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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Headings */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
    margin-bottom: 0.5em;
}

h1 {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-extrabold);
    letter-spacing: -0.025em;
}

h2 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.025em;
}

h3 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
}

h4 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

h5 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
}

h6 {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-medium);
}

/* Paragraphs */
p {
    margin-bottom: 1em;
    color: var(--color-text-secondary);
    line-height: var(--line-height-normal);
}

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

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

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

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

/* Strong / Bold */
strong, b {
    font-weight: var(--font-weight-semibold);
}

/* Emphasis */
em, i {
    font-style: italic;
}

/* Horizontal Rule */
hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--spacing-xl) 0;
}

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

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

/* 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;
}

/* Placeholder styles */
::placeholder {
    color: var(--color-text-muted);
    opacity: 1;
}

/* 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;
    }
}