/* ==========================================================================
   Base — CSS reset, typography, body defaults.
   Uses design tokens exclusively — no hardcoded values.
   ========================================================================== */

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

/* --------------------------------------------------------------------------
   HTML / Body
   -------------------------------------------------------------------------- */
html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-bg);
}

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

h1 {
    font-size: var(--font-size-3xl);
}
h2 {
    font-size: var(--font-size-2xl);
}
h3 {
    font-size: var(--font-size-xl);
}
h4 {
    font-size: var(--font-size-lg);
}
h5 {
    font-size: var(--font-size-base);
}
h6 {
    font-size: var(--font-size-sm);
}

p {
    margin-bottom: var(--space-4);
    color: var(--color-text-secondary);
}

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

a:hover {
    color: var(--color-primary-light);
    text-decoration: underline;
}

a:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

strong,
b {
    font-weight: var(--font-weight-semibold);
}

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

code,
pre {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

code {
    padding: 0.15em 0.4em;
    background-color: var(--color-gray-100);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
}

pre {
    padding: var(--space-4);
    background-color: var(--color-gray-100);
    border-radius: var(--radius-md);
    overflow-x: auto;
}

/* --------------------------------------------------------------------------
   Lists
   -------------------------------------------------------------------------- */
ul,
ol {
    padding-left: var(--space-6);
    margin-bottom: var(--space-4);
}

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

/* --------------------------------------------------------------------------
   Horizontal rule
   -------------------------------------------------------------------------- */
hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--space-6) 0;
}

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

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

/* Remove default focus outline — we style our own */
:focus:not(:focus-visible) {
    outline: none;
}

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

/* --------------------------------------------------------------------------
   Skip-to-content link (accessibility)
   -------------------------------------------------------------------------- */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-4);
    z-index: var(--z-tooltip);
    padding: var(--space-2) var(--space-4);
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    font-weight: var(--font-weight-semibold);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* --------------------------------------------------------------------------
   Density variants (applied on <body>)
   -------------------------------------------------------------------------- */
body.density-compact {
    --content-padding-x: 12px;
    --content-padding-y: 12px;
    font-size: 14px;
}

body.density-comfortable {
    --content-padding-x: 32px;
    --content-padding-y: 32px;
    font-size: 18px;
}

body.content-width-wide {
    --content-max-width: 1680px;
}

body.content-width-full {
    --content-max-width: none;
}

body.content-width-full .main-content {
    max-width: none;
}

body.line-height-tight {
    --line-height-normal: 1.25;
}

body.line-height-relaxed {
    --line-height-normal: 1.75;
}

/* --------------------------------------------------------------------------

/* Inter font: download Inter-Variable.woff2 to /public/fonts/ to use custom font. */

/* ==========================================================================
   Native desktop feel
   ========================================================================== */

/* Custom scrollbar (WebKit) */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--color-gray-300);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-400);
}

/* Font smoothing */
body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Focus rings — native app style, replace browser defaults */
:focus-visible {
  outline: 2px solid var(--color-primary-light);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}
:focus:not(:focus-visible) {
  outline: none;
}

/* Disable text selection on UI chrome */
.titlebar,
.sidebar,
.topbar,
.app-topbar,
.app-sidebar,
.btn,
.nav-item,
.card-header,
.page-header,
.table-container-header,
.content-card-header,
.sidebar-item,
.breadcrumb,
.pagination,
.toast {
  user-select: none;
  -webkit-user-select: none;
}

/* Allow text selection in data areas */
.data-table,
.data-table td,
.data-table th,
.form-input,
.form-select,
.form-textarea,
textarea,
input[type="text"],
input[type="search"],
input[type="email"],
input[type="number"],
input[type="password"] {
  user-select: text;
  -webkit-user-select: text;
}