/* ===== COMPONENTS - BUTTONS, NAVIGATION, UTILITIES ===== */

/* ===== UTILITIES ===== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    font-weight: 500;
    font-size: 1rem;
    text-decoration: none;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 2px solid transparent;
    text-align: center;
    justify-content: center;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--text-muted);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--text-light);
    transform: translateY(-2px);
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(var(--bg-primary-rgb), 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--text-muted);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-logo img {
    width: 2rem;
    height: 2rem;
}

.nav-menu {
    display: flex;
    gap: var(--space-xl);
    align-items: center;
}

.nav-link {
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
    position: relative;
    padding: var(--space-sm) 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-normal);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

/* Language Switcher */
.nav-language {
    display: flex;
    gap: var(--space-xs);
    margin-left: var(--space-md);
}

.lang-btn {
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--text-muted);
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-btn:hover,
.lang-btn.active {
    background: var(--primary-color);
    color: var(--text-light);
    border-color: var(--primary-color);
}

/* Theme Toggle */
.theme-toggle {
    margin-left: var(--space-md);
    padding: 0.5rem;
    border: none;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-normal);
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: var(--primary-color);
    color: var(--text-light);
    transform: rotate(180deg);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 0.5rem;
    background: none;
    border: none;
    position: relative;
    z-index: 1001;
}

.nav-toggle .bar {
    width: 1.5rem;
    height: 2px;
    background: var(--text-primary);
    margin: 2px 0;
    transition: all var(--transition-normal);
    border-radius: 1px;
}

.nav-toggle.active .bar:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.nav-toggle.active .bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active .bar:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* Mobile Navigation Styles */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 4rem;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--space-lg);
        box-shadow: var(--shadow-lg);
        border-top: 1px solid var(--text-muted);
        transform: translateX(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        max-height: calc(100vh - 4rem);
        overflow-y: auto;
    }

    .nav-menu.active {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        padding: var(--space-md) 0;
        border-bottom: 1px solid var(--text-muted);
        width: 100%;
        text-align: left;
    }

    .nav-link:last-child {
        border-bottom: none;
    }

    .nav-language {
        margin: var(--space-md) 0;
        border-top: 1px solid var(--text-muted);
        padding-top: var(--space-md);
    }

    .theme-toggle {
        margin: var(--space-md) 0 0 0;
    }
}

/* ===== BACK TO TOP BUTTON ===== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    background: var(--primary-color);
    color: var(--text-light);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    z-index: 1000;
}

.back-to-top:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

.back-to-top.show {
    display: flex;
}