/* ========================================================================== *
   Variables
   ========================================================================== */

:root {
  /* Colors */
  --color-background: #05060a;
  --color-surface: #0b0e16;
  --color-surface-alt: #101522;
  --color-text: #f5f7ff;
  --color-text-muted: #9ba2c6;
  --color-border-subtle: #1c2335;

  --color-primary: #4b8cff; /* electric blue */
  --color-primary-soft: rgba(75, 140, 255, 0.12);
  --color-primary-strong: #7b9bff;

  --color-success: #2dd97e;
  --color-success-soft: rgba(45, 217, 126, 0.12);
  --color-warning: #ffcc47;
  --color-warning-soft: rgba(255, 204, 71, 0.12);
  --color-danger: #ff4b81;
  --color-danger-soft: rgba(255, 75, 129, 0.12);

  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2933;
  --gray-900: #111827;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    'Helvetica Neue', Arial, sans-serif;
  --font-mono: SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono',
    'Courier New', monospace;

  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-md: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem;  /* 36px */

  --line-height-tight: 1.2;
  --line-height-snug: 1.35;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing scale (px) */
  --space-0: 0;
  --space-1: 2px;
  --space-2: 4px;
  --space-3: 6px;
  --space-4: 8px;
  --space-5: 10px;
  --space-6: 12px;
  --space-8: 16px;
  --space-10: 20px;
  --space-12: 24px;
  --space-16: 32px;
  --space-20: 40px;
  --space-24: 48px;
  --space-32: 64px;
  --space-40: 80px;
  --space-48: 96px;

  /* Radius */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 18px;
  --radius-pill: 999px;

  /* Shadows (subtle neon / depth) */
  --shadow-soft: 0 10px 25px rgba(0, 0, 0, 0.4);
  --shadow-strong: 0 18px 45px rgba(0, 0, 0, 0.7);
  --shadow-glow-primary: 0 0 0 1px rgba(75, 140, 255, 0.35),
    0 0 25px rgba(75, 140, 255, 0.25);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-normal: 180ms ease-out;
  --transition-slow: 260ms ease;

  /* Layout */
  --container-width: 1120px;
  --container-gutter: 20px;
}

@media (min-width: 1280px) {
  :root {
    --container-width: 1200px;
  }
}

/* ========================================================================== *
   Reset / Normalize
   ========================================================================== */

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

html,
body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  min-height: 100vh;
}

h1,
h2,
h3,
h4,
h5,
h6,
p,
figure,
blockquote,
dl,
dd {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

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

button {
  border: none;
  background: none;
  padding: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

/* Remove default focus outline; we'll reintroduce via :focus-visible */
:focus {
  outline: none;
}

/* ========================================================================== *
   Base Styles
   ========================================================================== */

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background: radial-gradient(circle at top, #101426 0, #05060a 55%, #020308 100%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  min-height: 60vh;
}

p {
  margin-bottom: var(--space-8);
  color: var(--color-text-muted);
  }

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: var(--line-height-tight);
  letter-spacing: 0.02em;
  color: var(--color-text);
}

h1 {
  font-size: clamp(2.3rem, 2vw + 2rem, 3rem);
  margin-bottom: var(--space-12);
}

h2 {
  font-size: clamp(1.8rem, 1.5vw + 1.4rem, 2.3rem);
  margin-bottom: var(--space-10);
}

h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-8);
}

h4 {
  font-size: 1.25rem;
  margin-bottom: var(--space-6);
}

h5 {
  font-size: 1.125rem;
  margin-bottom: var(--space-4);
}

h6 {
  font-size: 1rem;
  margin-bottom: var(--space-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

strong,
b {
  font-weight: 600;
}

small {
  font-size: var(--font-size-sm);
}

code,
pre {
  font-family: var(--font-mono);
}

a {
  position: relative;
  cursor: pointer;
  transition: color var(--transition-normal),
    text-shadow var(--transition-normal),
    background-color var(--transition-normal);
}

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

a.is-underline,
.link-underline {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border-subtle);
  margin: var(--space-16) 0;
}

/* ========================================================================== *
   Accessibility & Motion
   ========================================================================== */

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* Screen reader only */
.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;
}

/* ========================================================================== *
   Utilities
   ========================================================================== */

/* Layout container */

.container {
  width: 100%;
  max-width: calc(var(--container-width) + var(--container-gutter) * 2);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-gutter);
  padding-right: var(--container-gutter);
}

.section {
  padding-top: var(--space-24);
  padding-bottom: var(--space-24);
}

.section--tight {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

/* Flex helpers */

.flex {
  display: flex;
}

.inline-flex {
  display: inline-flex;
}

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

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

.flex-column {
  display: flex;
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.gap-xs {
  gap: var(--space-4);
}

.gap-sm {
  gap: var(--space-6);
}

.gap-md {
  gap: var(--space-8);
}

.gap-lg {
  gap: var(--space-12);
}

/* Grid helpers */

.grid {
  display: grid;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-12);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-12);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-12);
}

@media (max-width: 960px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Spacing utilities (margin / padding) */

.mt-0 { margin-top: 0 !important; }
.mt-xs { margin-top: var(--space-4) !important; }
.mt-sm { margin-top: var(--space-6) !important; }
.mt-md { margin-top: var(--space-8) !important; }
.mt-lg { margin-top: var(--space-12) !important; }
.mt-xl { margin-top: var(--space-16) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-xs { margin-bottom: var(--space-4) !important; }
.mb-sm { margin-bottom: var(--space-6) !important; }
.mb-md { margin-bottom: var(--space-8) !important; }
.mb-lg { margin-bottom: var(--space-12) !important; }
.mb-xl { margin-bottom: var(--space-16) !important; }

