:root {
    --bg: #0c0c0f;
    --bg-elevated: #16161a;
    --bg-hover: #1e1e24;
    --bg-active: #26262e;
    --border: #2e2e38;
    --border-light: #3a3a48;
    --text: #ececf1;
    --text-secondary: #a1a1aa;
    --text-muted: #6b6b76;
    --accent: #7c3aed;
    --accent-hover: #8b5cf6;
    --accent-glow: rgba(124, 58, 237, 0.25);
    --accent-subtle: rgba(124, 58, 237, 0.1);
    --success: #10b981;
    --success-glow: rgba(16, 185, 129, 0.2);
    --warning: #f59e0b;
    --error: #ef4444;
    --error-glow: rgba(239, 68, 68, 0.2);
    --gradient-accent: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
    --gradient-dark: linear-gradient(180deg, #16161a 0%, #0c0c0f 100%);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--accent-glow);
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }

.vektor-app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Navigation */
.vektor-nav {
    display: flex;
    align-items: center;
    gap: 2rem;
    padding: 0 2rem;
    height: 64px;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: rgba(22, 22, 26, 0.85);
}

.vektor-logo {
    font-weight: 700;
    font-size: 1.25rem;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    letter-spacing: -0.03em;
    transition: var(--transition-fast);
}

.vektor-logo:hover {
    filter: brightness(1.2);
}

.vektor-nav-links {
    display: flex;
    gap: 0.5rem;
    flex: 1;
}

.vektor-nav-links a {
    padding: 0.5rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.vektor-nav-links a:hover {
    color: var(--text);
    background: var(--bg-hover);
}

.vektor-nav-links a.active {
    color: var(--text);
    background: var(--bg-active);
}

.vektor-nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
}

.vektor-nav-user {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.9rem;
}

.vektor-username {
    color: var(--text-secondary);
    font-weight: 500;
}

.vektor-nav-user a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.vektor-nav-user a:hover {
    color: var(--accent-hover);
}

/* Main content */
.vektor-main {
    flex: 1;
    padding: 2.5rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 8px var(--accent-glow); }
    50% { box-shadow: 0 0 16px var(--accent-glow); }
}

/* Page header */
.vektor-header {
    margin-bottom: 2.5rem;
    animation: slideUp 0.5s ease;
}

.vektor-header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--text) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.vektor-header p {
    color: var(--text-muted);
    font-size: 1rem;
}

/* Cards */
.vektor-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    animation: slideUp 0.5s ease backwards;
}

.vektor-card:hover {
    border-color: var(--border-light);
    box-shadow: var(--shadow-md);
}

.vektor-card + .vektor-card {
    margin-top: 1.25rem;
    animation-delay: 0.1s;
}

/* Forms */
.vektor-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.vektor-field {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.vektor-field label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.vektor-input,
.vektor-textarea,
.vektor-select {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.875rem 1rem;
    color: var(--text);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.vektor-input:hover,
.vektor-textarea:hover,
.vektor-select:hover {
    border-color: var(--border-light);
}

.vektor-input:focus,
.vektor-textarea:focus,
.vektor-select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.vektor-textarea {
    min-height: 140px;
    resize: vertical;
}

.vektor-input::placeholder,
.vektor-textarea::placeholder {
    color: var(--text-muted);
}

/* Buttons */
.vektor-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    background: var(--gradient-accent);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
    box-shadow: var(--shadow-sm), 0 0 0 0 var(--accent-glow);
    position: relative;
    overflow: hidden;
}

.vektor-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
    opacity: 0;
    transition: var(--transition-fast);
}

.vektor-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.vektor-btn:hover::before {
    opacity: 1;
}

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

.vektor-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.vektor-btn-secondary {
    background: var(--bg-hover);
    color: var(--text);
    box-shadow: var(--shadow-sm);
}

.vektor-btn-secondary:hover {
    background: var(--bg-active);
    box-shadow: var(--shadow-md);
}

.vektor-btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

.vektor-btn-danger {
    background: linear-gradient(135deg, #dc2626 0%, #ef4444 100%);
}

.vektor-btn-danger:hover {
    box-shadow: var(--shadow-md), 0 0 20px var(--error-glow);
}

/* Messages/Alerts */
.vektor-alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideUp 0.3s ease;
}

.vektor-alert::before {
    font-size: 1.1rem;
}

.vektor-alert-success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(16, 185, 129, 0.05) 100%);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--success);
}

.vektor-alert-success::before { content: '✓'; }

.vektor-alert-error {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(239, 68, 68, 0.05) 100%);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--error);
}

.vektor-alert-error::before { content: '!'; }

/* Lists */
.vektor-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.vektor-list-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition-smooth);
    animation: slideUp 0.4s ease backwards;
}

