/**
 * Base Module Styles
 * 
 * This file contains common styles shared by all language modules.
 * These styles apply to navigation, body layout, and basic page structure.
 * 
 * Module-specific CSS files should NOT duplicate these styles.
 */

/* || General Styles */

html, body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-main);
    font-family: var(--font-family-main);
    overflow-x: hidden;
    overflow-y: auto;
    font-size: 1rem;
}

#body {
    margin: auto;
    margin-top: calc(var(--nav-height) + 1rem);
    width: 95%;
}

/* || Navigation */

nav {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--bg-surface);
    height: var(--nav-height);
    box-shadow: var(--shadow-nav);
    z-index: var(--z-index-nav);
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 1px solid var(--border-subtle);
}

nav > div#nav-wrapper {
    display: grid;
    grid-template-columns: 1fr auto;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    max-width: 1400px;
    padding: 0 2.5rem;
    margin: auto;
}

nav #nav-logo {
    font-family: var(--font-family-title);
    font-size: var(--font-size-nav);
    line-height: var(--line-height-nav);
    color: var(--colour-primary);
    text-decoration: none;
    font-weight: 700;
    letter-spacing: -0.02em;
}

nav #nav-logo a {
    color: inherit;
    text-decoration: none;
}

nav #nav-opt {
    display: flex;
    gap: 2rem;
    align-items: center;
}

nav #nav-opt img {
    height: 2.5rem;
    width: 2.5rem;
    cursor: pointer;
    padding: 0;
    border-radius: 0;
    background-color: transparent;
    transition: background-color var(--transition-base), transform var(--transition-base);
}

nav #nav-opt img:hover {
    background-color: transparent;
    transform: none;
}

nav a {
    font-size: var(--font-size-nav-link);
    font-weight: 500;
    text-decoration: none;
    color: var(--colour-primary);
    white-space: nowrap;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-medium);
    transition: color var(--transition-base), background-color var(--transition-base);
}

nav a:hover {
    color: var(--colour-accent);
    background-color: var(--colour-accent-soft);
}

/* || Responsive Navigation */

nav #nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    padding: 0.25rem;
    border: none;
    border-radius: var(--radius-pill);
    background-color: var(--bg-surface-muted);
    cursor: pointer;
    transition: background-color var(--transition-base), transform var(--transition-base);
}

nav #nav-toggle:hover {
    background-color: var(--colour-accent-soft);
    transform: scale(1.05);
}

nav #nav-toggle svg {
    width: 1.5rem;
    height: 1.5rem;
}

nav.nav-collapsed #nav-opt {
    gap: 0.75rem;
}

nav.nav-collapsed #nav-toggle {
    display: inline-flex;
}

nav.nav-collapsed #nav-opt a {
    display: none;
}

nav.nav-collapsed.nav-open #nav-opt {
    position: absolute;
    top: calc(var(--nav-height) + 0.5rem);
    right: 2rem;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-medium);
    padding: 0.75rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
    box-shadow: var(--shadow-nav);
    z-index: calc(var(--z-index-nav) + 1);
}

nav.nav-collapsed.nav-open #nav-opt a {
    display: flex;
    align-items: center;
    width: 100%;
}

/* || Responsive Breakpoints */

@media (max-width: 900px) {
    nav > div#nav-wrapper {
        padding: 0 1.5rem;
    }

    nav #nav-logo {
        font-size: 1.35rem;
    }

    nav a {
        font-size: 1.05rem;
        padding: 0.4rem 0.75rem;
    }
}

@media (max-width: 600px) {
    #body {
        width: 92%;
    }

    nav > div#nav-wrapper {
        padding: 0 1rem;
    }

    nav.nav-collapsed.nav-open #nav-opt {
        right: 1rem;
        left: 1rem;
    }
}