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

:root {
    --bg-primary: #0d0d0d;
    --bg-secondary: #171717;
    --bg-tertiary: #212121;
    --bg-hover: #2a2a2a;
    --accent: #6b8afd;
    --accent-light: #8ba4ff;
    --accent-dim: rgba(107, 138, 253, 0.1);
    --text: #ececf1;
    --text-secondary: #c5c5d2;
    --text-muted: #8e8ea0;
    --border: #2f2f2f;
    --danger: #ef4444;
    --success: #22c55e;
    --scrollbar: #2f2f2f;
    --scrollbar-hover: #404040;
}

body {
    font-family: 'Söhne', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text);
    min-height: 100vh;
    overflow: hidden;
}

.hidden { display: none !important; }

.app {
    display: flex;
    height: 100vh;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--scrollbar); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--scrollbar-hover); }

.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: transform 0.2s, width 0.2s;
}

.sidebar-header {
    padding: 12px;
}

.new-chat-btn {
    width: 100%;
    padding: 12px 16px;
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: background 0.15s;
}

.new-chat-btn:hover {
    background: var(--bg-hover);
}

.chat-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px 12px;
}

.chat-list-label {
    font-size: 12px;
    color: var(--text-muted);
    padding: 12px 8px 8px;
    font-weight: 500;
}

.chat-item {
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 2px;
    transition: background 0.15s;
    position: relative;
    group: chat;
}

.chat-item:hover, .chat-item.active {
    background: var(--bg-hover);
}

.chat-item i.fa-message { 
    color: var(--text-muted); 
    font-size: 14px;
}

.chat-item .chat-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 14px;
}

.chat-item .chat-actions {
    display: none;
    gap: 4px;
}

.chat-item:hover .chat-actions { display: flex; }

.chat-item .chat-actions button {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
}

.chat-item .chat-actions button:hover {
    color: var(--text);
    background: var(--bg-tertiary);
}

.sidebar-footer {
    padding: 12px;
    border-top: 1px solid var(--border);
}

.user-btn {
    width: 100%;
    padding: 10px 12px;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text);
    transition: background 0.15s;
}

.user-btn:hover { background: var(--bg-hover); }

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 14px;
}

.user-info {
    flex: 1;
    text-align: left;
}

.user-name {
    font-size: 14px;
    font-weight: 500;
}

.user-status {
    font-size: 12px;
    color: var(--text-muted);
}

.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    min-width: 0;
}

.main-header {
    display: none;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    align-items: center;
    justify-content: space-between;
}

.main-header button {
    background: none;
    border: none;
    color: var(--text);
    font-size: 18px;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
}

.main-header button:hover {
    background: var(--bg-hover);
}

.announcements {
    background: var(--accent-dim);
    border-bottom: 1px solid var(--accent);
}

.announcement-item {
    padding: 10px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--accent-light);
}

.chat-area {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.welcome-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    text-align: center;
}

.welcome-logo {
    width: 64px;
    height: 64px;
    background: var(--bg-tertiary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.welcome-logo i {
    font-size: 28px;
    color: var(--accent);
}

.welcome-screen h1 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text);
}

.welcome-screen p {
    font-size: 16px;
    color: var(--text-muted);
    max-width: 600px;
    line-height: 1.5;
}

.messages-container {
    flex: 1;
    overflow-y: auto;
}

.messages {
    max-width: 768px;
    margin: 0 auto;
    padding: 24px 16px;
}

.message {
    padding: 24px 0;
    animation: fadeIn 0.3s;
}

.message + .message {
    border-top: 1px solid var(--border);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.message-inner {
    display: flex;
    gap: 16px;
    max-width: 100%;
}

.message-avatar {
    width: 28px;
    height: 28px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.message.user .message-avatar {
    background: var(--accent);
    color: white;
}

.message.assistant .message-avatar {
    background: var(--bg-tertiary);
    color: var(--accent);
}

.message-body {
    flex: 1;
    min-width: 0;
}

.message-role {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 8px;
}

.message-content {
    line-height: 1.7;
    font-size: 15px;
    word-wrap: break-word;
}

.message-content p {
    margin-bottom: 12px;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content pre {
    background: var(--bg-secondary);
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 16px 0;
    border: 1px solid var(--border);
}

.message-content code {
    font-family: 'Söhne Mono', 'Fira Code', monospace;
    font-size: 14px;
}

.message-content :not(pre) > code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 14px;
}

