/* Defines shared visual styles for the application. */

:root {
  color-scheme: dark;

  /* Color palette */
  --color-background: #070a14;
  --color-surface: #10162a;
  --color-surface-elevated: #171f38;
  --color-primary: #5b8cff;
  --color-secondary: #a879ff;
  --color-accent: #21e6d0;
  --color-success: #45dc93;
  --color-warning: #ffbf5b;
  --color-error: #ff657c;
  --color-text-primary: #f4f7ff;
  --color-text-secondary: #a9b4cf;
  --color-border: #2a3659;
  --color-glow-primary: rgb(91 140 255 / 55%);
  --color-glow-secondary: rgb(168 121 255 / 50%);
  --color-glow-accent: rgb(33 230 208 / 45%);

  /* Typography */
  --font-family-sans: "Inter", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-family-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing */
  --space-0: 0;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Shape and elevation */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  --shadow-sm: 0 2px 8px rgb(0 0 0 / 20%);
  --shadow-md: 0 8px 24px rgb(0 0 0 / 28%);
  --shadow-lg: 0 16px 40px rgb(0 0 0 / 36%);
  --shadow-xl: 0 24px 64px rgb(0 0 0 / 45%);
  --glow-sm: 0 0 12px var(--color-glow-primary);
  --glow-md: 0 0 24px var(--color-glow-primary);
  --glow-lg: 0 0 40px var(--color-glow-primary);
  --glow-accent: 0 0 24px var(--color-glow-accent);

  /* Motion */
  --duration-instant: 100ms;
  --duration-fast: 160ms;
  --duration-normal: 240ms;
  --duration-slow: 400ms;
  --duration-slower: 700ms;
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --ease-emphasized: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-decelerate: cubic-bezier(0, 0, 0.2, 1);
  --ease-accelerate: cubic-bezier(0.4, 0, 1, 1);

  /* Layering */
  --z-index-base: 0;
  --z-index-raised: 10;
  --z-index-dropdown: 100;
  --z-index-sticky: 200;
  --z-index-overlay: 300;
  --z-index-modal: 400;
  --z-index-toast: 500;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 100%;
}

body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
ol,
ul,
figure {
  margin: 0;
}

ol,
ul {
  padding: 0;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  border: 0;
  padding: 0;
}

img,
svg {
  display: block;
}

body {
  margin: 0;
  background-color: var(--color-background);
  color: var(--color-text-primary);
  font-family: var(--font-family-sans);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

:root {
  /* Content constraints */
  --container-xs: 20rem;
  --container-sm: 30rem;
  --container-md: 42rem;
  --container-lg: 64rem;
  --container-xl: 76rem;
  --container-2xl: 90rem;

  /* Visual effects */
  --blur-sm: 0.25rem;
  --blur-md: 0.75rem;
  --blur-lg: 1.25rem;
  --opacity-disabled: 0.4;
  --opacity-muted: 0.68;
  --opacity-hover: 0.88;
  --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  --gradient-space: linear-gradient(135deg, var(--color-background), var(--color-surface-elevated));
  --gradient-glow: radial-gradient(circle, var(--color-glow-accent), transparent 70%);
  --focus-ring: 0 0 0 3px var(--color-glow-accent);

  /* Type refinement */
  --letter-spacing-default: 0;
  --letter-spacing-display: 0;
  --letter-spacing-label: 0;
}

html {
  scrollbar-color: var(--color-border) var(--color-background);
  scrollbar-width: thin;
}

::-webkit-scrollbar {
  width: 0.75rem;
  height: 0.75rem;
}

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

::-webkit-scrollbar-thumb {
  border: 3px solid var(--color-background);
  border-radius: var(--radius-full);
  background-color: var(--color-border);
}

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

::selection {
  background-color: var(--color-glow-primary);
  color: var(--color-text-primary);
}

a {
  color: inherit;
}

button,
select,
input,
textarea {
  color: inherit;
}

button:not(:disabled),
select:not(:disabled),
input:not(:disabled),
textarea:not(:disabled) {
  cursor: pointer;
}

input:not([type="checkbox"]):not([type="radio"]),
textarea {
  cursor: text;
}

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

[hidden] {
  display: none !important;
}

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