/* ============================================
   ContainifyCI Landing Page — Main Stylesheet
   ============================================ */

/* --- Custom Properties --- */
:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --surface: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-violet: #8b5cf6;
  --error: #ef4444;

  --font-heading: 'JetBrains Mono', monospace;
  --font-body: 'Inter', sans-serif;
  --font-code: 'JetBrains Mono', monospace;

  --max-width: 1200px;
  --nav-height: 64px;
  --radius: 12px;
  --radius-sm: 8px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color .2s;
}
a:hover { color: #22d3ee; }

ul, ol { list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.2;
  font-weight: 700;
}

code, pre {
  font-family: var(--font-code);
}

/* --- Utility --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
}

.section-label {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-cyan);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 3rem);
  margin-bottom: 1rem;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.125rem;
  max-width: 640px;
}

.glass {
  background: rgba(30, 41, 59, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(148, 163, 184, 0.1);
  border-radius: var(--radius);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  border-radius: 9999px;
  background: rgba(6, 182, 212, 0.1);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.2);
  font-family: var(--font-heading);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: transform .15s, box-shadow .15s, background .2s;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent-cyan);
  color: var(--bg-primary);
  box-shadow: 0 0 24px rgba(6, 182, 212, 0.3);
}
.btn-primary:hover {
  background: #22d3ee;
  color: var(--bg-primary);
  box-shadow: 0 0 32px rgba(6, 182, 212, 0.45);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(148, 163, 184, 0.25);
}
.btn-secondary:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

/* --- Fade-in animation --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =========================
   1. Navigation
   ========================= */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(10, 14, 23, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.08);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text-primary);
}
.nav-logo:hover { color: var(--text-primary); }
.nav-logo svg { width: 28px; height: 28px; }

.nav-links {
  display: none;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color .2s;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-cta {
  display: none;
}

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 14, 23, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 2rem;
  z-index: 99;
  flex-direction: column;
  gap: 1.5rem;
}
.mobile-menu.open {
  display: flex;
}
.mobile-menu a {
  font-size: 1.25rem;
  color: var(--text-secondary);
}
.mobile-menu a:hover { color: var(--text-primary); }

/* =========================
   2. Hero
   ========================= */
.hero {
  position: relative;
  padding: calc(var(--nav-height) + 4rem) 0 5rem;
  text-align: center;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, rgba(6, 182, 212, 0.08) 40%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.hero h1 {
  font-size: clamp(2.25rem, 6vw, 4rem);
  margin-bottom: 1.5rem;
  line-height: 1.1;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: clamp(1rem, 2vw, 1.25rem);
  max-width: 640px;
  margin: 0 auto 2.5rem;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

/* =========================
   3. Problem
   ========================= */
.problem {
  background: var(--bg-secondary);
}

.problem-text {
  max-width: 720px;
}

.problem-text p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 1.0625rem;
}

.problem-text strong {
  color: var(--text-primary);
}

.problem-code {
  margin-top: 2rem;
  padding: 1.5rem;
  font-size: 1rem;
  overflow-x: auto;
}

.problem-code code {
  color: var(--accent-green);
}

.problem-tagline {
  margin-top: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* =========================
   4. Comparison
   ========================= */
.comparison-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.comparison-card {
  padding: 2rem;
  border-radius: var(--radius);
}

.comparison-card h3 {
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.comparison-card.old h3 { color: var(--error); }
.comparison-card.new h3 { color: var(--accent-green); }

.comparison-card ul {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.comparison-card li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.5;
}

.comparison-card li .icon {
  flex-shrink: 0;
  margin-top: 2px;
  font-size: 1rem;
}

.comparison-card.old li .icon { color: var(--error); }
.comparison-card.new li .icon { color: var(--accent-green); }

/* =========================
   5. How It Works
   ========================= */
.steps-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.step-card {
  padding: 2rem;
  text-align: center;
}

.step-number {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.75rem;
}

.step-card.define .step-number { color: var(--accent-amber); }
.step-card.containerize .step-number { color: var(--accent-cyan); }
.step-card.ship .step-number { color: var(--accent-green); }

.step-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.step-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.step-card.define h3 { color: var(--accent-amber); }
.step-card.containerize h3 { color: var(--accent-cyan); }
.step-card.ship h3 { color: var(--accent-green); }

.step-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.steps-arrow {
  display: none;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.5rem;
}

/* =========================
   6. Benefits
   ========================= */
.benefits {
  background: var(--bg-secondary);
}

.benefits-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.benefit-card {
  padding: 1.75rem;
}

.benefit-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.benefit-card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.benefit-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
}

/* =========================
   7. Get Started
   ========================= */
.get-started-terminal {
  margin-top: 2.5rem;
  overflow: hidden;
  max-width: 680px;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: rgba(15, 23, 42, 0.8);
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.terminal-dot.red { background: #ef4444; }
.terminal-dot.yellow { background: #f59e0b; }
.terminal-dot.green { background: #10b981; }

.terminal-title {
  flex: 1;
  text-align: center;
  font-family: var(--font-code);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.terminal-body {
  position: relative;
  padding: 1.5rem;
}

.terminal-body pre {
  margin: 0;
  overflow-x: auto;
}

.terminal-body code {
  font-size: 0.875rem;
  line-height: 1.8;
}

.copy-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: rgba(148, 163, 184, 0.1);
  border: 1px solid rgba(148, 163, 184, 0.15);
  color: var(--text-secondary);
  padding: 0.375rem 0.625rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-code);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all .2s;
}
.copy-btn:hover {
  background: rgba(148, 163, 184, 0.2);
  color: var(--text-primary);
}

