/* SebasTN — payments product, powered by GitHat
   Design tokens mirror the GitHat platform theme so the experience
   feels coherent when users cross between the two. */

:root {
  --bg-dark: #0a0a0f;
  --bg-card: #12121a;
  --bg-elevated: #1a1a24;
  --bg-hover: #22222e;

  --primary: #00d4ff;
  --primary-dark: #0099cc;
  --secondary: #8b5cf6;

  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #6b6b7b;

  --border: #2a2a3a;

  --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #8b5cf6 100%);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);

  --transition: 200ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: #66e3ff;
}

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

ul {
  list-style: none;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.15rem;
}

.brand:hover {
  color: var(--primary);
}

.brand__mark {
  width: 28px;
  height: 28px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
}

.nav nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav nav a {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.nav nav a:hover {
  color: var(--text-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.9rem;
  border: 1px solid transparent;
  transition: all var(--transition);
  cursor: pointer;
}

.btn--lg {
  padding: 0.85rem 1.6rem;
  font-size: 1rem;
}

.btn--primary {
  background: var(--gradient-primary);
  color: var(--bg-dark) !important;
  font-weight: 600;
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  color: var(--bg-dark) !important;
}

.btn--outline {
  background: transparent;
  color: var(--primary) !important;
  border-color: var(--primary);
}

.btn--outline:hover {
  background: rgba(0, 212, 255, 0.08);
  transform: translateY(-2px);
}

.btn--ghost {
  color: var(--text-secondary) !important;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
}

.btn--ghost:hover {
  color: var(--primary) !important;
  border-color: var(--primary);
}

/* Hero */
.hero {
  padding: 5rem 0 4rem;
  background: linear-gradient(180deg, var(--bg-elevated) 0%, var(--bg-dark) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.04) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
}

.hero__inner {
  position: relative;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(0, 212, 255, 0.06);
  border: 1px solid rgba(0, 212, 255, 0.3);
  padding: 0.3rem 0.9rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.5rem;
}

.hero__title {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 2rem;
}

.hero__cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.hero__meta {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section--alt {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.section__title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.section__lede {
  text-align: center;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

/* Cards / grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--transition);
}

.card:hover {
  border-color: rgba(0, 212, 255, 0.3);
  transform: translateY(-3px);
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.6rem;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* Posts */
.post {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  max-width: 640px;
  margin: 0 auto;
}

.post h3 {
  font-size: 1.15rem;
  margin-bottom: 0.4rem;
}

.post h3 a {
  color: var(--text-primary);
}

.post h3 a:hover {
  color: var(--primary);
}

.post__date {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
}

.post p {
  color: var(--text-secondary);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-card);
  padding: 2rem 0;
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.site-footer p {
  color: var(--text-muted);
  font-size: 0.88rem;
}

.site-footer__nav {
  display: flex;
  gap: 1.25rem;
}

.site-footer__nav a {
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.site-footer__nav a:hover {
  color: var(--primary);
}

/* Responsive */
@media (max-width: 720px) {
  .hero__title {
    font-size: 2.2rem;
  }

  .nav nav {
    gap: 0.75rem;
  }

  .nav nav a:not(.btn) {
    display: none;
  }
}