/* ============================================
   ALTITUDE LOGIC - SHARED STYLESHEET
   ============================================ */

/* CSS Custom Properties */
:root {
  --deep-slate: #0F1724;
  --signal-blue: #0EA5E9;
  --ice-white: #F0F4F8;
  --steel-gray: #64748B;
  --midnight: #1E293B;
  --cyan-pulse: #22D3EE;
  --warm-white: #FAFAFA;

  /* Additional derived colors */
  --bg-dark: var(--deep-slate);
  --text-primary: var(--ice-white);
  --text-secondary: var(--steel-gray);
  --accent: var(--signal-blue);
  --accent-light: var(--cyan-pulse);
  --bg-card: var(--midnight);

  /* Typography */
  --font-display: 'Satoshi', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;

  /* Animation */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 400ms ease-in-out;
}

/* ============================================
   CSS RESET & BASE STYLES
   ============================================ */

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

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  position: relative;
}

/* Grid dot background pattern */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle, rgba(34, 211, 238, 0.05) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: -1;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--accent-light);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
}

h1 {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  letter-spacing: -0.02em;
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  line-height: 1.7;
}

p + p {
  margin-top: var(--spacing-md);
}

/* ============================================
   COLOR HIGHLIGHTS — Key Feature
   ============================================ */

.highlight {
  color: var(--signal-blue);
}

.highlight-cyan {
  color: var(--cyan-pulse);
}

/* ============================================
   NAVIGATION BAR
   ============================================ */

nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(15, 23, 36, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(34, 211, 238, 0.1);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  text-decoration: none;
  transition: opacity var(--transition-base);
}

.nav-brand:hover {
  opacity: 0.8;
}

.nav-logo {
  width: 32px;
  height: 32px;
  color: var(--accent);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-2xl);
  align-items: center;
}

.nav-links a {
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-base);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent);
  transition: width var(--transition-base);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  background-color: var(--accent);
  color: var(--bg-dark) !important;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.nav-cta:hover {
  background-color: var(--accent-light);
  color: var(--bg-dark) !important;
}

.nav-cta::after {
  display: none !important;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--spacing-sm);
  gap: var(--spacing-sm);
}

/* ============================================
   FOOTER
   ============================================ */

footer {
  background-color: var(--midnight);
  border-top: 1px solid rgba(34, 211, 238, 0.1);
  padding: var(--spacing-3xl) var(--spacing-xl);
  margin-top: var(--spacing-4xl);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
  font-size: 1rem;
  margin-bottom: var(--spacing-md);
  color: var(--accent);
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: var(--spacing-sm);
}

.footer-section a {
  color: var(--text-secondary);
  transition: color var(--transition-base);
}

.footer-section a:hover {
  color: var(--accent);
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: var(--spacing-2xl);
  border-top: 1px solid rgba(34, 211, 238, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer-logo {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* ============================================
   CONTAINER & SECTIONS
   ============================================ */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

section {
  padding: var(--spacing-4xl) var(--spacing-xl);
}

section:first-of-type {
  padding-top: calc(var(--spacing-4xl) * 1.5);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: 0.5rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: var(--accent-light);
  color: var(--bg-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(34, 211, 238, 0.2);
}

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

.btn-secondary:hover {
  background-color: rgba(14, 165, 233, 0.1);
  color: var(--accent-light);
  border-color: var(--accent-light);
}

.btn-text {
  display: inline;
  padding: 0;
  color: var(--accent);
  font-weight: 600;
  font-size: 1rem;
  position: relative;
}

.btn-text::after {
  content: '';
  margin-left: 0;
  transition: margin-left var(--transition-base);
}

.btn-text:hover {
  color: var(--accent-light);
}

/* ============================================
   HERO SECTION — Left-Aligned Messaging
   ============================================ */

.hero {
  position: relative;
  padding: calc(var(--spacing-4xl) * 1.5) var(--spacing-xl);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
    ellipse at 20% 50%,
    rgba(14, 165, 233, 0.12) 0%,
    rgba(34, 211, 238, 0.04) 40%,
    transparent 70%
  );
  pointer-events: none;
}

/* Left-aligned hero variant */
.hero-left {
  text-align: left;
}

.hero-left .hero-content,
.hero-content-left {
  position: relative;
  z-index: 1;
  max-width: 780px;
  text-align: left;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--spacing-lg);
}

.hero h1 {
  margin-bottom: var(--spacing-xl);
  color: var(--text-primary);
  line-height: 1.15;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.8;
}

.hero-ctas,
.hero-ctas-left {
  display: flex;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
  align-items: center;
}

.hero-ctas {
  justify-content: center;
}

.hero-ctas-left {
  justify-content: flex-start;
}

/* Centered hero (for inner pages) */
.hero-center {
  text-align: center;
}

.hero-center .hero-content-left {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.hero-center .hero-ctas-left {
  justify-content: center;
}

/* ============================================
   MESSAGE BLOCKS — Left-Aligned Sections
   ============================================ */

.message-block {
  max-width: 780px;
}

.message-block h2 {
  margin-bottom: var(--spacing-lg);
}

.message-block .lead {
  font-size: 1.2rem;
  color: var(--text-primary);
  line-height: 1.7;
  margin-bottom: var(--spacing-xl);
}

.message-block .body-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.85;
}

/* ============================================
   PRINCIPLES GRID — Numbered Layout
   ============================================ */

