/**
 * Base styles - Reset and Typography
 */

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

/* Remove default margin/padding */
* {
    margin: 0;
    padding: 0;
}

/* Prevent font size inflation */
html {
    -moz-text-size-adjust: none;
    -webkit-text-size-adjust: none;
    text-size-adjust: none;
    scroll-behavior: smooth;
}

/* Core body defaults */
body {
    min-height: 100vh;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-secondary);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Improve media defaults */
img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

/* Remove built-in form typography styles */
input,
button,
textarea,
select {
    font: inherit;
}

/* Avoid text overflows */
p,
h1,
h2,
h3,
h4,
h5,
h6 {
    overflow-wrap: break-word;
}

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

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);
}

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

a:hover,
a:focus {
    color: var(--color-text);
}

/* Lists */
ul,
ol {
    list-style: none;
}

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

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

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

/* 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;
}

.sr-only:focus {
    position: fixed;
    top: var(--space-sm);
    left: var(--space-sm);
    z-index: var(--z-tooltip);
    width: auto;
    height: auto;
    padding: var(--space-md) var(--space-lg);
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
    background-color: var(--color-surface);
    color: var(--color-text);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

/* Skip link */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-md);
    z-index: var(--z-tooltip);
    padding: var(--space-sm) var(--space-md);
    background-color: var(--color-primary);
    color: var(--color-text);
    border-radius: var(--radius-md);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--space-md);
}

/* Utilities */
.text-center {
    text-align: center;
}

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

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

.nowrap {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.visually-hidden {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    word-wrap: normal !important;
}