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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--color-gray-700);
    background-color: var(--color-gray-100);
    min-height: 100vh;
}

.dark-mode body {
    background-color: var(--color-gray-100);
    color: var(--color-gray-700);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    line-height: 1.3;
    color: var(--color-gray-800);
}

.dark-mode h1,
.dark-mode h2,
.dark-mode h3,
.dark-mode h4,
.dark-mode h5,
.dark-mode h6 {
    color: var(--color-gray-800);
}

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

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

/* Page Layout */
.page-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    text-align: center;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    font-family: var(--font-body);
    font-size: 1rem;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-primary-light);
    color: white;
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: white;
}

.btn-text {
    background: none;
    border: none;
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    padding: var(--space-sm) 0;
    transition: color var(--transition-fast);
    text-decoration: underline;
}

.btn-text:hover {
    color: var(--color-secondary);
}

/* Text Link */
.text-link {
    display: inline-block;
    color: var(--color-primary);
    font-weight: 600;
    margin-top: var(--space-md);
    transition: all var(--transition-fast);
}

.text-link:hover {
    color: var(--color-secondary);
    transform: translateX(5px);
}

/* Page Transitions */
.page-transition {
    opacity: 1;
    transition: opacity 200ms ease;
}

.page-transition.fade-out {
    opacity: 0;
}

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