/*! 
 * AlpenSync Automations — Design System CSS
 * Version 1.0
 * 
 * Import Inter font in HTML:
 * <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap" rel="stylesheet">
 */

/* ============================================================
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================================ */
:root {
  /* --- Primary / Alpine Navy --- */
  --color-primary-900: #0F2B4A;
  --color-primary-700: #1A4B7A;
  --color-primary-500: #2D7EB5;
  --color-primary-300: #6BAED8;
  --color-primary-100: #DAE9F5;

  /* --- Secondary / Flow Teal --- */
  --color-secondary-700: #1A7A6E;
  --color-secondary-500: #2EBFAA;
  --color-secondary-300: #7ED9CB;
  --color-secondary-100: #D6F5F0;

  /* --- Accent / Alpine Sun Gold --- */
  --color-accent-600: #C9882D;
  --color-accent-400: #E8A838;
  --color-accent-200: #F5D78E;
  --color-accent-100: #FDF2DC;

  /* --- Neutrals --- */
  --color-neutral-900: #1A1C1E;
  --color-neutral-700: #3D4045;
  --color-neutral-500: #7A7E85;
  --color-neutral-300: #C4C7CC;
  --color-neutral-100: #E8EAED;
  --color-neutral-50: #F5F6F8;
  --color-white: #FFFFFF;

  /* --- Semantic --- */
  --color-success: #2D8F5C;
  --color-warning: #E8A838;
  --color-error: #C94242;

  /* --- Typography --- */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* --- Spacing --- */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* --- Border Radius --- */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* --- Shadows --- */
  --shadow-sm: 0 1px 3px rgba(15, 43, 74, 0.06);
  --shadow-md: 0 2px 8px rgba(15, 43, 74, 0.08);
  --shadow-lg: 0 8px 24px rgba(15, 43, 74, 0.12);
  --shadow-xl: 0 16px 48px rgba(15, 43, 74, 0.15);
  --shadow-glow: 0 4px 14px rgba(232, 168, 56, 0.3);

  /* --- Layout --- */
  --max-width: 1200px;
  --content-padding: 24px;
  --header-height: 72px;
}

/* ============================================================
   2. GLOBAL RESET & BASE
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-neutral-900);
  background-color: var(--color-white);
}

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

a {
  color: var(--color-primary-700);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-primary-900);
}

/* ============================================================
   3. TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary-900);
}

h1 { font-size: 3.5rem; letter-spacing: -0.02em; }
h2 { font-size: 2.5rem; letter-spacing: -0.01em; }
h3 { font-size: 1.75rem; font-weight: 600; }
h4 { font-size: 1.375rem; font-weight: 600; }

p { margin-bottom: 1rem; }

.text-large  { font-size: 1.125rem; }
.text-small  { font-size: 0.875rem; }
.text-caption { font-size: 0.75rem; font-weight: 500; letter-spacing: 0.02em; text-transform: uppercase; }

/* Text utilities */
.text-gradient {
  background: linear-gradient(135deg, var(--color-primary-700), var(--color-secondary-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================================
   4. CONTAINER & LAYOUT
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
}

.section {
  padding: var(--space-4xl) 0;
}

.section-alt {
  background-color: var(--color-neutral-50);
}

.section-dark {
  background-color: var(--color-primary-900);
  color: var(--color-white);
}

.section-dark h1,
.section-dark h2,
.section-dark h3 {
  color: var(--color-white);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

/* ============================================================
   5. HEADER / NAVIGATION
   ============================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-neutral-100);
  height: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-primary-900);
}

.logo img,
.logo svg {
  height: 40px;
  width: auto;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

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

.nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-neutral-700);
  transition: color 0.2s ease;
}

.nav a:hover {
  color: var(--color-primary-700);
}

/* Mobile menu toggle (hidden by default) */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  color: var(--color-neutral-900);
}

/* ============================================================
   6. BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-primary-700);
  color: var(--color-white);
  border-color: var(--color-primary-700);
}

.btn-primary:hover {
  background-color: var(--color-primary-900);
  border-color: var(--color-primary-900);
  color: var(--color-white);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary-700);
  border-color: var(--color-primary-700);
}

.btn-secondary:hover {
  background-color: var(--color-primary-700);
  color: var(--color-white);
}

