/* ============================================================
   layout.css — Sidebar, top nav, mobile bottom nav, page wrapper
   ============================================================ */

/* ─── App Shell ──────────────────────────────────────────────── */
.app-shell {
    display: flex;
    min-height: 100vh;
    overflow: hidden;
}

/* ─── Desktop Sidebar ────────────────────────────────────────── */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--color-surface-container-lowest);
    border-right: 1px solid rgba(195, 197, 217, 0.3);
    box-shadow: var(--shadow-sm);
    padding: var(--space-lg) 0;
    z-index: 50;
    overflow-y: auto;
    transform: translateX(0);
    transition: transform 0.3s ease;
}

.sidebar__brand {
    padding: 0 var(--space-lg) var(--space-xl);
}

.sidebar__brand-name {
    font-family: 'Hanken Grotesk', sans-serif;
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}

.sidebar__brand-tagline {
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--color-on-surface-variant);
    margin-top: 2px;
}

.sidebar__nav {
    flex: 1;
    padding: 0 var(--space-md);
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm) + 4px;
    gap: 12px;
    padding: 12px var(--space-md);
    border-radius: var(--radius-md);
    margin: 2px var(--space-sm);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--color-on-surface);
    transition: background-color 0.2s ease, color 0.2s ease;
    text-decoration: none;
    cursor: pointer;
}

.nav-item:hover {
    background-color: var(--color-surface-container-low);
    color: var(--color-primary);
    text-decoration: none;
}

.nav-item--active {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    box-shadow: var(--shadow-primary);
    transform: scale(0.97);
}

.nav-item--active:hover {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
}

/* Additional Features sub-menu */
.nav-submenu-toggle {
    width: 100%;
    justify-content: space-between;
}

.nav-submenu {
    padding-left: 44px;
    display: none;
}

.nav-submenu.is-open {
    display: block;
}

.nav-submenu-item {
    display: block;
    padding: 8px var(--space-md);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--color-on-surface-variant);
    border-radius: var(--radius-md);
    transition: color 0.2s ease;
}

.nav-submenu-item:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.nav-submenu-item--active {
    color: var(--color-primary);
}

/* Generate Content CTA */
.sidebar__cta {
    padding: var(--space-md) var(--space-lg);
}

.sidebar__cta-btn {
    display: block;
    width: 100%;
    padding: 12px;
    background-color: var(--color-primary-container);
    color: var(--color-on-primary);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-align: center;
    box-shadow: var(--shadow-primary);
    transition: opacity 0.2s ease, transform 0.1s ease;
    text-decoration: none;
}

.sidebar__cta-btn:hover {
    opacity: 0.9;
    text-decoration: none;
    color: var(--color-on-primary);
}

.sidebar__cta-btn:active {
    transform: scale(0.98);
}

/* Bottom links (Settings, Help) */
.sidebar__footer {
    padding: var(--space-md);
    border-top: 1px solid rgba(195, 197, 217, 0.3);
    margin-top: auto;
}

/* ─── Top Navigation Bar ─────────────────────────────────────── */
.topnav {
    position: sticky;
    top: 0;
    z-index: 40;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--space-lg);
    height: var(--topnav-height);
    background-color: rgba(255,255,255,0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(195, 197, 217, 0.3);
    box-shadow: var(--shadow-sm);
}

.topnav__search {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.topnav__search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-on-surface-variant);
    font-size: 20px;
    pointer-events: none;
}

.topnav__search-input {
    width: 100%;
    padding: 8px 16px 8px 40px;
    background-color: var(--color-surface-container-low);
    border: 1px solid rgba(195, 197, 217, 0.3);
    border-radius: var(--radius-full);
    font-size: 14px;
    color: var(--color-on-surface);
    outline: none;
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.topnav__search-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(0,62,199,0.1);
}

.topnav__search-input::placeholder {
    color: var(--color-on-surface-variant);
}

.topnav__actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.topnav__icon-btn {
    position: relative;
    padding: 8px;
    color: var(--color-on-surface-variant);
    border-radius: var(--radius-md);
    transition: color 0.2s ease, background-color 0.2s ease;
}

.topnav__icon-btn:hover {
    color: var(--color-primary);
    background-color: var(--color-surface-container-low);
}

.topnav__notif-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 8px;
    height: 8px;
    background-color: var(--color-error);
    border-radius: var(--radius-full);
}

.topnav__avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    overflow: hidden;
    border: 1px solid rgba(195, 197, 217, 0.3);
    cursor: pointer;
    background-color: var(--color-surface-container);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
}

.topnav__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Mobile hamburger — shown only on mobile */
.topnav__hamburger {
    display: none;
    padding: 8px;
    color: var(--color-on-surface-variant);
}

/* ─── Main Content Area ──────────────────────────────────────── */
.main-content {
    flex: 1;
    height: 100vh;
    overflow-y: auto;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
}

.page-content {
    flex: 1;
    padding: var(--space-lg) var(--space-xl);
    max-width: 1440px;
    margin: 0 auto;
    width: 100%;
}