.principles-grid {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-3xl);
  max-width: 900px;
}

.principle {
  display: flex;
  gap: var(--spacing-xl);
  align-items: flex-start;
  padding: var(--spacing-xl) 0;
  border-bottom: 1px solid rgba(34, 211, 238, 0.1);
}

.principle:last-child {
  border-bottom: none;
}

.principle-marker {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  opacity: 0.6;
  min-width: 36px;
  padding-top: 0.3rem;
  letter-spacing: 0.05em;
}

.principle-body h3 {
  margin-bottom: var(--spacing-sm);
}

.principle-body p {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 1rem;
}

/* ============================================
   CARD COMPONENTS
   ============================================ */

.card {
  background-color: var(--bg-card);
  border: 1px solid rgba(34, 211, 238, 0.15);
  border-radius: 0.75rem;
  padding: var(--spacing-2xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    rgba(34, 211, 238, 0.05) 0%,
    transparent 100%
  );
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover {
  border-color: rgba(34, 211, 238, 0.4);
  background-color: rgba(30, 41, 59, 0.8);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(34, 211, 238, 0.08);
}

.card:hover::before {
  opacity: 1;
}

.card-content {
  position: relative;
  z-index: 2;
}

.card h3 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.card-list {
  list-style: none;
  margin: var(--spacing-lg) 0;
}

.card-list li {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.card-list li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
  min-width: 24px;
  text-align: center;
}

/* ============================================
   GRID LAYOUTS
   ============================================ */

.grid {
  display: grid;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ============================================
   SECTION STYLING
   ============================================ */

.section-header {
  max-width: 700px;
  margin: 0 auto var(--spacing-3xl);
  text-align: center;
}

.section-header h2 {
  margin-bottom: var(--spacing-lg);
}

.section-header p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.section-dark {
  background-color: var(--midnight);
}

.section-with-accent {
  position: relative;
  background: linear-gradient(
    135deg,
    var(--bg-dark) 0%,
    rgba(30, 41, 59, 0.6) 100%
  );
}

.section-cta {
  border-top: 1px solid rgba(34, 211, 238, 0.08);
}

/* ============================================
   PAGE CONTENT — Inner Pages
   ============================================ */

.page-section {
  max-width: 900px;
}

.page-section h2 {
  color: var(--accent-light);
  margin-bottom: var(--spacing-lg);
}

.page-section .section-intro {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-2xl);
}

.page-section h3 {
  color: var(--accent);
  margin-bottom: var(--spacing-md);
  margin-top: var(--spacing-2xl);
}

.page-section p {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* Step process list */
.step-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2xl);
  max-width: 900px;
}

.step {
  display: flex;
  gap: var(--spacing-xl);
  align-items: flex-start;
}

.step-number {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  opacity: 0.5;
  min-width: 36px;
  padding-top: 0.2rem;
}

.step-body h3 {
  margin-top: 0;
}

/* Accent border cards for "Why This Matters" blocks */
.accent-card {
  padding: var(--spacing-lg);
  background-color: rgba(34, 211, 238, 0.04);
  border-radius: 0.5rem;
  border-left: 3px solid var(--accent);
}

.accent-card h4 {
  color: var(--accent);
  margin-bottom: var(--spacing-sm);
}

.accent-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* ============================================
   FORM STYLING
   ============================================ */

form {
  max-width: 600px;
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
}

input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: 0.5rem;
  background-color: rgba(30, 41, 59, 0.5);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-base);
}

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  background-color: rgba(30, 41, 59, 0.8);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.1);
}

textarea {
  resize: vertical;
  min-height: 150px;
}

.form-submit {
  margin-top: var(--spacing-xl);
}

.success-message {
  background-color: rgba(34, 211, 238, 0.1);
  border: 1px solid var(--accent);
  border-radius: 0.5rem;
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  color: var(--accent-light);
  text-align: center;
  font-weight: 500;
  display: none;
}

.success-message.show {
  display: block;
  animation: slideIn var(--transition-base);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-center {
  text-align: center;
}

.text-accent {
  color: var(--accent);
}

.text-accent-light {
  color: var(--accent-light);
}

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

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mt-xl {
  margin-top: var(--spacing-xl);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mb-xl {
  margin-bottom: var(--spacing-xl);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
  .nav-container {
    padding: var(--spacing-md) var(--spacing-lg);
    gap: var(--spacing-md);
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: var(--spacing-md);
    background-color: rgba(15, 23, 36, 0.98);
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(34, 211, 238, 0.1);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-toggle {
    display: flex;
    flex-direction: column;
  }

  .nav-cta {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.85rem;
  }

  section {
    padding: var(--spacing-2xl) var(--spacing-lg);
  }

  .hero {
    padding: var(--spacing-3xl) var(--spacing-lg);
  }

  .hero-ctas,
  .hero-ctas-left {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .btn {
    width: 100%;
    text-align: center;
  }

  .grid {
    gap: var(--spacing-lg);
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .card {
    padding: var(--spacing-lg);
  }

  .principle {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .step {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  :root {
    font-size: 14px;
  }

  .nav-container {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .nav-brand {
    font-size: 0.95rem;
  }

  section {
    padding: var(--spacing-2xl) var(--spacing-md);
  }

  .hero {
    padding: var(--spacing-2xl) var(--spacing-md);
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }
}