/**
 * Rausku Landing Page - Main Stylesheet
 * Theme: Mecha Fish AI Assistant — Sharp and Calm
 * 
 * This is the main entry point that imports all other stylesheets.
 * Structure: Base → Layout → Components → Utilities
 */

/* ========================================
   IMPORTS - Design System Foundation
   ======================================== */
@import url('design-tokens.css');
@import url('animations.css');
@import url('components.css');
@import url('responsive.css');
@import url('grid-system.css');

/* ========================================
   CSS CUSTOM PROPERTIES - Page Specific
   ======================================== */
:root {
  /* Hero specific variables */
  --hero-min-height: 100vh;
  --hero-min-height-mobile: 100dvh;
  --hero-padding-top: 6rem;
  
  /* Section spacing */
  --section-padding-y: var(--space-20);
  --section-padding-y-mobile: var(--space-16);
  
  /* Container padding */
  --container-padding-x: var(--space-4);
  --container-padding-x-md: var(--space-8);
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-normal);
  color: var(--color-foam);
  background-color: var(--color-deep);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Smooth scrolling with offset for fixed navbar */
html {
  scroll-padding-top: 5rem;
}

/* Selection colors */
::selection {
  background: rgba(14, 165, 233, 0.3);
  color: var(--color-foam);
}

::-moz-selection {
  background: rgba(14, 165, 233, 0.3);
  color: var(--color-foam);
}

/* ========================================
   TYPOGRAPHY - Enhanced
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--color-foam);
}

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

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-bio-glow);
}

a:focus-visible {
  outline: 2px solid var(--color-bio-glow);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Text gradient utility */
.text-gradient {
  background: var(--gradient-fish);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========================================
   LAYOUT - Container System
   ======================================== */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding-x);
  padding-right: var(--container-padding-x);
}

.container-narrow {
  max-width: var(--container-md);
}

.container-wide {
  max-width: var(--container-max);
}

.container-fluid {
  width: 100%;
  padding-left: var(--container-padding-x);
  padding-right: var(--container-padding-x);
}

/* ========================================
   SECTION BASE
   ======================================== */
.section {
  padding: var(--section-padding-y-mobile) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-10);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section-label {
  display: inline-block;
  font-size: var(--text-tiny);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  padding: var(--space-1) var(--space-3);
  background: rgba(14, 165, 233, 0.1);
  border-radius: var(--radius-full);
  border: 1px solid rgba(14, 165, 233, 0.2);
}

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

.section-description {
  color: var(--color-chrome);
  font-size: var(--text-body-lg);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ========================================
   GLASSMORPHISM UTILITIES
   ======================================== */
.glass {
  background: rgba(30, 41, 59, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(148, 163, 184, 0.15);
}

.glass-dark {
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(148, 163, 184, 0.1);
}

.glass-light {
  background: rgba(248, 250, 252, 0.05);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ========================================
   GLOW EFFECTS
   ======================================== */
.glow {
  box-shadow: var(--shadow-glow-sm);
}

.glow-md {
  box-shadow: var(--shadow-glow-md);
}

.glow-lg {
  box-shadow: var(--shadow-glow-lg);
}

.glow-hover {
  transition: box-shadow var(--transition-normal);
}

.glow-hover:hover {
  box-shadow: var(--shadow-glow-md);
}

.glow-text {
  text-shadow: 0 0 20px rgba(34, 211, 238, 0.5);
}

/* ========================================
   CLIP-PATH EFFECTS
   ======================================== */
.clip-fish {
  clip-path: polygon(
    0% 50%,
    15% 15%,
    50% 0%,
    85% 15%,
    100% 50%,
    85% 85%,
    50% 100%,
    15% 85%
  );
}

.clip-wave {
  clip-path: polygon(
    0% 0%,
    100% 0%,
    100% 85%,
    75% 100%,
    50% 85%,
    25% 100%,
    0% 85%
  );
}

/* ========================================
   ACCESSIBILITY
   ======================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: var(--color-deep);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-weight: var(--font-semibold);
  z-index: calc(var(--z-navbar) + 1);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-bio-glow);
  outline-offset: 2px;
}

/* ========================================
   SCROLLBAR STYLING
   ======================================== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-deep);
}

::-webkit-scrollbar-thumb {
  background: var(--color-metal);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-metal-light);
}

/* ========================================
   LOADING STATES
   ======================================== */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-metal-dark) 25%,
    var(--color-metal) 50%,
    var(--color-metal-dark) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* ========================================
   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;
  }
}

/* ========================================
   HIGH CONTRAST MODE
   ======================================== */
@media (prefers-contrast: high) {
  .glass,
  .glass-dark,
  .glass-light {
    border-width: 2px;
  }
  
  .btn {
    border: 2px solid currentColor;
  }
}

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {
  .no-print,
  .navbar,
  .hero-visual,
  .social-links {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  a {
    color: black;
    text-decoration: underline;
  }
}