; background: var(--bg-alt); }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 20px; }
.footer-tag { color: var(--text-dim); font-size: 0.875rem; margin-top: 6px; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { color: var(--text-dim); text-decoration: none; font-size: 0.9rem; }
.footer-links a:hover { color: var(--text); }
.footer-copy { margin-top: 28px; color: var(--text-dim); font-size: 0.8rem; }

/* RESPONSIVE */
@media (max-width: 900px) {
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .nav-links { display: none; }
  .steps-grid, .feature-grid, .stats-grid { grid-template-columns: 1fr; }
  .hero { padding: 64px 0 48px; }
  .how-item { flex-direction: column; gap: 8px; }
}