/* ============================================================
   Academia Libertador — Under Construction
   Visual style inspired by Vercel's design system
   ============================================================ */

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

/* ---------- Custom Properties ---------- */
:root {
  --bg:            #000000;
  --surface:       #111111;
  --border:        #333333;
  --border-subtle: #1a1a1a;
  --text-primary:  #ededed;
  --text-secondary:#888888;
  --text-tertiary: #555555;
  --accent:        #ffffff;
  --accent-dim:    rgba(255, 255, 255, 0.08);
  --accent-hover:  rgba(255, 255, 255, 0.12);
  --badge-bg:      #111111;
  --badge-border:  #333333;
  --badge-text:    #888888;
  --font-sans:     "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
                   Helvetica, Arial, sans-serif;
  --font-mono:     "JetBrains Mono", "Fira Code", "Cascadia Code",
                   Consolas, monospace;
  --radius-sm:     6px;
  --radius-md:     10px;
  --radius-lg:     14px;
  --shadow-sm:     0 1px 3px rgba(0, 0, 0, 0.6);
  --shadow-md:     0 4px 16px rgba(0, 0, 0, 0.8);
  --transition:    150ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Base ---------- */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- Inter from Google Fonts ---------- */
@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap");

/* ---------- Layout Helpers ---------- */
.container {
  width: 100%;
  max-width: 960px;
  margin-inline: auto;
  padding-inline: 24px;
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
}

.logo-icon {
  width: 28px;
  height: 28px;
  background: var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-icon span {
  font-size: 13px;
  font-weight: 700;
  color: #000;
  line-height: 1;
}

/* Status Badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  color: var(--badge-text);
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #f5a623;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

/* ---------- Hero Section ---------- */
.hero {
  flex: 1;
  display: flex;
  align-items: center;
  padding-block: 80px;
}

.hero-inner {
  display: grid;
  gap: 48px;
}

/* Eyebrow */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 16px;
  height: 1px;
  background: var(--text-tertiary);
}

/* Heading */
.hero-title {
  font-size: clamp(2.25rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--accent);
}

.hero-title em {
  font-style: normal;
  color: var(--text-secondary);
}

/* Description */
.hero-description {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
}

/* Actions */
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition),
              color var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: #e0e0e0;
  border-color: #e0e0e0;
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--accent-hover);
  border-color: #555;
}

/* ---------- Divider ---------- */
.divider {
  border: none;
  border-top: 1px solid var(--border-subtle);
}

/* ---------- Features Grid ---------- */
.features-section {
  padding-block: 72px;
}

.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  margin-bottom: 40px;
}

/* Screen-reader only utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.feature-card {
  background: var(--bg);
  padding: 28px;
  transition: background var(--transition);
}

.feature-card:hover {
  background: var(--surface);
}

.feature-icon {
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  margin-bottom: 16px;
}

.feature-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.feature-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ---------- Notify Section ---------- */
.notify-section {
  padding-block: 72px;
}

.notify-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
}

.notify-card h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.notify-card p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.notify-form {
  display: flex;
  gap: 8px;
  max-width: 420px;
  margin-inline: auto;
}

.notify-input {
  flex: 1;
  height: 40px;
  padding-inline: 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  font-family: var(--font-sans);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.notify-input::placeholder {
  color: var(--text-tertiary);
}

.notify-input:focus {
  border-color: #555;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.06);
}

.btn-sm {
  padding: 9px 18px;
  font-size: 13px;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding-block: 32px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copy {
  font-size: 13px;
  color: var(--text-tertiary);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 13px;
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--text-secondary);
}

/* ---------- Noise Overlay (subtle texture) ---------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.018;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 128px 128px;
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .features-grid {
    grid-template-columns: 1fr;
  }

  .notify-form {
    flex-direction: column;
  }

  .notify-card {
    padding: 32px 24px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}