.btn-cta {
  background-color: var(--color-accent-400);
  color: var(--color-neutral-900);
  border-color: var(--color-accent-400);
  padding: 14px 32px;
  box-shadow: var(--shadow-glow);
}

.btn-cta:hover {
  background-color: var(--color-accent-600);
  border-color: var(--color-accent-600);
  color: var(--color-neutral-900);
  box-shadow: 0 6px 20px rgba(232, 168, 56, 0.4);
  transform: translateY(-1px);
}

.btn-white {
  background-color: var(--color-white);
  color: var(--color-primary-900);
  border-color: var(--color-white);
}

.btn-white:hover {
  background-color: var(--color-neutral-50);
  color: var(--color-primary-900);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.125rem;
}

/* ============================================================
   7. HERO SECTION
   ============================================================ */
.hero {
  padding: var(--space-4xl) 0;
  background: linear-gradient(135deg, var(--color-primary-900) 0%, #0d2240 50%, var(--color-primary-700) 100%);
  color: var(--color-white);
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(46, 191, 170, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(232, 168, 56, 0.05) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero h1 {
  color: var(--color-white);
  margin-bottom: var(--space-lg);
}

.hero p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--space-xl);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(4px);
  border-radius: var(--radius-full);
  padding: 6px 16px 6px 6px;
  font-size: 0.875rem;
  margin-bottom: var(--space-lg);
  color: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.hero-badge-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--color-secondary-500);
  border-radius: 50%;
}

/* ============================================================
   8. CARDS (General)
   ============================================================ */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-lg);
  transition: all 0.3s ease;
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  font-size: 1.5rem;
}

/* ============================================================
   9. SERVICE LEVEL CARDS (The 4 Tiers)
   ============================================================ */
.level-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.level-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all 0.3s ease;
  position: relative;
  display: flex;
  flex-direction: column;
}

.level-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.level-card-header {
  padding: var(--space-lg) var(--space-lg) 0;
}

.level-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.level-1 .level-number { background: var(--color-primary-100); color: var(--color-primary-700); }
.level-2 .level-number { background: var(--color-secondary-100); color: var(--color-secondary-700); }
.level-3 .level-number { background: var(--color-accent-100); color: var(--color-accent-600); }
.level-4 .level-number { background: #E8E0F5; color: #6B3FA0; }

.level-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.level-card .level-subtitle {
  font-size: 0.875rem;
  color: var(--color-neutral-500);
  margin-bottom: var(--space-md);
}

.level-card-body {
  padding: 0 var(--space-lg);
  flex: 1;
}

.level-features {
  list-style: none;
  margin: 0;
}

.level-features li {
  padding: var(--space-sm) 0;
  font-size: 0.875rem;
  color: var(--color-neutral-700);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.level-features li::before {
  content: '✓';
  color: var(--color-secondary-500);
  font-weight: 700;
}

.level-card-footer {
  padding: var(--space-md) var(--space-lg) var(--space-lg);
  border-top: 1px solid var(--color-neutral-100);
  margin-top: var(--space-md);
}

.level-price {
  display: flex;
  align-items: baseline;
  gap: var(--space-xs);
  margin-bottom: var(--space-sm);
}

.level-price-amount {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary-900);
}

.level-price-period {
  font-size: 0.875rem;
  color: var(--color-neutral-500);
}

.level-setup {
  font-size: 0.75rem;
  color: var(--color-neutral-500);
  margin-bottom: var(--space-md);
}

/* Level card accent borders */
.level-1 { border-top: 4px solid var(--color-primary-500); }
.level-2 { border-top: 4px solid var(--color-secondary-500); }
.level-3 { border-top: 4px solid var(--color-accent-400); }
.level-4 { border-top: 4px solid #6B3FA0; }

/* Most popular badge */
.level-card.popular {
  transform: scale(1.04);
  box-shadow: var(--shadow-lg);
}

.level-card.popular:hover {
  transform: scale(1.04) translateY(-4px);
}

.popular-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--color-accent-400);
  color: var(--color-neutral-900);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

/* ============================================================
   10. FEATURES / BENEFITS SECTION
   ============================================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.feature-card {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
}

