/* ═══════════════════════════════════════════════════════════
   LAYOUT
   Page shell: container, top bar, sidebar drawer, language
   switcher. Shared by all pages.
   ═══════════════════════════════════════════════════════════ */

/* ── Container ───────────────────────────────────────────── */

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

main.container {
    padding-top: 0;
    padding-bottom: 3rem;
}

/* ── App shell ────────────────────────────────────────────── */

.app-shell {
    min-height: 100vh;
}

.app-content {
    min-height: 100vh;
}

/* ── Site header (top bar) ────────────────────────────────── */

.site-header {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.site-header__inner {
    display: flex;
    align-items: center;
    height: 56px;
    gap: var(--space-sm);
}

/* ── Logo ─────────────────────────────────────────────────── */

.site-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    flex-shrink: 0;
    margin-right: auto; /* push site-actions to the right */
}

.site-logo:hover {
    color: var(--color-primary-dark);
    text-decoration: none;
}

.site-logo__mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 800;
}

/* ── Site actions (top-right: login + hamburger) ──────────── */

.site-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-shrink: 0;
}

.site-actions__login {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    padding: 0.3rem 0.75rem;
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast), color var(--transition-fast);
    white-space: nowrap;
}

.site-actions__login:hover {
    background: var(--color-primary);
    color: #fff;
    text-decoration: none;
}

.site-actions__register {
    font-size: 0.8125rem;
    font-weight: 600;
    color: #fff;
    text-decoration: none;
    padding: 0.3rem 0.75rem;
    background: var(--color-primary);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
    white-space: nowrap;
}

.site-actions__register:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    text-decoration: none;
}

.site-header__menu-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
    color: var(--color-text);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.site-header__menu-toggle:hover {
    background: var(--color-bg-page);
    color: var(--color-primary);
}

/* On viewports wider than the container, float the hamburger into the
   auto-margin zone so the logo aligns with the container content edge.
   Formula: left auto-margin = (100vw - 1280px) / 2
            centre of that zone = (100vw - 1280px) / 4
            offset by half button width (28px / 2 = 14px) */
@media (min-width: 1281px) {
    .site-header__menu-toggle {
        position: absolute;
        left: calc((100vw - 1280px) / 4 - 14px);
        top: 50%;
        transform: translateY(-50%);
        margin-left: 0;
    }
}

.site-header__user {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    min-width: 0;
}

.site-header__user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.75rem;
    flex-shrink: 0;
}

.site-header__user-name {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 180px;
}

/* ── Sidebar (overlay drawer) ─────────────────────────────── */

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 280px;
    display: flex;
    flex-direction: column;
    background: var(--color-bg);
    border-right: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    z-index: 300;
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform var(--transition-med);
}

.app-shell.sidebar-open .sidebar {
    transform: translateX(0);
}

/* ── Sidebar header (title + close button) ────────────────── */

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-md);
    height: 56px;
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
}

.sidebar-header__title {
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.sidebar-header__close {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.sidebar-header__close:hover {
    background: var(--color-bg-page);
    color: var(--color-text);
}

/* ── Sidebar navigation ───────────────────────────────────── */

.sidebar-nav {
    padding: var(--space-md) var(--space-sm);
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
}

.sidebar-nav__link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.5rem var(--space-md);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.sidebar-nav__link:hover {
    color: var(--color-text);
    background: var(--color-bg-page);
    text-decoration: none;
}

.sidebar-nav__link--active {
    color: var(--color-primary);
    font-weight: 600;
    background: var(--color-primary-light);
}

.sidebar-nav__sep {
    height: 1px;
    background: var(--color-border);
    margin: var(--space-sm) var(--space-md);
}

.sidebar-nav__icon {
    flex-shrink: 0;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.sidebar-nav__link:hover .sidebar-nav__icon,
.sidebar-nav__link--active .sidebar-nav__icon {
    opacity: 1;
}

/* ── Sidebar footer (user + lang switcher) ────────────────── */

.sidebar-footer {
    padding: var(--space-md);
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    flex-shrink: 0;
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) 0;
    min-width: 0;
}

.sidebar-user__avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8125rem;
    flex-shrink: 0;
}

.sidebar-user__name {
    font-size: 0.8125rem;
    color: var(--color-text);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

.sidebar-footer__sep {
    height: 1px;
    background: var(--color-border);
}

.sidebar-footer__register {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: #fff;
    text-decoration: none;
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-primary);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-sm);
    text-align: center;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.sidebar-footer__register:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    text-decoration: none;
}

.sidebar-footer__login {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-sm);
    text-align: center;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.sidebar-footer__login:hover {
    background: var(--color-primary);
    color: #fff;
    text-decoration: none;
}

.sidebar-footer__logout {
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-muted);
    padding: var(--space-xs) var(--space-sm);
    border: none;
    background: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    width: 100%;
    text-align: left;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.sidebar-footer__logout:hover {
    color: var(--color-text);
    background: var(--color-bg-page);
}

.sidebar-footer form {
    display: contents;
}

/* ── Language switcher ────────────────────────────────────── */

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 2px;
}

.lang-switcher__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 26px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.lang-switcher__btn:hover {
    background: var(--color-bg-page);
    color: var(--color-primary);
    text-decoration: none;
}

.lang-switcher__btn--active {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

/* ── Sidebar backdrop ─────────────────────────────────────── */

.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 250;
}

.app-shell.sidebar-open .sidebar-backdrop {
    display: block;
}

/* ── Narrow viewports ─────────────────────────────────────── */
@media (max-width: 768px) {
    .container { padding: 0 var(--space-md); }
    .sidebar   { width: 100%; max-width: 320px; }
}