.vektor-list-item:nth-child(1) { animation-delay: 0s; }
.vektor-list-item:nth-child(2) { animation-delay: 0.05s; }
.vektor-list-item:nth-child(3) { animation-delay: 0.1s; }
.vektor-list-item:nth-child(4) { animation-delay: 0.15s; }
.vektor-list-item:nth-child(5) { animation-delay: 0.2s; }

.vektor-list-item:hover {
    border-color: var(--accent);
    background: var(--bg-hover);
    box-shadow: var(--shadow-md), 0 0 0 1px var(--accent-glow);
    transform: translateX(4px);
}

.vektor-list-item-content {
    flex: 1;
    min-width: 0;
}

.vektor-list-item-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.vektor-list-item-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* File explorer */
.vektor-files {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
}

.vektor-file {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem 1rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-smooth);
    text-decoration: none;
    color: var(--text);
    animation: slideUp 0.4s ease backwards;
}

.vektor-file:hover {
    border-color: var(--accent);
    background: var(--bg-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.vektor-file-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
    transition: var(--transition-fast);
}

.vektor-file:hover .vektor-file-icon {
    transform: scale(1.1);
}

.vektor-file-name {
    font-size: 0.85rem;
    font-weight: 500;
    text-align: center;
    word-break: break-word;
    max-width: 100%;
}

.vektor-file-size {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Chat */
.vektor-chat-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 1.25rem;
    height: calc(100vh - 140px);
}

.vektor-chat-sidebar {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
}

.vektor-chat-sidebar-header {
    padding: 1.25rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--gradient-dark);
}

.vektor-chat-sidebar-header h2 {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.vektor-chat-rooms {
    flex: 1;
    overflow-y: auto;
}

.vektor-chat-room {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 1rem 1.25rem;
    cursor: pointer;
    transition: var(--transition-fast);
    border-bottom: 1px solid var(--border);
    position: relative;
}

.vektor-chat-room:hover {
    background: var(--bg-hover);
}

.vektor-chat-room.active {
    background: var(--bg-active);
}

.vektor-chat-room.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: var(--accent);
    border-radius: 0 2px 2px 0;
}

.vektor-chat-room-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 700;
    color: white;
    box-shadow: var(--shadow-sm);
}

.vektor-chat-room-info {
    flex: 1;
    min-width: 0;
}

.vektor-chat-room-name {
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.vektor-chat-room-preview {
    font-size: 0.8rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.vektor-chat-room-unread {
    background: var(--gradient-accent);
    color: white;
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    border-radius: 10px;
    font-weight: 700;
    box-shadow: var(--shadow-sm);
    animation: pulse 2s infinite;
}

.vektor-chat-main {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.vektor-chat-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--gradient-dark);
}

.vektor-chat-header h2 {
    font-size: 1.1rem;
    font-weight: 700;
}

.vektor-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-elevated) 100%);
}

.vektor-message {
    display: flex;
    gap: 0.75rem;
    max-width: 75%;
    animation: slideUp 0.3s ease;
}

.vektor-message-own {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.vektor-message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--border);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.vektor-message-content {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    padding: 0.875rem 1.125rem;
    border-radius: var(--radius-lg);
    border-bottom-left-radius: 4px;
    box-shadow: var(--shadow-sm);
}

.vektor-message-own .vektor-message-content {
    background: var(--gradient-accent);
    border: none;
    border-bottom-left-radius: var(--radius-lg);
    border-bottom-right-radius: 4px;
}

.vektor-message-sender {
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--text-secondary);
}

.vektor-message-own .vektor-message-sender {
    color: rgba(255,255,255,0.7);
}

.vektor-message-text {
    font-size: 0.9rem;
    word-break: break-word;
    line-height: 1.5;
}

.vektor-message-time {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
}

.vektor-message-own .vektor-message-time {
    color: rgba(255,255,255,0.5);
}

.vektor-chat-composer {
    padding: 1.25rem 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 0.75rem;
    background: var(--bg-elevated);
}

.vektor-chat-composer input {
    flex: 1;
}

/* Dropzone */
.vektor-dropzone {
    border: 2px dashed var(--border);
    border-radius: var(--radius-xl);
    padding: 3.5rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-smooth);
    background: linear-gradient(135deg, var(--bg) 0%, var(--bg-elevated) 100%);
}

.vektor-dropzone:hover,
.vektor-dropzone.dragover {
    border-color: var(--accent);
    background: linear-gradient(135deg, var(--accent-subtle) 0%, var(--bg-elevated) 100%);
    box-shadow: var(--shadow-glow);
}

.vektor-dropzone-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.3));
    transition: var(--transition-fast);
}