.feature-card .card-icon {
  margin: 0 auto var(--space-md);
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--color-neutral-500);
}

/* ============================================================
   11. TESTIMONIALS
   ============================================================ */
.testimonial-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-neutral-100);
}

.testimonial-content {
  font-size: 1rem;
  font-style: italic;
  color: var(--color-neutral-700);
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}

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

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-primary-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--color-primary-700);
  font-size: 1.125rem;
}

.testimonial-name {
  font-weight: 600;
  font-size: 0.9375rem;
}

.testimonial-role {
  font-size: 0.8125rem;
  color: var(--color-neutral-500);
}

/* ============================================================
   12. CTA (CALL TO ACTION) SECTIONS
   ============================================================ */
.cta-section {
  text-align: center;
  padding: var(--space-4xl) 0;
  background: linear-gradient(135deg, var(--color-primary-900), var(--color-primary-700));
  color: var(--color-white);
}

.cta-section h2 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.cta-section p {
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
  font-size: 1.125rem;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ============================================================
   13. FOOTER
   ============================================================ */
.footer {
  background: var(--color-primary-900);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand p {
  font-size: 0.9375rem;
  margin-top: var(--space-md);
  max-width: 320px;
}

.footer-heading {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.6);
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: 0.875rem;
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-bottom-links a {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.8125rem;
}

.footer-bottom-links a:hover {
  color: var(--color-white);
}

/* ============================================================
   14. SECTION TITLES
   ============================================================ */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-3xl);
}

.section-header h2 {
  margin-bottom: var(--space-md);
}

.section-header p {
  font-size: 1.125rem;
  color: var(--color-neutral-500);
}

.section-label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-secondary-500);
  margin-bottom: var(--space-md);
}

/* ============================================================
   15. HOW IT WORKS / STEPS
   ============================================================ */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2xl);
  position: relative;
}

.step {
  text-align: center;
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--color-primary-700);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto var(--space-md);
}

.step h3 {
  margin-bottom: var(--space-sm);
}

.step p {
  color: var(--color-neutral-500);
  font-size: 0.9375rem;
}

/* ============================================================
   16. RESPONSIVE BREAKPOINTS
   ============================================================ */

/* Tablet: 768px - 1024px */
@media (max-width: 1024px) {
  h1 { font-size: 2.75rem; }
  h2 { font-size: 2rem; }
  
  .level-cards { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* Mobile: <768px */
@media (max-width: 768px) {
  :root { --content-padding: 16px; }
  
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.375rem; }

  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .level-cards { grid-template-columns: 1fr; }
  
  .level-card.popular {
    transform: none;
  }
  .level-card.popular:hover {
    transform: translateY(-4px);
  }

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

  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }

  /* Mobile nav toggle */
  .mobile-menu-toggle { display: block; }
  .nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-neutral-100);
    box-shadow: var(--shadow-lg);
  }
  .nav.open { display: flex; }

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

  .hero-actions { flex-direction: column; }
  .cta-actions { flex-direction: column; align-items: center; }
}

/* Small mobile: <480px */
@media (max-width: 480px) {
  h1 { font-size: 1.875rem; }
  .grid-4 { grid-template-columns: 1fr; }
}

/* ============================================================
   17. UTILITY CLASSES
   ============================================================ */
.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }

.flex { display: flex; }
.flex-center   { display: flex; align-items: center; justify-content: center; }
.flex-between  { display: flex; align-items: center; justify-content: space-between; }
.flex-col      { flex-direction: column; }
.flex-wrap     { flex-wrap: wrap; }
.gap-xs  { gap: var(--space-xs); }
.gap-sm  { gap: var(--space-sm); }
.gap-md  { gap: var(--space-md); }
.gap-lg  { gap: var(--space-lg); }
.gap-xl  { gap: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.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;
}

/* Animation */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Form input focus */
.form-input:focus {
  border-color: var(--color-secondary-500) !important;
  box-shadow: 0 0 0 3px rgba(46, 191, 170, 0.15) !important;
  outline: none;
}

/* Alpine pattern background */
.bg-pattern {
  background-image: 
    radial-gradient(ellipse at 20% 50%, rgba(46, 191, 170, 0.05) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, rgba(232, 168, 56, 0.03) 0%, transparent 50%);
}