/**
 * INTERCEPT Base Styles
 * Reset, typography, and foundational element styles
 * Requires: variables.css to be imported first
 */

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

html {
    -webkit-text-size-adjust: 100%;
    -moz-tab-size: 4;
    tab-size: 4;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    background-image:
        var(--noise-image),
        radial-gradient(circle at 15% 0%, var(--grid-dot), transparent 45%),
        linear-gradient(180deg, var(--grid-dot), transparent 35%),
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 40px 40px, auto, auto, 48px 48px, 48px 48px;
    background-attachment: fixed;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-semibold);
    line-height: var(--leading-tight);
    color: var(--text-primary);
    letter-spacing: 0.01em;
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

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

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

a:hover {
    color: var(--accent-cyan-hover);
}

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

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

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

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

code {
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

pre {
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    overflow-x: auto;
}

pre code {
    background: none;
    padding: 0;
}

/* ============================================
   FORM ELEMENTS
   ============================================ */
button,
input,
select,
textarea {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
    color: inherit;
}

button {
    cursor: pointer;
    border: none;
    background: none;
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

input,
select,
textarea {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-2) var(--space-3);
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 2px var(--accent-cyan-dim);
}

input::placeholder,
textarea::placeholder {
    color: var(--text-dim);
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239fb0c7' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    padding-right: 28px;
}

input[type="checkbox"],
input[type="radio"] {
    width: 16px;
    height: 16px;
    padding: 0;
    cursor: pointer;
    accent-color: var(--accent-cyan);
}

label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
    margin-bottom: var(--space-1);
}

/* ============================================
   TABLES
   ============================================ */
table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
}

th,
td {
    padding: var(--space-2) var(--space-3);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    font-weight: var(--font-semibold);
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    text-transform: uppercase;
    font-size: var(--text-xs);
    letter-spacing: 0.05em;
}

tr:hover td {
    background: var(--bg-elevated);
}

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

li {
    margin-bottom: var(--space-1);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

/* Text colors */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-cyan { color: var(--accent-cyan); }
.text-green { color: var(--accent-green); }
.text-red { color: var(--accent-red); }
.text-orange { color: var(--accent-orange); }
.text-amber { color: var(--accent-amber); }

/* Font utilities */
.font-mono { font-family: var(--font-mono); }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }

/* Text sizes */
.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }

/* Display */
.hidden { display: none !important; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

/* Flexbox */
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-1 { flex: 1; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

/* Spacing */
.m-0 { margin: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }

/* Borders */
.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.border { border: 1px solid var(--border-color); }

/* Truncate text */
.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 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;
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: var(--radius-full);
}

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

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--border-light) var(--bg-secondary);
}

/* ============================================
   SELECTION
   ============================================ */
::selection {
    background: var(--accent-cyan-dim);
    color: var(--text-primary);
}

/* ============================================
   UX POLISH - TRANSITIONS & INTERACTIONS
   ============================================ */

/* Smooth page transitions */
html {
    scroll-behavior: smooth;
}

/* Better focus ring for all interactive elements */
:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 2px;
}

/* Remove focus ring for mouse users */
:focus:not(:focus-visible) {
    outline: none;
}

/* Active state feedback */
button:active:not(:disabled),
a:active,
[role="button"]:active {
    transform: scale(0.98);
}

/* Smooth transitions for all interactive elements */
button,
a,
input,
select,
textarea,
[role="button"] {
    transition:
        color var(--transition-fast),
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        transform var(--transition-fast),
        opacity var(--transition-fast);
}

/* Subtle hover lift effect for cards and panels */
.card:hover,
.panel:hover {
    box-shadow: var(--shadow-md);
}

/* Link underline on hover */
a:hover {
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--accent-cyan);
    color: var(--bg-primary);
    padding: var(--space-2) var(--space-4);
    z-index: 9999;
    transition: top var(--transition-fast);
}

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

/* Reduced motion preference */
@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;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #4b5563;
        --text-secondary: #d1d5db;
    }
}