/* Reset and base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
    font-size: 16px;
}
body {
    font-family: var(--font-family-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-family-heading);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--space-md);
    color: var(--color-text);
}
h1 {
    font-size: clamp(2rem, 2.5vw + 1rem, 3rem);
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}
h2 {
    font-size: clamp(1.5rem, 1.8vw + 0.8rem, 2.25rem);
    margin-bottom: var(--space-lg);
    letter-spacing: -0.01em;
}
h3 {
    font-size: clamp(1.15rem, 1.1vw + 0.6rem, 1.5rem);
    margin-bottom: var(--space-md);
    letter-spacing: -0.01em;
}
p {
    margin-bottom: var(--space-md);
    font-size: 1rem;
}

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

/* Layout */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}
.document {
    background-color: var(--color-background);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    /* overflow: hidden REMOVED to allow shadows */
    box-shadow: var(--shadow-md);
}

/* Skip link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--color-primary);
    color: white;
    padding: var(--space-sm) var(--space-md);
    text-decoration: none;
    border-radius: var(--radius-md);
    z-index: var(--z-popover);
    transition: top var(--transition-normal);
}
.skip-link:focus {
    top: 6px;
}

/* Header */
.site-header {
    background-color: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    backdrop-filter: blur(12px) saturate(180%);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}
@media (prefers-color-scheme: dark) {
    .site-header {
        background-color: rgba(30, 30, 30, 0.92);
        border-bottom-color: var(--color-border);
    }
}

.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    max-width: var(--container-max-width);
    margin: 0 auto;
}
.nav-brand .brand-name {
    font-weight: var(--font-weight-bold);
    font-size: 1.15rem;
    color: var(--color-primary);
    text-decoration: none;
}
.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
    margin: 0;
    padding: 0;
}
.nav-links a {
    text-decoration: none;
    color: var(--color-text);
    font-weight: var(--font-weight-medium);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}
.nav-links a:hover,
.nav-links a:focus,
.nav-links a[aria-current="page"] {
    color: var(--color-primary);
    background-color: var(--color-surface);
}
.language-switch {
    font-weight: var(--font-weight-bold);
    color: var(--color-primary) !important;
    border: 1px solid var(--color-primary);
    padding: var(--space-xs) var(--space-sm) !important;
}

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
}
.hamburger {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--color-text);
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
}

/* Hero */
.hero-section {
    padding: clamp(var(--space-2xl), 8vh, var(--space-3xl)) var(--space-xl);
    text-align: center;
    background: linear-gradient(
        135deg,
        var(--color-surface) 0%,
        rgba(249, 247, 247, 0.5) 50%,
        var(--color-background) 100%
    );
    position: relative;
    overflow: hidden;
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
@media (prefers-color-scheme: dark) {
    .hero-section {
        background: linear-gradient(
            135deg,
            var(--color-surface) 0%,
            rgba(44, 44, 44, 0.3) 50%,
            var(--color-background) 100%
        );
    }
}
.hero-background {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.hero-banner {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.1;
}
.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}
.hero-subtitle {
    font-size: clamp(1rem, 1vw + 0.8rem, 1.2rem);
    margin: var(--space-lg) auto var(--space-2xl);
    max-width: 48rem;
    color: var(--color-text-light);
    line-height: var(--line-height-relaxed);
}

/* Hero badges */
.hero-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-2xl);
    list-style: none;
}
.badge-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background-color: var(--color-surface-alt);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}
@media (prefers-color-scheme: dark) {
    .badge-item {
        background-color: var(--color-surface);
        border-color: var(--color-border);
    }
}
.badge-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}
.badge-text {
    color: var(--color-text-light);
}

/* Sections */
.section {
    padding: clamp(var(--space-2xl), 6vh, var(--space-3xl)) var(--space-xl);
}
.section h2 {
    text-align: center;
    position: relative;
    padding-bottom: var(--space-md);
}
.section h2::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(
        90deg,
        var(--color-primary),
        var(--color-primary-light)
    );
    border-radius: var(--radius-full);
}
.section-alt {
    background: linear-gradient(
        180deg,
        var(--color-surface) 0%,
        rgba(249, 247, 247, 0.5) 100%
    );
}
@media (prefers-color-scheme: dark) {
    .section-alt {
        background: linear-gradient(
            180deg,
            var(--color-surface) 0%,
            rgba(44, 44, 44, 0.3) 100%
        );
    }
}
.section-lead {
    text-align: center;
    max-width: 650px;
    margin: 0 auto var(--space-2xl);
    font-size: clamp(1rem, 0.8vw + 0.8rem, 1.15rem);
    color: var(--color-text-light);
    line-height: var(--line-height-relaxed);
}

/* Footer */
.site-footer {
    background-color: var(--color-background);
    border-top: 1px solid var(--color-border);
    padding: var(--space-2xl) 0;
}
.footer-content {
    text-align: center;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}
.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
    list-style: none;
}
.footer-links a {
    color: var(--color-text);
    text-decoration: none;
    transition: color var(--transition-fast);
}
.footer-links a:hover {
    color: var(--color-primary);
}
.social-links {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}
.icon16 {
    width: 16px;
    height: 16px;
    object-fit: cover;
    transition: transform var(--transition-fast);
}
.social-links a:hover .icon16 {
    transform: scale(1.1);
}
.copyright {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

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

/* Responsive */
@media (max-width: 768px) {
    .main-nav {
        flex-direction: column;
        gap: var(--space-md);
        padding: var(--space-md);
    }
    .nav-toggle {
        display: flex;
        position: absolute;
        top: var(--space-md);
        right: var(--space-md);
    }
    .nav-links {
        flex-direction: column;
        gap: var(--space-sm);
        width: 100%;
        display: none;
    }
    .nav-links.is-active {
        display: flex;
    }
    .hero-section {
        padding: var(--space-2xl) var(--space-md);
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .hero-badges {
        flex-direction: column;
        align-items: center;
    }
    .section {
        padding: var(--space-2xl) var(--space-md);
    }
    .footer-links {
        flex-direction: column;
        gap: var(--space-md);
    }
    .nav-toggle[aria-expanded="true"] .hamburger:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    .nav-toggle[aria-expanded="true"] .hamburger:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle[aria-expanded="true"] .hamburger:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
}
@media (max-width: 480px) {
    .hero-section {
        padding: var(--space-xl) var(--space-md);
    }
    h1 {
        font-size: 1.6rem;
    }
    h2 {
        font-size: 1.3rem;
    }
    .section {
        padding: var(--space-xl) var(--space-md);
    }
}