/* ========================================
   HEEMS HOLDINGS LLC - DESIGN SYSTEM
   Inspired by Blackstone Real Estate
   ======================================== */

/* CSS Custom Properties - Design Tokens */
:root {
  /* Colors */
  --bg-primary: #0B0D10;
  --bg-secondary: #111317;
  --surface: #15181C;
  --text-primary: #FFFFFF;
  --text-secondary: #D9DBE1;
  --text-muted: #A5A9B3;
  --border: #2A2F36;
  --accent-1: #9AA4B2;
  --accent-callout: #E5E7EB;
  
  /* Typography Scale (rem) */
  --font-sans: ui-sans-serif, -apple-system, 'Segoe UI', Roboto, Inter, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, 'SFMono-Regular', Menlo, Monaco, Consolas, 'Liberation Mono', monospace;
  
  --text-h1: 3.5rem;
  --text-h2: 2.25rem;
  --text-h3: 1.5rem;
  --text-h4: 1.25rem;
  --text-lg: 1.125rem;
  --text-body: 1rem;
  --text-caption: 0.875rem;
  
  /* Font Weights */
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  
  /* Letter Spacing */
  --tracking-tight: -0.01em;
  --tracking-normal: 0;
  --tracking-wide: 0.02em;
  
  /* Line Heights */
  --leading-display: 1.1;
  --leading-heading: 1.2;
  --leading-body: 1.6;
  
  /* Spacing Scale */
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-5: 1.25rem;  /* 20px */
  --space-6: 1.5rem;   /* 24px */
  --space-8: 2rem;     /* 32px */
  --space-10: 2.5rem;  /* 40px */
  --space-12: 3rem;    /* 48px */
  --space-16: 4rem;    /* 64px */
  --space-20: 5rem;    /* 80px */
  --space-24: 6rem;    /* 96px */
  
  /* Container */
  --container-max: 1280px;
  --gutter: 1.5rem; /* 24px */
  
  /* Elevation */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.28);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.32);
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-base: 250ms ease-out;
  --transition-slow: 350ms ease-out;
}

/* Reset & Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-feature-settings: "kern" 1;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-weight: var(--weight-regular);
  line-height: var(--leading-body);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-semibold);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}

h1 { font-size: var(--text-h1); line-height: var(--leading-display); }
h2 { font-size: var(--text-h2); }
h3 { font-size: var(--text-h3); }
h4 { font-size: var(--text-h4); }

p {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

.text-muted { color: var(--text-muted); }
.text-large { font-size: var(--text-lg); }
.text-caption { font-size: var(--text-caption); }

.overline {
  font-size: 0.75rem;
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-muted);
}

/* Layout Utilities */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section {
  padding: var(--space-16) 0;
}

.section-lg {
  padding: var(--space-24) 0;
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-cols-1 { grid-template-columns: 1fr; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Flexbox Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Button Component */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: var(--radius-lg);
  font-family: inherit;
  font-weight: var(--weight-medium);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--accent-callout);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-caption);
  height: 2rem;
}

.btn-md {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-body);
  height: 2.75rem;
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
  height: 3.5rem;
}

/* Button Variants */
.btn-solid {
  background-color: var(--text-primary);
  color: var(--bg-primary);
}

.btn-solid:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

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

.btn-ghost:hover {
  background-color: var(--surface);
  border-color: var(--accent-1);
}

.btn-link {
  background-color: transparent;
  color: var(--text-secondary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.btn-link:hover {
  color: var(--text-primary);
}

/* Navigation Header */
.nav-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(11, 13, 16, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.nav-logo {
  font-size: var(--text-h4);
  font-weight: var(--weight-bold);
  color: var(--text-primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--space-8);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: var(--weight-medium);
  transition: color var(--transition-base);
  position: relative;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--text-primary);
}

/* Mobile Menu */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}

.hero-media {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(0,0,0,0.8), rgba(0,0,0,0.2));
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  padding: var(--space-12) 0;
  width: 100%;
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-6);
  max-width: 800px;
}

.hero p {
  font-size: var(--text-lg);
  margin-bottom: var(--space-8);
  max-width: 600px;
}

/* Stats Band */
.stats-band {
  background-color: var(--bg-secondary);
  padding: var(--space-16) 0;
}

.stat-card {
  text-align: center;
  padding: var(--space-6);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background-color: var(--surface);
}

.stat-value {
  font-size: 3rem;
  font-weight: var(--weight-bold);
  font-feature-settings: "tnum", "tabular-nums";
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--text-caption);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-muted);
}

/* Section Header */
.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section-header .overline {
  margin-bottom: var(--space-4);
}

.section-header h2 {
  margin-bottom: var(--space-6);
}

.section-header p {
  font-size: var(--text-lg);
  max-width: 70ch;
  margin: 0 auto;
}

/* Media Card */
.media-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--surface);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.media-card-image {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.media-card-content {
  padding: var(--space-6);
}

