/* ===========================================
   Layout Styles
   Header, nav, footer, containers, grid
   =========================================== */

/* Layout containers */
.container {
    width: 90%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-lg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container.wide {
    --max-width: 1400px;
}

/* Content wrapper for narrow pages within wide container */
.content-wrapper {
    max-width: 640px;
    margin: 0 auto;
}

/* Header */
header {
    padding: var(--spacing-md) 0;
    margin-bottom: var(--spacing-lg);
}

.container:not(.wide) header {
    margin-bottom: var(--spacing-xl);
}

nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--color-text);
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.logo:hover {
    opacity: 0.7;
}

.nav-links {
    display: flex;
    gap: var(--spacing-sm);
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 0.375rem;
    transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-link:hover {
    color: var(--color-text);
    background-color: var(--color-border);
}

.nav-link.active {
    color: var(--color-accent);
    background-color: var(--color-accent-light);
}

/* Hamburger menu button (hidden on desktop) */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    padding: 0;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: border-color var(--transition-normal);
}

.hamburger:hover {
    border-color: var(--color-text-muted);
}

.hamburger-line {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--color-text-muted);
    border-radius: 1px;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* Hamburger animation when open */
.hamburger.open .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.open .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger.open .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Dark mode toggle button */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--color-text-muted);
    transition: color var(--transition-normal), border-color var(--transition-normal), background-color var(--transition-normal);
    margin-left: var(--spacing-xs);
}

.theme-toggle:hover {
    color: var(--color-text);
    border-color: var(--color-text-muted);
    background-color: var(--color-control-bg);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-normal);
}

.theme-toggle:hover svg {
    transform: rotate(15deg);
}

/* Hide/show sun/moon icons based on theme */
.theme-toggle .icon-sun {
    display: none;
}

.theme-toggle .icon-moon {
    display: block;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}

[data-theme="dark"] .theme-toggle .icon-moon {
    display: none;
}

/* Main content */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Grid layout */
.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    flex: 1;
}

@media (min-width: 1024px) {
    .grid {
        grid-template-columns: 1fr 1fr;
    }
}

.left-column,
.right-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.right-column {
    min-height: 500px;
}

/* Footer */
footer {
    padding: var(--spacing-lg) 0;
    margin-top: auto;
}

footer p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* Mobile navigation */
@media (max-width: 640px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: var(--color-bg);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        padding: var(--spacing-xs);
        margin-top: var(--spacing-xs);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: opacity var(--transition-normal), visibility var(--transition-normal), transform var(--transition-normal);
        z-index: 100;
        box-shadow: var(--shadow-lg);
    }

    .nav-links.open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .nav-link {
        display: block;
        padding: var(--spacing-sm) var(--spacing-md);
        border-radius: var(--radius-sm);
    }

    .theme-toggle {
        margin: var(--spacing-xs) var(--spacing-sm);
        margin-left: var(--spacing-sm);
    }

    nav {
        position: relative;
    }
}