/* 
  Omics Lab — Global Style System (styles.css)
  Author: Antigravity
  Date: May 2026
*/

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,400;0,500;1,400&family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap');

/* ==========================================================================
   1. Theme Variables & Tokens
   ========================================================================== */

:root {
  /* Common Brand Tokens */
  --color-deep-bio-blue: #081F3B;
  --color-cellular-green: #14B8A6;
  --color-graphite: #0A0E13;
  --color-genomics-purple: #7C3AED;
  --color-annotation-gold: #FBBF24;
  --color-expression-red: #EF4444;
  
  --gradient-signature: linear-gradient(135deg, #081F3B 0%, #14B8A6 50%, #7C3AED 100%);
  --gradient-accent: linear-gradient(135deg, var(--color-cellular-green) 0%, var(--color-genomics-purple) 100%);
  --gradient-dark-glow: radial-gradient(circle at top right, rgba(20, 184, 166, 0.15) 0%, rgba(124, 58, 237, 0.05) 50%, transparent 100%);
  --gradient-light-glow: radial-gradient(circle at top right, rgba(20, 184, 166, 0.08) 0%, rgba(124, 58, 237, 0.02) 50%, transparent 100%);

  /* Breakpoints */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;

  /* Global Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  /* Default Theme Settings (Dark Mode Preferred) */
  --bg-primary: #050D1A;
  --bg-secondary: #081F3B;
  --text-primary: #F1F5F9;
  --text-secondary: #CBD5E1;
  --text-muted: #64748B;
  --surface: rgba(8, 31, 59, 0.65);
  --surface-elevated: rgba(13, 40, 75, 0.85);
  --border: rgba(20, 184, 166, 0.18);
  --border-hover: rgba(20, 184, 166, 0.4);
  --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --glow-color: rgba(20, 184, 166, 0.25);
  --body-glow: var(--gradient-dark-glow);
}

/* Light Theme Variables */
:root[data-theme="light"] {
  --bg-primary: #F8FAFC;
  --bg-secondary: #EFF6FF;
  --text-primary: #081F3B;
  --text-secondary: #334155;
  --text-muted: #64748B;
  --surface: rgba(255, 255, 255, 0.85);
  --surface-elevated: #FFFFFF;
  --border: rgba(8, 31, 59, 0.1);
  --border-hover: rgba(20, 184, 166, 0.35);
  --shadow: 0 10px 30px -10px rgba(8, 31, 59, 0.08);
  --glow-color: rgba(20, 184, 166, 0.12);
  --body-glow: var(--gradient-light-glow);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  background-image: var(--body-glow);
  background-attachment: fixed;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ==========================================================================
   2. Typography & Hierarchy
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2.25rem, 5vw, 4rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.35rem, 3vw, 1.75rem);
}

h4 {
  font-size: 1.25rem;
}

p {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.text-large {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.7;
}

a {
  color: var(--color-cellular-green);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-genomics-purple);
}

.mono {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.9em;
  letter-spacing: -0.01em;
}

/* ==========================================================================
   3. Base Layout Helpers
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1360px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 {
  grid-template-columns: 1dfr;
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

.grid-3 {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

@media (min-width: 768px) {
  .grid-4 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.section-padding {
  padding-top: clamp(4rem, 8vw, 8rem);
  padding-bottom: clamp(4rem, 8vw, 8rem);
}

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

.gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ==========================================================================
   4. Skip Link & Screen Reader Helpers
   ========================================================================== */

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-cellular-green);
  color: var(--color-deep-bio-blue);
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-weight: 600;
  z-index: 9999;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

/* ==========================================================================
   5. Selection Colors
   ========================================================================== */

::-webkit-selection {
  background: var(--color-cellular-green);
  color: var(--color-deep-bio-blue);
}

::selection {
  background: var(--color-cellular-green);
  color: var(--color-deep-bio-blue);
}