/* ============================================
   REVO ENDÜSTRI – MAIN CSS
   Theme, Reset, Typography, Layout
   ============================================ */

/* --- CSS Custom Properties (Theme) --- */
:root {
  /* Colors */
  --bg-primary: #050508;
  --bg-secondary: #0a0a10;
  --bg-surface: #0d0d14;
  --bg-surface-hover: #12121c;
  --bg-glass: rgba(13, 13, 20, 0.7);
  --bg-glass-hover: rgba(13, 13, 20, 0.85);

  --color-primary: #00d4ff;
  --color-primary-dim: rgba(0, 212, 255, 0.15);
  --color-primary-glow: rgba(0, 212, 255, 0.4);
  --color-secondary: #00ff88;
  --color-secondary-dim: rgba(0, 255, 136, 0.15);
  --color-accent: #6c63ff;
  --color-accent-dim: rgba(108, 99, 255, 0.15);

  --text-primary: #ffffff;
  --text-secondary: #a0a0b8;
  --text-muted: #606078;
  --text-on-primary: #050508;

  --border-color: rgba(255, 255, 255, 0.06);
  --border-glow: rgba(0, 212, 255, 0.3);

  /* Typography */
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing */
  --section-padding: 120px;
  --container-width: 1280px;
  --container-padding: 24px;

  /* Borders */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

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

  /* Shadows */
  --shadow-glow-sm: 0 0 15px var(--color-primary-dim);
  --shadow-glow-md: 0 0 30px var(--color-primary-dim), 0 0 60px rgba(0, 212, 255, 0.08);
  --shadow-glow-lg: 0 0 40px var(--color-primary-glow), 0 0 80px rgba(0, 212, 255, 0.15);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);

  /* Navbar */
  --navbar-height: 72px;

  /* Z-index layers */
  --z-plexus: 0;
  --z-content: 1;
  --z-navbar: 100;
  --z-modal: 200;
  --z-lightbox: 300;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 16px;
  overflow-x: hidden;
  max-width: 100vw;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  max-width: 100vw;
  min-height: 100vh;
}

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

a:hover {
  color: var(--color-secondary);
}

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  letter-spacing: -0.02em;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.01em;
}

h4 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

p {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 1rem;
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-glow {
  text-shadow: 0 0 20px var(--color-primary-glow), 0 0 40px rgba(0, 212, 255, 0.1);
}

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

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--section-padding) 0;
  position: relative;
  z-index: var(--z-content);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header h2 {
  margin-bottom: 16px;
}

.section-header p {
  max-width: 640px;
  margin: 0 auto;
  font-size: 1.1rem;
}

.section-label {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 12px;
  padding: 6px 16px;
  background: var(--color-primary-dim);
  border: 1px solid rgba(0, 212, 255, 0.15);
  border-radius: 100px;
}

/* Grid helpers */
.grid {
  display: grid;
  gap: 24px;
}

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

.flex {
  display: flex;
}

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

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

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

.overflow-hidden {
  overflow: hidden;
}

/* Divider line */
.divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
  margin: 0;
}

/* Selection color */
::selection {
  background: var(--color-primary);
  color: var(--text-on-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-surface-hover);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Plexus canvas container */
#plexus-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: var(--z-plexus);
  pointer-events: none;
}