.media-card h4 {
  margin-bottom: var(--space-3);
}

.media-card p {
  margin-bottom: var(--space-4);
}

/* Quote Slider */
.quote-slider {
  background-color: var(--bg-secondary);
  padding: var(--space-20) 0;
  text-align: center;
}

.quote-content {
  max-width: 800px;
  margin: 0 auto;
}

.quote-text {
  font-size: var(--text-h3);
  font-weight: var(--weight-medium);
  line-height: var(--leading-heading);
  color: var(--text-primary);
  margin-bottom: var(--space-8);
}

.quote-author {
  font-weight: var(--weight-semibold);
  color: var(--text-secondary);
}

/* Footer */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
  margin-bottom: var(--space-12);
}

.footer-section h4 {
  font-size: var(--text-body);
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

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

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: var(--text-caption);
}

/* Animations & Scroll Effects */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Scroll-triggered animations */
.animate-fade-in-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-fade-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-slide-down {
  opacity: 0;
  transform: translateY(-30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

/* Revealed state */
.animate-fade-in-up.revealed,
.animate-fade-in-left.revealed,
.animate-fade-in-right.revealed,
.animate-scale-in.revealed,
.animate-slide-down.revealed {
  opacity: 1;
  transform: translate(0) scale(1);
}

/* Staggered animations */
.animate-stagger > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-stagger.revealed > *:nth-child(1) { 
  transition-delay: 0ms; 
  opacity: 1;
  transform: translateY(0);
}
.animate-stagger.revealed > *:nth-child(2) { 
  transition-delay: 100ms; 
  opacity: 1;
  transform: translateY(0);
}
.animate-stagger.revealed > *:nth-child(3) { 
  transition-delay: 200ms; 
  opacity: 1;
  transform: translateY(0);
}
.animate-stagger.revealed > *:nth-child(4) { 
  transition-delay: 300ms; 
  opacity: 1;
  transform: translateY(0);
}
.animate-stagger.revealed > *:nth-child(5) { 
  transition-delay: 400ms; 
  opacity: 1;
  transform: translateY(0);
}
.animate-stagger.revealed > *:nth-child(6) { 
  transition-delay: 500ms; 
  opacity: 1;
  transform: translateY(0);
}

/* Parallax Effects */
.parallax-element {
  will-change: transform;
}

.parallax-slow {
  transform: translateY(var(--parallax-y-slow, 0));
}

.parallax-medium {
  transform: translateY(var(--parallax-y-medium, 0));
}

.parallax-fast {
  transform: translateY(var(--parallax-y-fast, 0));
}

/* Scroll-triggered background changes */
.scroll-bg-change {
  transition: background-color 0.3s ease-out;
}

/* Enhanced hover effects for scroll */
.scroll-hover-lift {
  transition: transform 0.3s ease-out, box-shadow 0.3s ease-out;
}

.scroll-hover-lift:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

/* Scroll progress indicator */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--text-primary), var(--accent-1));
  z-index: 1000;
  transition: width 0.1s ease-out;
}

/* Smooth reveal for images */
.image-reveal {
  overflow: hidden;
  position: relative;
}

.image-reveal img {
  transition: transform 0.8s ease-out, filter 0.8s ease-out;
  transform: scale(1.1);
  filter: blur(2px);
}

.image-reveal.revealed img {
  transform: scale(1);
  filter: blur(0);
}

/* Text reveal animation */
.text-reveal {
  overflow: hidden;
  position: relative;
}

.text-reveal-content {
  display: inline-block;
  transform: translateY(100%);
  transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.text-reveal.revealed .text-reveal-content {
  transform: translateY(0);
}

/* Number counter animation enhancement */
.counter-animate {
  font-feature-settings: "tnum", "tabular-nums";
  transition: color 0.3s ease-out;
}

.counter-animate.counting {
  color: var(--accent-1);
}

/* Scroll-based section highlighting */
.section-highlight {
  transition: background-color 0.5s ease-out;
}

.section-highlight.in-view {
  background-color: var(--bg-secondary);
}

/* Advanced media card animations */
.media-card {
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), 
              box-shadow 0.4s ease-out,
              filter 0.4s ease-out;
}

.media-card:hover {
  transform: translateY(-12px) scale(1.02);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  filter: brightness(1.1);
}

.media-card-image {
  transition: transform 0.6s ease-out;
}

.media-card:hover .media-card-image {
  transform: scale(1.1);
}

/* Smooth section transitions */
.section-transition {
  position: relative;
  z-index: 1;
}

.section-transition::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  opacity: 0;
  transition: opacity 0.5s ease-out;
}

.section-transition.in-view::before {
  opacity: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .nav-toggle {
    display: block;
  }
  
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
  
  .hero-content {
    padding: var(--space-8) 0;
  }
  
  .section {
    padding: var(--space-12) 0;
  }
  
  .section-lg {
    padding: var(--space-16) 0;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Focus Styles for Accessibility */
:focus-visible {
  outline: 2px solid var(--accent-callout);
  outline-offset: 2px;
}

/* Skip to Content Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 8px;
  text-decoration: none;
  z-index: 1000;
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  top: 6px;
}