/* =============================================================================
   LAYOUT STYLES - Navigation, sections, footer
   ============================================================================= */

/* Navigation Bar */
.navbar {
    background-color: var(--color-primary);
    color: white;
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-md);
}

.logo h1 {
    font-size: var(--font-size-lg);
    margin: 0;
    color: white;
}

/* Navigation Menu */
.nav-menu {
    display: none;
    flex-direction: column;
    gap: var(--spacing-md);
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-primary);
    padding: var(--spacing-md);
    list-style: none;
}

.nav-menu.active {
    display: flex;
}

.nav-menu a {
    color: white;
    font-weight: var(--font-weight-semibold);
    display: block;
    padding: var(--spacing-sm) 0;
    transition: color var(--transition-fast);
}

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

@media (min-width: 768px) {
    .nav-menu {
        display: flex;
        flex-direction: row;
        position: static;
        padding: 0;
        gap: var(--spacing-xl);
        margin: 0;
        background-color: transparent;
    }

    .nav-menu a {
        padding: 0;
    }
}

/* Menu Toggle Button (Mobile) */
.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    background: none;
    border: none;
    cursor: pointer;
    z-index: var(--z-fixed);
}

.menu-toggle span {
    display: block;
    width: 1.5rem;
    height: 0.2rem;
    background-color: white;
    transition: transform var(--transition-fast),
                opacity var(--transition-fast);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(0.5rem, 0.5rem);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(0.4rem, -0.4rem);
}

@media (min-width: 768px) {
    .menu-toggle {
        display: none;
    }
}

/* Sections */
.section {
    padding: var(--spacing-2xl) 0;
    border-bottom: 1px solid var(--color-border);
}

.section:last-of-type {
    border-bottom: none;
}

@media (min-width: 768px) {
    .section {
        padding: var(--spacing-3xl) 0;
    }
}

/* Hero Section */
.section.hero {
    background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: white;
    padding: var(--spacing-3xl) 0;
}

.section.hero h2 {
    color: white;
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-light);
    line-height: var(--line-height-relaxed);
}

@media (min-width: 768px) {
    .section.hero {
        padding: var(--spacing-3xl) 0;
    }

    .section.hero h2 {
        font-size: var(--font-size-3xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-xl);
    }
}

/* Content Placeholder */
.content-placeholder {
    background-color: var(--color-bg-dark);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    color: var(--color-text-secondary);
    min-height: 8rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* Footer */
.footer {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-2xl) 0;
    text-align: center;
    margin-top: var(--spacing-2xl);
}

.footer p {
    margin-bottom: var(--spacing-sm);
}

.footer a {
    color: var(--color-secondary);
}

.footer a:hover {
    color: white;
}

/* Scrollbar Styling (modern browsers) */
::-webkit-scrollbar {
    width: 0.5rem;
}

::-webkit-scrollbar-track {
    background: var(--color-border);
}

::-webkit-scrollbar-thumb {
    background: var(--color-secondary);
    border-radius: var(--radius-md);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent);
}