:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --danger: #ef4444;
    --dark: #1e293b;
    --gray: #64748b;
    --light: #f8fafc;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --sidebar-width: 280px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    min-height: 100vh;
    color: var(--dark);
}

/* ===== LOGIN PAGE ===== */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: bgPulse 8s ease-in-out infinite;
}

@keyframes bgPulse {
    0%, 100% { background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%); }
    50% { background: linear-gradient(135deg, #e0f2fe 0%, #dbeafe 100%); }
}

.login-container {
    width: 100%;
    max-width: 400px;
    animation: fadeInUp 0.6s ease-out;
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius);
    padding: 40px 32px;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.logo-wrapper {
    display: flex;
    justify-content: center;
    margin-bottom: 24px;
}

.logo {
    width: 80px;
    height: 80px;
    animation: pulse 2s infinite;
    filter: drop-shadow(0 4px 6px rgba(37, 99, 235, 0.2));
}

.login-card h1 {
    font-size: 28px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 32px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    position: relative;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray);
    margin-bottom: 6px;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    font-size: 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    outline: none;
    transition: var(--transition);
    background: white;
}

.form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
    transform: translateY(-1px);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 24px;
    font-size: 16px;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-block { width: 100%; }

.btn-loader {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid white;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.btn.loading .btn-text { opacity: 0; }
.btn.loading .btn-loader { display: block; position: absolute; }

.error-message {
    color: var(--danger);
    font-size: 14px;
    text-align: center;
    min-height: 20px;
    animation: shake 0.5s ease-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* ===== MAIN PAGE ===== */
.main-page { background: var(--light); }

.app-wrapper {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* ===== SIDEBAR ===== */
.sidebar {
    width: var(--sidebar-width);
    background: white;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 24px 16px;
    transition: var(--transition);
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.05);
}

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

/* Бургер-меню */
.menu-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 200;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: white;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.menu-toggle:hover {
    background: var(--primary);
    color: white;
}

.menu-toggle svg {
    width: 24px;
    height: 24px;
}

/* Оверлей для мобильного меню */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 90;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header .logo {
    width: 40px;
    height: 40px;
    animation: none;
}

.app-name {
    font-size: 20px;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-nav {
    flex: 1;
    padding: 24px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--gray);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.nav-item svg {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
}

.nav-item:hover svg {
    transform: scale(1.1);
}

.nav-item:hover,
.nav-item.active {
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    color: var(--primary);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background: var(--primary);
    border-radius: 0 3px 3px 0;
}

.sidebar-footer {
    border-top: 1px solid var(--border);
    padding-top: 20px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px;
}

.avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
    box-shadow: var(--shadow);
}

.username {
    font-weight: 500;
    color: var(--dark);
}

.btn-logout {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 12px 16px;
    margin-top: 16px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--danger);
    cursor: pointer;
    transition: var(--transition);
}

.btn-logout svg {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
}

.btn-logout:hover {
    background: #fef2f2;
    border-color: var(--danger);
}

.btn-logout:hover svg {
    transform: translateX(3px);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 32px 40px;
    transition: margin-left 0.3s ease;
    animation: fadeIn 0.5s ease-out;
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 20px;
}

.page-header h1 {
    font-size: 32px;
    font-weight: 600;
    background: linear-gradient(135deg, var(--dark), var(--gray));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.search-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    background: white;
    padding: 4px;
    border-radius: 50px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.search-wrapper:focus-within {
    box-shadow: var(--shadow-lg), 0 0 0 3px rgba(37, 99, 235, 0.1);
    border-color: var(--primary);
}

.search-icon {
    width: 20px;
    height: 20px;
    color: var(--gray);
    margin-left: 16px;
    transition: color 0.3s ease;
}

.search-wrapper:focus-within .search-icon {
    color: var(--primary);
}

.search-input {
    width: 280px;
    padding: 12px 0;
    border: none;
    outline: none;
    font-size: 15px;
    background: transparent;
}

.search-wrapper .btn {
    border-radius: 50px;
    padding: 12px 24px;
    margin: 4px;
}

/* ===== CONTENT AREA ===== */
.content-area {
    position: relative;
    min-height: 400px;
}

.nodes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 20px;
}

/* Карточка узла */
.node-card {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: var(--transition);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: cardAppear 0.5s ease-out backwards;
}