/* ─── Mobile Bottom Navigation ───────────────────────────────── */
.mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: var(--bottom-nav-height);
    background-color: var(--color-surface-container-lowest);
    border-top: 1px solid rgba(195, 197, 217, 0.3);
    box-shadow: 0 -4px 6px -1px rgba(0,0,0,0.05);
    z-index: 50;
    justify-content: space-around;
    align-items: center;
}

.mobile-nav__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    color: var(--color-on-surface-variant);
    font-size: 10px;
    font-weight: 600;
    transition: color 0.2s ease;
    padding: 8px;
    border: none;
    background: none;
    cursor: pointer;
}

.mobile-nav__item--active {
    color: var(--color-primary);
}

.mobile-nav__fab {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    margin-top: -32px;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
    color: var(--color-on-primary);
    box-shadow: 0 4px 12px rgba(0,62,199,0.3);
    transition: transform 0.2s ease;
    cursor: pointer;
    border: none;
}

.mobile-nav__fab:active {
    transform: scale(0.95);
}

/* Mobile sidebar overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0,0,0,0.4);
    z-index: 49;
}

/* ─── User Avatar Dropdown ───────────────────────────────────── */
.topnav__user-menu {
    position: relative;
}

.user-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: 220px;
    background: var(--color-surface);
    border: 1px solid var(--color-outline-variant);
    border-radius: 14px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    z-index: 200;
    overflow: hidden;
}

.user-dropdown__header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
}

.user-dropdown__avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    flex-shrink: 0;
}

.user-dropdown__name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-on-surface);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-dropdown__email {
    font-size: 0.75rem;
    color: var(--color-on-surface-variant);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-dropdown__divider {
    height: 1px;
    background: var(--color-outline-variant);
    margin: 0;
}

.user-dropdown__item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 12px 16px;
    border: none;
    background: transparent;
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--color-on-surface);
    cursor: pointer;
    transition: background 0.15s;
    text-align: left;
}

.user-dropdown__item:hover {
    background: var(--color-surface-container-lowest);
}

.user-dropdown__item .material-symbols-outlined {
    font-size: 18px;
    color: var(--color-on-surface-variant);
}

/* ─── Notification Dropdown ──────────────────────────────────── */
.topnav__notif-wrap {
    position: relative;
}

.notif-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: -80px;
    width: 320px;
    background: var(--color-surface);
    border: 1px solid var(--color-outline-variant);
    border-radius: 14px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    z-index: 200;
    overflow: hidden;
}

.notif-dropdown__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px 12px;
    border-bottom: 1px solid var(--color-outline-variant);
}

.notif-dropdown__title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-on-surface);
}

.notif-dropdown__subtitle {
    font-size: 0.75rem;
    color: var(--color-on-surface-variant);
}

.notif-dropdown__list {
    max-height: 360px;
    overflow-y: auto;
}

.notif-dropdown__loading,
.notif-dropdown__empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 28px 16px;
    text-align: center;
    color: var(--color-on-surface-variant);
    font-size: 0.875rem;
}

.notif-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 16px;
    border-bottom: 1px solid rgba(195,197,217,0.2);
    transition: background 0.15s;
}

.notif-item:last-child {
    border-bottom: none;
}

.notif-item--unread {
    background: color-mix(in srgb, var(--color-primary) 4%, var(--color-surface));
}

.notif-item--link {
    cursor: pointer;
}

.notif-item:hover {
    background: var(--color-surface-container-low);
}

.notif-item__icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-primary-container);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.notif-item__icon .material-symbols-outlined {
    font-size: 18px;
}

.notif-item__body {
    flex: 1;
    min-width: 0;
}

.notif-item__title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-on-surface);
    margin-bottom: 2px;
}

.notif-item__msg {
    font-size: 0.75rem;
    color: var(--color-on-surface-variant);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.notif-item__time {
    font-size: 0.6875rem;
    color: var(--color-on-surface-variant);
    margin-top: 4px;
    opacity: 0.8;
}

.notif-item__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-primary);
    flex-shrink: 0;
    margin-top: 6px;
}

/* ─── Responsive Breakpoints ─────────────────────────────────── */
@media (max-width: 767px) {
    /* Hide desktop sidebar */
    .sidebar {
        transform: translateX(calc(-1 * var(--sidebar-width)));
    }

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

    .sidebar-overlay.is-open {
        display: block;
    }

    /* Show hamburger */
    .topnav__hamburger {
        display: block;
    }

    /* Full-width content */
    .main-content {
        margin-left: 0;
    }

    /* Show mobile bottom nav */
    .mobile-nav {
        display: flex;
    }

    /* Add bottom padding so content isn't hidden behind mobile nav */
    .page-content {
        padding-bottom: calc(var(--bottom-nav-height) + var(--space-lg));
        padding-left: var(--space-margin-mobile);
        padding-right: var(--space-margin-mobile);
    }
}