/* ============================================
   DESIGN SYSTEM — Neon Mint Dark Theme
   Presentation: Грокаем алгоритмы
   ============================================ */

:root {
  /* --- Background --- */
  --bg-primary: #111827;
  --bg-surface: #1F2937;
  --bg-surface-2: #374151;
  --bg-code: #030712;

  /* --- Accent (Mint) --- */
  --accent: #34D399;
  --accent-light: rgba(52, 211, 153, 0.15);
  --accent-border: rgba(52, 211, 153, 0.35);
  --accent-hover: #10B981;

  /* --- Text --- */
  --text-primary: #F9FAFB;
  --text-secondary: #9CA3AF;
  --text-muted: #6B7280;
  --text-on-code: #CDD6F4;
  --text-on-accent: #030712;

  /* --- Borders --- */
  --border: rgba(255, 255, 255, 0.1);
  --border-light: rgba(255, 255, 255, 0.05);

  /* --- Semantic --- */
  --success: #84CC16;
  --success-light: rgba(132, 204, 22, 0.12);
  --error: #FB7185;
  --error-light: rgba(251, 113, 133, 0.12);
  --info: #22D3EE;
  --info-light: rgba(34, 211, 238, 0.12);

  /* --- Glassmorphism --- */
  --glass-bg: rgba(31, 41, 55, 0.75);
  --glass-blur: blur(20px);
  --glass-border: rgba(255, 255, 255, 0.08);

  /* --- Shadows --- */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);

  /* --- Radius --- */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* --- Transitions --- */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.6s ease-out;

  /* --- Motion profile (default) --- */
  --motion-viz-stage-exit-duration: 90;
  --motion-viz-stage-enter-duration: 240;
  --motion-viz-stage-exit-opacity: 0.28;
  --motion-viz-stage-enter-opacity: 0.62;
  --motion-viz-stage-exit-y: -3;
  --motion-viz-stage-enter-y: 4;
  --motion-viz-stage-exit-easing: cubic-bezier(0.4, 0, 1, 1);
  --motion-viz-stage-enter-easing: cubic-bezier(0.22, 1, 0.36, 1);
  --motion-viz-minheight-duration: 0.3s;
  --motion-viz-minheight-easing: ease;
  --motion-viz-line-duration: 0.7s;
  --motion-viz-line-easing: ease;
  --motion-viz-bars-duration: 1.2s;
  --motion-viz-bars-easing: cubic-bezier(0.16, 1, 0.3, 1);
  --motion-viz-race-duration: 1.5s;
  --motion-viz-race-easing: cubic-bezier(0.16, 1, 0.3, 1);
  --motion-viz-queue-pop-duration: 0.24s;
  --motion-viz-queue-pop-easing: ease-out;

  /* --- Interactive layout tokens --- */
  --interactive-max-width: 720px;
  --interactive-options-max-width: 680px;
  --interactive-top-gap: 14px;
  --interactive-option-padding-y: 10px;
  --interactive-option-padding-x: 16px;
  --interactive-option-font-size: 0.88rem;
}

/* Motion profiles for reusable tuning: soft | default | snappy */
html[data-motion-profile='soft'] {
  --motion-viz-stage-exit-duration: 120;
  --motion-viz-stage-enter-duration: 340;
  --motion-viz-stage-exit-opacity: 0.34;
  --motion-viz-stage-enter-opacity: 0.72;
  --motion-viz-stage-exit-y: -2;
  --motion-viz-stage-enter-y: 3;
  --motion-viz-stage-exit-easing: cubic-bezier(0.32, 0, 0.67, 0);
  --motion-viz-stage-enter-easing: cubic-bezier(0.22, 1, 0.36, 1);
  --motion-viz-minheight-duration: 0.38s;
  --motion-viz-line-duration: 0.88s;
  --motion-viz-bars-duration: 1.35s;
  --motion-viz-bars-easing: cubic-bezier(0.22, 1, 0.36, 1);
  --motion-viz-race-duration: 1.75s;
  --motion-viz-race-easing: cubic-bezier(0.22, 1, 0.36, 1);
  --motion-viz-queue-pop-duration: 0.3s;
  --motion-viz-queue-pop-easing: ease-out;
}

html[data-motion-profile='snappy'] {
  --motion-viz-stage-exit-duration: 70;
  --motion-viz-stage-enter-duration: 180;
  --motion-viz-stage-exit-opacity: 0.22;
  --motion-viz-stage-enter-opacity: 0.56;
  --motion-viz-stage-exit-y: -4;
  --motion-viz-stage-enter-y: 5;
  --motion-viz-stage-exit-easing: cubic-bezier(0.4, 0, 1, 1);
  --motion-viz-stage-enter-easing: cubic-bezier(0.16, 1, 0.3, 1);
  --motion-viz-minheight-duration: 0.22s;
  --motion-viz-line-duration: 0.5s;
  --motion-viz-bars-duration: 0.95s;
  --motion-viz-bars-easing: cubic-bezier(0.16, 1, 0.3, 1);
  --motion-viz-race-duration: 1.1s;
  --motion-viz-race-easing: cubic-bezier(0.16, 1, 0.3, 1);
  --motion-viz-queue-pop-duration: 0.16s;
  --motion-viz-queue-pop-easing: ease-out;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Rubik', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 400;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: 'Manrope', sans-serif;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

h1 {
  font-size: clamp(2rem, 4.5vw, 2.75rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 600;
}

h3 {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  font-weight: 600;
}

p, li {
  font-size: clamp(0.95rem, 1.5vw, 1.125rem);
  color: var(--text-secondary);
}

code, pre {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

/* --- Inline code --- */
code:not(pre code) {
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.875em;
  color: var(--accent);
}

/* --- Accent badge (small label) --- */
.badge {
  display: inline-block;
  font-family: 'Rubik', sans-serif;
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 12px;
  border-radius: 100px;
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  color: var(--accent);
}

.badge--success {
  background: var(--success-light);
  border-color: var(--success);
  color: var(--success);
}

.badge--error {
  background: var(--error-light);
  border-color: var(--error);
  color: var(--error);
}

.badge--info {
  background: var(--info-light);
  border-color: var(--info);
  color: var(--info);
}

/* --- Glassmorphism card --- */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
}

/* --- Accent text highlight --- */
.accent {
  color: var(--accent);
  font-weight: 600;
}

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