.vektor-dropzone:hover .vektor-dropzone-icon {
    transform: scale(1.1) translateY(-4px);
}

.vektor-dropzone-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.vektor-dropzone-text strong {
    color: var(--accent-hover);
    font-weight: 600;
}

/* Upload progress */
.vektor-upload-progress {
    background: var(--bg);
    border-radius: var(--radius);
    padding: 1rem;
    margin-top: 1rem;
    border: 1px solid var(--border);
}

.vektor-upload-progress-bar {
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.vektor-upload-progress-fill {
    height: 100%;
    background: var(--gradient-accent);
    transition: width 0.3s ease;
    box-shadow: 0 0 8px var(--accent-glow);
}

/* Tabs */
.vektor-tabs {
    display: flex;
    gap: 0.25rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 2rem;
    padding-bottom: 0;
}

.vektor-tab {
    padding: 0.875rem 1.5rem;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: var(--transition-fast);
}

.vektor-tab:hover {
    color: var(--text-secondary);
}

.vektor-tab.active {
    color: var(--text);
    border-bottom-color: var(--accent);
}

/* Empty states */
.vektor-empty {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
    animation: fadeIn 0.5s ease;
}

.vektor-empty-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    filter: grayscale(0.3) drop-shadow(0 4px 8px rgba(0,0,0,0.3));
    animation: pulse 3s infinite;
}

.vektor-empty h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

/* Badge */
.vektor-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.vektor-badge-success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(16, 185, 129, 0.1) 100%);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.vektor-badge-warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2) 0%, rgba(245, 158, 11, 0.1) 100%);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.3);
    animation: pulse 2s infinite;
}

.vektor-badge-error {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2) 0%, rgba(239, 68, 68, 0.1) 100%);
    color: var(--error);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Share link display */
.vektor-share-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--bg);
    padding: 0.875rem 1rem;
    border-radius: var(--radius);
    margin-top: 1rem;
    border: 1px solid var(--border);
    animation: slideUp 0.3s ease;
}

.vektor-share-link input {
    flex: 1;
    background: none;
    border: none;
    color: var(--accent-hover);
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.9rem;
}

.vektor-share-link input:focus {
    outline: none;
}

/* Modal */
.vektor-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
}

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

.vektor-modal {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    transform: scale(0.95) translateY(10px);
    transition: var(--transition-smooth);
}

.vektor-modal-backdrop.open .vektor-modal {
    transform: scale(1) translateY(0);
}

.vektor-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.vektor-modal-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
}

.vektor-modal-close {
    background: var(--bg-hover);
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    line-height: 1;
    border-radius: var(--radius);
    transition: var(--transition-fast);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* Actions bar */
.vektor-actions {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

/* Breadcrumbs */
.vektor-breadcrumbs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    padding: 0.75rem 1rem;
    background: var(--bg-elevated);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.vektor-breadcrumbs a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.vektor-breadcrumbs a:hover {
    color: var(--accent-hover);
}

.vektor-breadcrumbs span {
    color: var(--text);
    font-weight: 500;
}

/* Skeleton loading */
.vektor-skeleton {
    background: linear-gradient(90deg, var(--bg-hover) 25%, var(--bg-active) 50%, var(--bg-hover) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius);
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Status indicator */
.vektor-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.vektor-status::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 8px var(--success-glow);
    animation: pulse 2s infinite;
}

.vektor-status-offline::before {
    background: var(--text-muted);
    box-shadow: none;
    animation: none;
}

/* Responsive */
@media (max-width: 768px) {
    .vektor-nav {
        flex-wrap: wrap;
        height: auto;
        padding: 1rem;
        gap: 0.75rem;
    }

    .vektor-nav-links {
        order: 3;
        width: 100%;
        justify-content: center;
        padding-top: 0.75rem;
        border-top: 1px solid var(--border);
    }

    .vektor-main {
        padding: 1.5rem;
    }

    .vektor-chat-layout {
        grid-template-columns: 1fr;
    }

    .vektor-chat-sidebar {
        display: none;
    }

    .vektor-chat-sidebar.mobile-open {
        display: flex;
        position: fixed;
        inset: 0;
        z-index: 200;
        border-radius: 0;
    }

    .vektor-files {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }

    .vektor-header h1 {
        font-size: 1.5rem;
    }
}

/* Toast notifications */
.vektor-toast {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    padding: 1rem 1.5rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    z-index: 2000;
    animation: slideUp 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.vektor-toast-success {
    border-color: var(--success);
    box-shadow: var(--shadow-lg), 0 0 12px var(--success-glow);
}

.vektor-toast-error {
    border-color: var(--error);
    box-shadow: var(--shadow-lg), 0 0 12px var(--error-glow);
}