/* ============================================
   COBOL.com.ar — Minimal Landing
   ============================================ */

:root {
  --color-bg: #f8f7f4;
  --color-bg-alt: #f0efe9;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #5c5c5c;
  --color-text-muted: #8a8a8a;
  --color-accent: #2d5a3d;
  --color-accent-hover: #1e3d2a;
  --color-border: #e2e0db;
  --color-grid: #e8e6e1;

  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 10rem;

  --max-width: 1120px;
  --radius: 10px;
  --radius-sm: 6px;

  --transition: 0.2s ease;
}

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

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

body {
  font-family: var(--font-main);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 60px 60px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

/* ---- Container ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* ---- Navbar ---- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(248, 247, 244, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.navbar--scrolled {
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
}

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

.navbar__logo {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

.navbar__logo-dot {
  color: var(--color-accent);
}

.navbar__nav {
  display: flex;
  gap: var(--space-lg);
}

.navbar__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

.navbar__link:hover {
  color: var(--color-text);
}

.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.navbar__toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}

/* ---- Hero ---- */
.hero {
  padding: calc(60px + var(--space-3xl)) 0 var(--space-3xl);
}

.hero__h1 {
  font-size: clamp(3.5rem, 8vw, 6.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.hero__title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text-secondary);
  max-width: 780px;
}

.hero__title-bold {
  display: block;
  font-weight: 700;
  color: var(--color-text);
}

.hero__subtitle {
  margin-top: var(--space-md);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 540px;
}

.hero__actions {
  margin-top: var(--space-lg);
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.4rem;
  font-family: var(--font-main);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn--primary {
  background: var(--color-text);
  color: var(--color-bg);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.btn--ghost:hover {
  border-color: var(--color-text-secondary);
  color: var(--color-text);
}

/* ---- Sections ---- */
.section {
  padding: var(--space-3xl) 0;
}

.section--alt {
  background-color: var(--color-bg-alt);
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 60px 60px;
}

.section__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.section__title {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  max-width: 600px;
}

.section__intro {
  margin-top: var(--space-sm);
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  max-width: 540px;
  line-height: 1.7;
}

/* ---- Timeline ---- */
.timeline {
  margin-top: var(--space-xl);
  position: relative;
  padding-left: var(--space-xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--color-border);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-xl);
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: var(--space-md);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-xl) + 2px);
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-bg);
}

.section--alt .timeline__item::before {
  border-color: var(--color-bg-alt);
}

.timeline__year {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent);
  padding-top: 2px;
  font-variant-numeric: tabular-nums;
}

.timeline__content h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.timeline__content p {
  font-size: 0.925rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* ---- Stats Grid ---- */
.stats-grid {
  margin-top: var(--space-xl);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-lg);
}

.stat-card__number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
  line-height: 1;
}

.stat-card__label {
  margin-top: var(--space-xs);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* ---- Industries ---- */
.industries {
  margin-top: var(--space-xl);
}

.industries__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.industries__grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.industry-tag {
  padding: 0.4rem 1rem;
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  color: var(--color-text-secondary);
}

/* ---- Resources Grid ---- */
.resources-grid {
  margin-top: var(--space-xl);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.resource-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-lg);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.resource-card:hover {
  border-color: var(--color-text-muted);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

.resource-card__icon {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  color: var(--color-accent);
}

.resource-card__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.resource-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
  flex: 1;
}

.resource-card__link {
  margin-top: var(--space-sm);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-accent);
}

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

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.footer__logo {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.footer__copy {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer__links a {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

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

/* ---- Fade-in Animation ---- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .navbar__nav {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(248, 247, 244, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md);
    gap: var(--space-sm);
  }

  .navbar__nav.is-open {
    display: flex;
  }

  .navbar__toggle {
    display: flex;
  }

  .navbar__toggle.is-open span:first-child {
    transform: rotate(45deg) translate(2px, 2px);
  }

  .navbar__toggle.is-open span:last-child {
    transform: rotate(-45deg) translate(2px, -2px);
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .resources-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: calc(60px + var(--space-2xl));
    padding-bottom: var(--space-2xl);
  }

  .section {
    padding: var(--space-2xl) 0;
  }

  .timeline {
    padding-left: var(--space-lg);
  }

  .timeline__item {
    grid-template-columns: 56px 1fr;
    gap: var(--space-sm);
  }

  .footer__inner {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  .footer__brand {
    flex-direction: column;
    gap: var(--space-xs);
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .resources-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}