/* ==========================================================================
   Base - Reset, Font Face, Typography
   ========================================================================== */

/* Font Face - Inter Variable (self-hosted for GDPR) */
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 100 900;
    font-display: swap;
    src: url('../fonts/inter-variable.woff2') format('woff2');
}

@font-face {
    font-family: 'Inter';
    font-style: italic;
    font-weight: 100 900;
    font-display: swap;
    src: url('../fonts/inter-variable-italic.woff2') format('woff2');
}

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

html {
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    text-size-adjust: 100%;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + var(--space-4));
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

body.menu-open {
    overflow: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    letter-spacing: var(--letter-spacing-tight);
    color: var(--color-primary-dark);
}

h1 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-5);
}

h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-4);
}

h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-3);
}

h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-3);
}

h5, h6 {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-2);
}

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

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

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

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

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

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

ul, ol {
    padding-left: var(--space-5);
    margin-bottom: var(--space-4);
}

li {
    margin-bottom: var(--space-2);
}

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

blockquote {
    border-left: 4px solid var(--color-primary-light);
    padding: var(--space-4) var(--space-5);
    margin: var(--space-5) 0;
    background: var(--color-bg-light);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
    color: var(--color-text-light);
}

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

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--space-5);
}

th, td {
    padding: var(--space-3) var(--space-4);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

th {
    font-weight: var(--font-weight-semibold);
    background: var(--color-bg-light);
    color: var(--color-primary-dark);
}

/* Selection */
::selection {
    background-color: rgba(var(--color-primary-rgb), 0.15);
    color: var(--color-primary-dark);
}

/* 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;
}

/* Scroll Animations */
[data-animate] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

[data-animate="fade-in"] {
    transform: none;
}

[data-animate="slide-left"] {
    transform: translateX(-24px);
}

[data-animate="slide-right"] {
    transform: translateX(24px);
}

[data-animate="scale"] {
    transform: scale(0.95);
}

[data-animate].is-visible {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    [data-animate] {
        opacity: 1;
        transform: none;
        transition: none;
    }
}