/* ============================================
   BASE STYLES & TYPOGRAPHY
   ============================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    background: var(--bg);
    color: var(--body-text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: var(--surface);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    z-index: 9999;
    text-decoration: none;
    font-weight: 500;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    line-height: 1.2;
    color: var(--primary);
}

h1 {
    font-size: clamp(2.5rem, 8vw, 4rem);
}

h2 {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    margin-bottom: var(--space-lg);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    margin-bottom: var(--space-md);
}

h4 {
    font-size: 1.125rem;
    margin-bottom: var(--space-sm);
}

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

p:last-child {
    margin-bottom: 0;
}

a {
    color: var(--primary);
    text-decoration: underline;
    text-decoration-color: var(--accent);
    text-underline-offset: 3px;
    transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

a:hover {
    color: var(--deep-accent);
    text-decoration-color: var(--deep-accent);
}

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

strong {
    font-weight: 600;
}

/* Lists */
ul, ol {
    padding-left: 1.5rem;
    margin-bottom: var(--space-md);
}

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

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

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--deep-accent);
}

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

/* Focus visible for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Utility classes */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

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

.text-accent {
    color: var(--deep-accent);
}