.get-started-note {
  margin-top: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  max-width: 680px;
}

.get-started-note code {
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  font-size: 0.8125rem;
}

/* =========================
   8. Real-World Example
   ========================= */
.example {
  background: var(--bg-secondary);
}

.example-blocks {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.example-block {
  overflow: hidden;
}

.example-block-header {
  padding: 0.75rem 1rem;
  background: rgba(15, 23, 42, 0.8);
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.example-block-label {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.example-block-file {
  font-family: var(--font-code);
  font-size: 0.6875rem;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
  padding: 0.125rem 0.5rem;
  border-radius: 4px;
}

.example-block pre {
  padding: 1.25rem;
  margin: 0;
  overflow-x: auto;
}

.example-block code {
  font-size: 0.8125rem;
  line-height: 1.7;
}

.example-callout {
  margin-top: 2rem;
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--accent-cyan);
}

.example-callout p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.example-callout strong {
  color: var(--text-primary);
}

.example-callout a {
  color: var(--accent-cyan);
}

/* =========================
   9. Ecosystem
   ========================= */
.ecosystem-category {
  margin-top: 2.5rem;
}

.ecosystem-category + .ecosystem-category {
  margin-top: 2rem;
}

.ecosystem-category-title {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ecosystem-grid {
  display: grid;
  gap: 1rem;
}

.eco-card {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: border-color .2s;
}
.eco-card:hover {
  border-color: rgba(6, 182, 212, 0.3);
}

.eco-card h4 {
  font-size: 0.9375rem;
}

.eco-card h4 a {
  color: var(--text-primary);
}
.eco-card h4 a:hover {
  color: var(--accent-cyan);
}

.eco-card p {
  color: var(--text-secondary);
  font-size: 0.8125rem;
}

/* =========================
   10. Under the Hood
   ========================= */
.hood {
  background: var(--bg-secondary);
}

.hood-comparison {
  margin-top: 2.5rem;
  overflow-x: auto;
}

.hood-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.hood-table th,
.hood-table td {
  text-align: left;
  padding: 0.875rem 1rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.hood-table th {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  background: rgba(15, 23, 42, 0.5);
}

.hood-table td {
  color: var(--text-secondary);
}

.hood-table td:first-child {
  color: var(--text-primary);
  font-weight: 500;
}

.hood-table .yaml-col { color: var(--error); }
.hood-table .go-col { color: var(--accent-green); }

.hood-arch {
  margin-top: 3rem;
}

.hood-arch h3 {
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
}

.arch-flow {
  display: flex;
  flex-direction: column;
  gap: 0;
  align-items: center;
}

.arch-step {
  padding: 1rem 1.5rem;
  text-align: center;
  font-family: var(--font-code);
  font-size: 0.8125rem;
  width: 100%;
  max-width: 400px;
}

.arch-arrow {
  color: var(--text-secondary);
  font-size: 1.25rem;
  padding: 0.25rem 0;
}

.hood-arch-desc {
  margin-top: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  max-width: 720px;
}

.integration-pills {
  margin-top: 2.5rem;
}

.integration-pills h3 {
  font-size: 1.125rem;
  margin-bottom: 1rem;
}

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

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  border-radius: 9999px;
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.1);
}

/* =========================
   11. Contributing
   ========================= */
.contrib-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2.5rem;
}

.contrib-card {
  padding: 1.75rem;
  text-align: center;
}

.contrib-card .contrib-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.contrib-card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.contrib-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.contrib-footer {
  text-align: center;
  margin-top: 2.5rem;
}

.contrib-footer p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-style: italic;
}

/* =========================
   12. Footer
   ========================= */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(148, 163, 184, 0.08);
  padding: 3rem 0 0;
}

.footer-grid {
  display: grid;
  gap: 2rem;
  padding-bottom: 2rem;
}

.footer-col h4 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col a {
  color: var(--text-secondary);
  font-size: 0.875rem;
}
.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
  border-top: 1px solid rgba(148, 163, 184, 0.08);
  padding: 1.5rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  color: var(--text-secondary);
  font-size: 0.8125rem;
}

/* =========================
   Responsive — SM (640px)
   ========================= */
@media (min-width: 640px) {
  .comparison-grid {
    grid-template-columns: 1fr 1fr;
  }

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

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

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

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

/* =========================
   Responsive — MD (768px)
   ========================= */
@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }

  .nav-cta {
    display: inline-flex;
  }

  .hamburger {
    display: none;
  }

  .steps-grid {
    grid-template-columns: 1fr auto 1fr auto 1fr;
  }

  .steps-arrow {
    display: flex;
  }

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

/* =========================
   Responsive — LG (1024px)
   ========================= */
@media (min-width: 1024px) {
  .section-title {
    font-size: clamp(2rem, 4vw, 3.5rem);
  }

  .hero h1 {
    font-size: clamp(2.75rem, 5vw, 4.5rem);
  }

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

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

  .contrib-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* =========================
   Responsive — XL (1280px)
   ========================= */
@media (min-width: 1280px) {
  .section {
    padding: 6rem 0;
  }

  .container {
    padding: 0 2rem;
  }
}