/* === LAYOUT: Screens, Sidebar, Content, Modal, Toast === */

/* Screens */
.screen {
    display: none;
}

.screen.active {
    display: flex;
    min-height: 100vh;
}

/* Login */
#login-screen {
    justify-content: center;
    align-items: center;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(37, 99, 235, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(37, 99, 235, 0.04) 0%, transparent 40%),
        radial-gradient(ellipse at 60% 80%, rgba(16, 185, 129, 0.03) 0%, transparent 40%),
        var(--bg-second);
}

[data-theme="dark"] #login-screen {
    background:
        radial-gradient(ellipse at 20% 50%, rgba(37, 99, 235, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(96, 165, 250, 0.04) 0%, transparent 40%),
        var(--bg-second);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 1rem;
}

.login-card {
    background: var(--bg-primary);
    border: 1px solid var(--bd-default);
    border-radius: var(--radius-xl);
    padding: 3rem 2.5rem 2.5rem;
    box-shadow: var(--shadow-elevated);
    position: relative;
}

.login-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.08);
    pointer-events: none;
}

[data-theme="dark"] .login-card::after {
    border-color: rgba(255, 255, 255, 0.06);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo {
    margin-bottom: 1rem;
}

.login-logo .icn {
    width: 48px;
    height: 48px;
    color: var(--txt-accent);
}

.login-header h1 {
    font-size: 1.25rem;
    font-weight: 700;
}

.login-subtitle {
    font-family: var(--font-body);
    color: var(--txt-second);
    margin-top: 0.25rem;
    font-size: 0.9375rem;
}

.error-message {
    color: var(--txt-error);
    font-size: 0.875rem;
    margin-top: 1rem;
    text-align: center;
}

/* Sidebar */
#sidebar {
    width: var(--sidebar-width);
    background: var(--bg-primary);
    border-right: 1px solid var(--bd-divider);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: transform var(--trans-base);
}

[data-theme="dark"] #sidebar {
    background: #131315;
    border-right-color: rgba(255, 255, 255, 0.05);
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem 1.5rem 1.25rem;
    border-bottom: 1px solid var(--bd-divider);
}

.sidebar-logo {
    display: flex;
    align-items: center;
}

.sidebar-logo .icn {
    width: 28px;
    height: 28px;
    color: var(--txt-accent);
}

.sidebar-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    color: var(--txt-primary);
    letter-spacing: -0.02em;
}

.sidebar-nav {
    list-style: none;
    padding: 1rem 0.75rem;
    flex: 1;
    overflow-y: auto;
}

.sidebar-nav li {
    margin-bottom: 2px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 1rem;
    border-radius: var(--radius-sm);
    color: var(--txt-second);
    transition: all var(--trans-base);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    position: relative;
}

.nav-link:hover {
    background: var(--bg-hover);
    color: var(--txt-primary);
    opacity: 1;
}

.nav-link.active {
    background: rgba(var(--c-accent), 0.06);
    color: var(--txt-accent);
    font-weight: 600;
    border-left: 3px solid rgba(var(--c-accent), 1);
    padding-left: calc(1rem - 3px);
}

.nav-link.active .icn {
    color: rgba(var(--c-accent), 1);
}

.nav-link .icn {
    width: 20px;
    height: 20px;
}

.nav-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
}

.sidebar-footer {
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--bd-divider);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.user-name-text {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--txt-primary);
}

.user-role-badge {
    font-family: var(--font-body);
    font-size: 0.6875rem;
    font-weight: 500;
    padding: 2px 8px;
    border-radius: 10px;
    display: inline-block;
    width: fit-content;
}

.role-admin {
    background: rgba(var(--c-accent), 0.08);
    color: var(--txt-accent);
}

.role-editor {
    background: var(--green-bg);
    color: var(--green);
}

.role-viewer {
    background: var(--blue-bg);
    color: var(--blue);
}

/* Mobile menu button */
.mobile-menu-btn {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 101;
    background: var(--bg-primary);
    border: 1px solid var(--bd-default);
    border-radius: var(--radius-sm);
    padding: 0.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-light);
}

.mobile-menu-btn .icn {
    width: 24px;
    height: 24px;
    color: var(--txt-primary);
}

/* Sidebar overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 99;
}

/* Main content */
#content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 2rem 2.5rem 3rem;
    width: calc(100% - var(--sidebar-width));
    max-width: calc(var(--max-width) + var(--sidebar-width));
}

.page {
    display: none;
}

.page.active {
    display: block;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }

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

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.page-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.page-title .icn {
    color: var(--txt-second);
}

.page-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.modal-overlay.show {
    opacity: 1;
}

.modal {
    background: var(--bg-primary);
    border: 1px solid var(--bd-default);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 960px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-elevated);
    transform: scale(0.95) translateY(12px);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-wide .modal {
    max-width: min(1100px, 95vw);
}

.modal-overlay.show .modal {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--bd-divider);
}

.modal-close {
    background: none;
    border: none;
    color: var(--txt-tertiary);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: all var(--trans-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.modal-body {
    padding: 1.5rem;
}

/* Toast */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: var(--bg-primary);
    border: 1px solid var(--bd-default);
    border-radius: var(--radius-card);
    padding: 0.875rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-elevated);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 500;
    transform: translateX(120%);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast.show {
    transform: translateX(0);
}

.toast-success {
    border-left: 3px solid var(--green);
}

.toast-error {
    border-left: 3px solid var(--red);
}

.toast-info {
    border-left: 3px solid var(--blue);
}

.toast .icn {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* Responsive */
@media (max-width: 1024px) {
    #content {
        padding: 1.5rem 1.5rem;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    #sidebar {
        transform: translateX(-100%);
    }

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

    .sidebar-overlay.active {
        display: block;
    }

    #content {
        margin-left: 0;
        width: 100%;
        padding: 4rem 1rem 1rem;
    }
}

@media (max-width: 620px) {
    #content {
        padding: 3.5rem 0.75rem 0.75rem;
    }

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

    .modal {
        width: 95%;
        max-height: 90vh;
    }
}