/* ============================================
   LAYOUT - Navigation & Page Structure
   ============================================ */

/* === LOADING SCREEN === */
.loading-screen {
    position: fixed;
    inset: 0;
    background-color: var(--color-bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-container {
    text-align: center;
}

.loading-logo {
    margin-bottom: var(--space-6);
}

.logo-text {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.logo-accent {
    color: var(--color-accent);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto var(--space-4);
}

.loading-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* === APP LAYOUT === */
.app-layout {
    display: flex;
    min-height: 100vh;
    min-height: 100dvh;
}

/* === SIDEBAR (Desktop & Tablet) === */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100%;
    background-color: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border-light);
    display: flex;
    flex-direction: column;
    z-index: var(--z-fixed);
    transition: transform var(--transition-base), width var(--transition-base);
}

.sidebar-header {
    padding: var(--space-5);
    border-bottom: 1px solid var(--color-border-light);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.sidebar-logo-icon {
    width: 40px;
    height: 40px;
    background-color: var(--color-primary);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
}

.sidebar-logo-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-4);
    overflow-y: auto;
}

.sidebar-section {
    margin-bottom: var(--space-6);
}

.sidebar-section-title {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-tertiary);
    padding: var(--space-2) var(--space-3);
    margin-bottom: var(--space-2);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--border-radius-md);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.nav-item:hover {
    background-color: var(--color-bg-hover);
    color: var(--color-text-primary);
}

.nav-item.active {
    background-color: var(--color-accent-bg);
    color: var(--color-accent);
}

.nav-item-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: var(--space-4);
    border-top: 1px solid var(--color-border-light);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--color-accent-bg);
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-semibold);
}

.user-details {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

.user-role {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    text-transform: capitalize;
}

/* === MAIN CONTENT === */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding-bottom: 0;
    min-height: 100vh;
    min-height: 100dvh;
}

/* === PAGE STRUCTURE === */
.page {
    padding: var(--space-6);
    max-width: var(--content-max-width);
    margin: 0 auto;
}

.page-header {
    margin-bottom: var(--space-6);
}

.page-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.page-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
}

.page-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-1);
}

.page-actions {
    display: flex;
    gap: var(--space-3);
}

/* === BOTTOM NAVIGATION (Mobile) === */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom));
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border-light);
    z-index: var(--z-fixed);
    padding-bottom: env(safe-area-inset-bottom);
}

.bottom-nav-items {
    display: flex;
    height: var(--bottom-nav-height);
}

.bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    color: var(--color-text-tertiary);
    font-size: var(--font-size-xs);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.bottom-nav-item:hover {
    color: var(--color-text-primary);
}

/* Responsive Grid Buttons for Mobile */
.grid-buttons-mobile {
    display: grid;
    grid-template-columns: 1fr;
    /* Stack on very small screens */
    gap: var(--space-3);
}

@media (min-width: 360px) {

    /* Small mobile breakpoint */
    .grid-buttons-mobile {
        grid-template-columns: repeat(2, 1fr);
        /* Side by side on standard mobile */
    }
}

.bottom-nav-item.active {
    color: var(--color-accent);
}

.bottom-nav-item {
    position: relative;
}

.bottom-nav-item.active::after {
    content: '';
    position: absolute;
    top: 0;
    left: 20%;
    right: 20%;
    height: 2px;
    background-color: var(--color-accent);
    border-radius: 0 0 4px 4px;
}

.bottom-nav-icon {
    width: 24px;
    height: 24px;
}

/* === MORE MENU (Mobile) === */
.more-menu {
    position: fixed;
    bottom: var(--bottom-nav-height);
    left: 0;
    right: 0;
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border-light);
    padding: var(--space-4);
    transform: translateY(100%);
    transition: transform var(--transition-base);
    z-index: var(--z-modal);
}

.more-menu.open {
    transform: translateY(0);
}

.more-menu-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: var(--z-modal-backdrop);
}

.more-menu-overlay.open {
    opacity: 1;
    visibility: visible;
}

/* === MODAL === */
.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal-overlay.open {
    opacity: 1;
    visibility: visible;
}

.modal {
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    background-color: var(--color-bg-secondary);
    border-radius: var(--border-radius-xl) var(--border-radius-xl) 0 0;
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform var(--transition-base);
}

.modal-overlay.open .modal {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5);
    border-bottom: 1px solid var(--color-border-light);
}

.modal-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--color-text-secondary);
}

.modal-close:hover {
    background-color: var(--color-bg-hover);
}

.modal-body {
    padding: var(--space-5);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: var(--space-4) var(--space-5);
    border-top: 1px solid var(--color-border-light);
    display: flex;
    gap: var(--space-3);
    justify-content: flex-end;
}

@media (min-width: 768px) {
    .modal-overlay {
        align-items: center;
        padding: var(--space-6);
    }

    .modal {
        border-radius: var(--border-radius-xl);
        max-height: 80vh;
    }
}

/* === TOAST === */
.toast-container {
    position: fixed;
    top: var(--space-4);
    right: var(--space-4);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.toast {
    padding: var(--space-4);
    background-color: var(--color-bg-secondary);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    min-width: 280px;
    max-width: 400px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast-success {
    border-left: 4px solid var(--color-success);
}

.toast-error {
    border-left: 4px solid var(--color-danger);
}

.toast-warning {
    border-left: 4px solid var(--color-warning);
}

.toast-info {
    border-left: 4px solid var(--color-info);
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

    .main-content {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .bottom-nav {
        display: block;
    }

    .main-content {
        padding-bottom: var(--bottom-nav-height);
    }

    .page {
        padding: var(--space-4);
    }

    .page-title {
        font-size: var(--font-size-xl);
    }

    .page-header-row {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* === SIDEBAR TOGGLE === */
.sidebar-toggle {
    display: none;
    position: fixed;
    top: var(--space-4);
    left: var(--space-4);
    width: 44px;
    height: 44px;
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    align-items: center;
    justify-content: center;
    z-index: var(--z-sticky);
    cursor: pointer;
}

@media (max-width: 1024px) {
    .sidebar-toggle {
        display: flex;
    }
}

/* === SIDEBAR OVERLAY === */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.3);
    z-index: calc(var(--z-fixed) - 1);
}

@media (max-width: 1024px) {
    .sidebar-overlay.open {
        display: block;
    }
}

/* === DETAIL PAGE === */
.detail-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.detail-back {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-md);
    color: var(--color-text-secondary);
    flex-shrink: 0;
}

.detail-back:hover {
    background-color: var(--color-bg-hover);
}

.detail-info {
    flex: 1;
}

.detail-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-1);
}

.detail-meta {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

@media (max-width: 480px) {
    .info-grid {
        grid-template-columns: 1fr;
    }
}

.info-item {}

.info-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-1);
}

.info-value {
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
}

/* === SECTION === */
.section {
    margin-bottom: var(--space-8);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

/* === FILTER BAR === */
.filter-bar {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
    overflow-x: auto;
    padding-bottom: var(--space-2);
}

.filter-chip {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    background-color: var(--color-bg-tertiary);
    border: none;
    border-radius: var(--border-radius-full);
    cursor: pointer;
    white-space: nowrap;
}

.filter-chip:hover {
    background-color: var(--color-bg-active);
}

.filter-chip.active {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
}