.pt-0 { padding-top: 0 !important; }
.pt-xs { padding-top: var(--space-4) !important; }
.pt-sm { padding-top: var(--space-6) !important; }
.pt-md { padding-top: var(--space-8) !important; }
.pt-lg { padding-top: var(--space-12) !important; }
.pt-xl { padding-top: var(--space-16) !important; }

.pb-0 { padding-bottom: 0 !important; }
.pb-xs { padding-bottom: var(--space-4) !important; }
.pb-sm { padding-bottom: var(--space-6) !important; }
.pb-md { padding-bottom: var(--space-8) !important; }
.pb-lg { padding-bottom: var(--space-12) !important; }
.pb-xl { padding-bottom: var(--space-16) !important; }

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

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

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-xs);
  line-height: 1.4;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.badge--primary {
  background: var(--color-primary-soft);
  color: var(--color-primary-strong);
}

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

.badge--danger {
  background: var(--color-danger-soft);
  color: var(--color-danger);
}

/* ========================================================================== *
   Components
   ========================================================================== */

/* Buttons */

.btn {
  --btn-bg: var(--color-primary);
  --btn-bg-hover: #5e9bff;
  --btn-color: #0b0f1b;
  --btn-border: transparent;

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--btn-border);
  background: var(--btn-bg);
  color: var(--btn-color);
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color var(--transition-normal),
    box-shadow var(--transition-normal),
    transform var(--transition-fast),
    color var(--transition-normal),
    border-color var(--transition-normal);
  box-shadow: 0 0 0 0 rgba(75, 140, 255, 0.0);
}

.btn:hover {
  background: var(--btn-bg-hover);
  box-shadow: var(--shadow-glow-primary);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
  box-shadow: 0 0 0 1px rgba(75, 140, 255, 0.35);
}

.btn:disabled,
.btn[aria-disabled='true'] {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.btn--secondary {
  --btn-bg: transparent;
  --btn-bg-hover: rgba(35, 47, 82, 0.8);
  --btn-border: var(--color-border-subtle);
  --btn-color: var(--color-text);
}

.btn--ghost {
  --btn-bg: transparent;
  --btn-bg-hover: rgba(75, 140, 255, 0.16);
  --btn-border: transparent;
  --btn-color: var(--color-primary-strong);
}

.btn--danger {
  --btn-bg: var(--color-danger);
  --btn-bg-hover: #ff5d90;
  --btn-color: #1b0410;
}

.btn--sm {
  padding: 7px 14px;
  font-size: var(--font-size-xs);
}

.btn--lg {
  padding: 12px 22px;
  font-size: var(--font-size-md);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-subtle);
  background: rgba(9, 13, 26, 0.9);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background-color var(--transition-normal),
    border-color var(--transition-normal),
    color var(--transition-normal),
    transform var(--transition-fast);
}

.btn-icon:hover {
  background: var(--color-primary-soft);
  border-color: rgba(75, 140, 255, 0.7);
  color: var(--color-primary-strong);
  transform: translateY(-1px);
}

/* Inputs, selects, textareas */

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: var(--space-8);
}

.field__label {
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.field__description {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.input,
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background-color: rgba(6, 10, 20, 0.96);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: 1.4;
  transition: border-color var(--transition-normal),
    box-shadow var(--transition-normal),
    background-color var(--transition-normal);
}

.input::placeholder,
textarea::placeholder {
  color: rgba(155, 162, 198, 0.6);
}

.input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(75, 140, 255, 0.6);
}

input[disabled],
select[disabled],
textarea[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

input[type='checkbox'],
input[type='radio'] {
  width: auto;
}

/* Card component */

.card {
  position: relative;
  padding: var(--space-12);
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at top left, rgba(75, 140, 255, 0.08) 0, rgba(11, 14, 22, 0.95) 40%, #05060a 100%);
  border: 1px solid rgba(23, 32, 59, 0.9);
  box-shadow: var(--shadow-soft);
  transition: box-shadow var(--transition-normal),
    transform var(--transition-fast),
    border-color var(--transition-normal),
    background var(--transition-slow);
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(75, 140, 255, 0.6);
  box-shadow: var(--shadow-strong);
}

.card__header {
  margin-bottom: var(--space-8);
}

.card__title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-4);
}

.card__subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.card__body {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.card__footer {
  margin-top: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

/* Focus-visible for component-like elements */

.btn:focus-visible,
.btn-icon:focus-visible,
.card:focus-visible,
[role='button']:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* Tag-like pill (for filters, categories) */

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-subtle);
  background: rgba(8, 11, 22, 0.9);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: border-color var(--transition-normal),
    background-color var(--transition-normal),
    color var(--transition-normal),
    box-shadow var(--transition-normal);
}

.pill--active,
.pill:hover {
  border-color: rgba(75, 140, 255, 0.75);
  background: var(--color-primary-soft);
  color: var(--color-primary-strong);
  box-shadow: 0 0 0 1px rgba(75, 140, 255, 0.4);
}

/* Toast / status chip for global feedback (success, danger, etc.) */

.toast {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  background: rgba(8, 11, 20, 0.95);
  border: 1px solid var(--color-border-subtle);
  color: var(--color-text);
}

.toast--success {
  border-color: rgba(45, 217, 126, 0.7);
  box-shadow: 0 0 12px rgba(45, 217, 126, 0.3);
}

.toast--danger {
  border-color: rgba(255, 75, 129, 0.7);
  box-shadow: 0 0 12px rgba(255, 75, 129, 0.3);
}

.toast--warning {
  border-color: rgba(255, 204, 71, 0.7);
  box-shadow: 0 0 12px rgba(255, 204, 71, 0.3);
}

/* End of base.css */