@keyframes cardAppear {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.node-card:nth-child(1) { animation-delay: 0.05s; }
.node-card:nth-child(2) { animation-delay: 0.1s; }
.node-card:nth-child(3) { animation-delay: 0.15s; }
.node-card:nth-child(4) { animation-delay: 0.2s; }
.node-card:nth-child(5) { animation-delay: 0.25s; }
.node-card:nth-child(n+6) { animation-delay: 0.3s; }

.node-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.node-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 16px 12px 16px;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(180deg, white, var(--light));
}

.node-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.node-card:hover .node-icon {
    transform: scale(1.05) rotate(5deg);
}

.node-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.node-icon.resource-1 { background: linear-gradient(135deg, #3b82f6, #1d4ed8); }
.node-icon.resource-2 { background: linear-gradient(135deg, #10b981, #059669); }
.node-icon.resource-3 { background: linear-gradient(135deg, #f59e0b, #d97706); }
.node-icon.resource-4 { background: linear-gradient(135deg, #ef4444, #dc2626); }

.node-header-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.node-code {
    font-size: 15px;
    font-weight: 600;
    color: var(--dark);
    word-break: break-word;
    line-height: 1.3;
}

.status-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 500;
    background: #dcfce7;
    color: #166534;
    align-self: flex-start;
    transition: var(--transition);
}

.status-badge.disabled {
    background: #fee2e2;
    color: #991b1b;
}

.node-card-body {
    padding: 12px 16px 16px 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.node-row {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 13px;
    color: var(--gray);
    line-height: 1.5;
}

.node-row svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--gray);
    transition: color 0.3s ease;
}

.node-card:hover .node-row svg {
    color: var(--primary);
}

.node-row-text {
    flex: 1;
    word-break: break-word;
}

.node-badge {
    display: inline-block;
    padding: 2px 6px;
    background: var(--light);
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin-right: 4px;
}

/* ===== EMPTY STATE ===== */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    color: var(--gray);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.empty-state svg {
    width: 80px;
    height: 80px;
    margin-bottom: 24px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 18px;
    margin-bottom: 8px;
}

/* ===== LOADER ===== */
.loader-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    z-index: 10;
    animation: fadeIn 0.3s ease-out;
}

.loader-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ===== MODAL ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease-out;
}

.modal-content {
    position: relative;
    background: white;
    border-radius: var(--radius);
    padding: 32px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--light);
    border: none;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--danger);
    color: white;
    transform: rotate(90deg);
}

.modal-detail-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.modal-detail-row {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    animation: slideIn 0.4s ease-out backwards;
}

.modal-detail-row:nth-child(1) { animation-delay: 0.05s; }
.modal-detail-row:nth-child(2) { animation-delay: 0.1s; }
.modal-detail-row:nth-child(3) { animation-delay: 0.15s; }
.modal-detail-row:nth-child(4) { animation-delay: 0.2s; }
.modal-detail-row:nth-child(5) { animation-delay: 0.25s; }

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.modal-detail-row:last-child {
    border-bottom: none;
}

.modal-detail-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--primary);
}

.modal-detail-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.modal-detail-label {
    font-size: 11px;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.modal-detail-value {
    font-size: 15px;
    font-weight: 500;
    color: var(--dark);
    word-break: break-word;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .main-content {
        padding: 24px 28px;
    }
    
    .nodes-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: 100;
        transform: translateX(-100%);
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.1);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .sidebar-overlay {
        display: block;
        pointer-events: none;
    }
    
    .sidebar-overlay.active {
        pointer-events: auto;
    }
    
    .main-content {
        margin-left: 0 !important;
        padding: 16px;
        padding-top: 72px;
    }
    
    .page-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .page-header h1 {
        font-size: 24px;
    }
    
    .search-wrapper {
        width: 100%;
    }
    
    .search-input {
        width: 100%;
    }
    
    .nodes-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .node-card-header {
        padding: 12px;
    }
    
    .node-card-body {
        padding: 10px 12px 12px 12px;
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: 32px 20px;
    }
    
    .login-card h1 {
        font-size: 24px;
    }
    
    .search-wrapper {
        flex-wrap: wrap;
        border-radius: var(--radius);
        padding: 12px;
        gap: 12px;
    }
    
    .search-icon {
        display: none;
    }
    
    .search-input {
        width: 100%;
        padding: 12px;
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
    }
    
    .search-wrapper .btn {
        width: 100%;
        margin: 0;
    }
    
    .modal-content {
        padding: 24px 16px;
    }
    
    .node-icon {
        width: 40px;
        height: 40px;
    }
    
    .node-icon svg {
        width: 20px;
        height: 20px;
    }
    
    .node-code {
        font-size: 14px;
    }
}