/* ==========================================================================
   LinuxWorks.org - Open Standards AI, Linux & Kubernetes Architecture
   Desktop, Cloud, Containers, Kubernetes (CNCF) & Knative Serverless AI
   ========================================================================== */

:root {
  --bg-canvas: #f8fafc;
  --bg-surface: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-terminal: #0f172a;
  
  --border-color: #e2e8f0;
  --border-primary: rgba(2, 132, 199, 0.25);
  --border-k8s: rgba(50, 108, 229, 0.25);
  --border-terminal: rgba(255, 255, 255, 0.12);
  
  --primary: #0284c7;
  --primary-hover: #0369a1;
  --primary-dark: #075985;
  --primary-light: #e0f2fe;
  --primary-glow: rgba(2, 132, 199, 0.15);
  
  --k8s-blue: #326ce5;
  --k8s-light: #eef2ff;
  --open-teal: #0d9488;
  --open-teal-light: #f0fdfa;
  --knative-purple: #7c3aed;
  --knative-light: #f5f3ff;
  
  --secondary: #10b981;
  --secondary-light: #d1fae5;
  --accent: #6366f1;
  --accent-light: #eef2ff;
  --amber: #f59e0b;
  --amber-light: #fef3c7;
  
  --text-heading: #0f172a;
  --text-body: #334155;
  --text-muted: #64748b;
  --text-dim: #94a3b8;
  
  --font-sans: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 9999px;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 14px -2px rgba(2, 132, 199, 0.08), 0 2px 6px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 16px 36px -6px rgba(15, 23, 42, 0.08), 0 6px 16px -4px rgba(15, 23, 42, 0.04);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-canvas);
  background-image: 
    radial-gradient(circle at 10% 10%, rgba(2, 132, 199, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 90% 85%, rgba(50, 108, 229, 0.04) 0%, transparent 40%);
  background-attachment: fixed;
  color: var(--text-body);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
}

::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-canvas);
}
::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: var(--radius-pill);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 0;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-heading);
  text-decoration: none;
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #0284c7, #326ce5);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.15rem;
  box-shadow: 0 4px 10px rgba(50, 108, 229, 0.25);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
}

.nav-link {
  color: var(--text-body);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-xs);
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 700;
  padding: 0.65rem 1.3rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.25);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(2, 132, 199, 0.35);
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-heading);
  border-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--bg-subtle);
  border-color: var(--primary);
  color: var(--primary);
}

.btn-sm {
  padding: 0.45rem 0.95rem;
  font-size: 0.85rem;
}

/* Hero Section */
.hero-section {
  padding: 4.5rem 0 3rem;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--border-primary);
  padding: 0.35rem 1rem;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 900;
  color: var(--text-heading);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.gradient-text {
  background: linear-gradient(135deg, #0284c7 0%, #326ce5 40%, #0d9488 80%, #7c3aed 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 780px;
  margin: 0 auto 2.25rem;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

/* Tab Filter for Solutions */
.solutions-tab-bar {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.solution-tab-btn {
  background: #ffffff;
  border: 1px solid var(--border-color);
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-body);
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.solution-tab-btn.active, .solution-tab-btn:hover {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.2);
}

/* Terminal & Recipe Cards */
.terminal-box {
  background: var(--bg-terminal);
  color: #f8fafc;
  border-radius: var(--radius-md);
  padding: 1.75rem 2rem;
  box-shadow: var(--shadow-lg);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  text-align: left;
  border: 1px solid var(--border-terminal);
  overflow-x: auto;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.terminal-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

/* Grid & Cards */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.solution-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.25rem 2rem;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.solution-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin-bottom: 1.25rem;
}

.card-badge {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  width: fit-content;
  margin-bottom: 0.75rem;
}

.card-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-heading);
  margin-bottom: 0.5rem;
}

.card-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

/* Sections */
.section {
  padding: 4.5rem 0;
}

.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  background: var(--primary-light);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
}

.section-title {
  font-size: 2.25rem;
  font-weight: 900;
  color: var(--text-heading);
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  line-height: 1.6;
}

/* Form */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 0.4rem;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-heading);
  font-family: var(--font-sans);
  font-size: 0.95rem;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* Footer */
.footer {
  background: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
  margin-top: 5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-muted);
}