.thinking-block {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 16px;
    overflow: hidden;
}

.thinking-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-muted);
    transition: background 0.15s;
}

.thinking-header:hover {
    background: var(--bg-hover);
}

.thinking-header i:first-child {
    color: var(--accent);
}

.thinking-header .toggle-icon {
    margin-left: auto;
    transition: transform 0.2s;
}

.thinking-header.collapsed .toggle-icon {
    transform: rotate(-90deg);
}

.thinking-content {
    padding: 0 16px 16px;
    font-size: 14px;
    color: var(--text-secondary);
    white-space: pre-wrap;
    line-height: 1.6;
    max-height: 300px;
    overflow-y: auto;
}

.thinking-content.collapsed {
    display: none;
}

.message-meta {
    display: flex;
    gap: 16px;
    margin-top: 12px;
    font-size: 12px;
    color: var(--text-muted);
}

.message-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.input-area {
    padding: 16px;
    background: linear-gradient(transparent, var(--bg-primary) 50%);
    position: relative;
}

.input-wrapper {
    max-width: 768px;
    margin: 0 auto;
}

.input-options {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    flex-wrap: wrap;
    align-items: center;
}

.model-select-wrapper {
    position: relative;
    flex: 1;
    min-width: 200px;
}

.model-select {
    width: 100%;
    padding: 10px 36px 10px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 14px;
    cursor: pointer;
    appearance: none;
}

.model-select-wrapper::after {
    content: '\f078';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    font-size: 12px;
}

.model-select option { background: var(--bg-secondary); }
.model-select option:disabled { color: var(--text-muted); }

.reasoning-select {
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 14px;
}

.file-btn {
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-muted);
    transition: all 0.15s;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.file-btn:hover {
    color: var(--text);
    border-color: var(--text-muted);
}

.files-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.file-tag {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
}

.file-tag i { color: var(--accent); }

.file-tag .remove {
    cursor: pointer;
    color: var(--text-muted);
    margin-left: 4px;
}

.file-tag .remove:hover { color: var(--danger); }

.input-box {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 12px 16px;
    transition: border-color 0.15s;
}

.input-box:focus-within {
    border-color: var(--accent);
}

.input-box textarea {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text);
    font-size: 15px;
    resize: none;
    outline: none;
    font-family: inherit;
    line-height: 1.5;
    min-height: 24px;
    max-height: 200px;
}

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

.send-btn {
    width: 32px;
    height: 32px;
    background: var(--accent);
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, opacity 0.15s;
    flex-shrink: 0;
}

.send-btn:hover { background: var(--accent-light); }
.send-btn:disabled { 
    background: var(--bg-hover); 
    color: var(--text-muted); 
    cursor: not-allowed; 
}

.token-info {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 10px;
    font-size: 12px;
    color: var(--text-muted);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
    backdrop-filter: blur(4px);
}

.modal.hidden { display: none; }

.modal-content {
    background: var(--bg-secondary);
    padding: 24px;
    border-radius: 16px;
    width: 100%;
    max-width: 400px;
    position: relative;
    border: 1px solid var(--border);
    animation: modalIn 0.2s;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.modal-content h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--text-muted);
    padding: 4px;
    line-height: 1;
}

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

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 14px;
    transition: border-color 0.15s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
}

.btn {
    padding: 12px 20px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background 0.15s;
    text-decoration: none;
}

.btn:hover { background: var(--accent-light); }
.btn-block { width: 100%; }
.btn-secondary { 
    background: var(--bg-tertiary); 
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-hover); }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #dc2626; }

.modal-divider {
    height: 1px;
    background: var(--border);
    margin: 20px 0;
}

.modal-link {
    text-align: center;
    margin-top: 16px;
    font-size: 14px;
    color: var(--text-muted);
}

.modal-link a {
    color: var(--accent);
    text-decoration: none;
}

.modal-link a:hover { text-decoration: underline; }

.settings-menu {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.settings-item {
    padding: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: background 0.15s;
    color: var(--text);
    text-decoration: none;
}

.settings-item:hover { background: var(--bg-hover); }

.settings-item i {
    width: 20px;
    color: var(--text-muted);
}

.settings-item.danger { color: var(--danger); }
.settings-item.danger i { color: var(--danger); }

.settings-item.admin {
    background: var(--accent-dim);
    border-color: var(--accent);
}

.settings-item.admin i { color: var(--accent); }

.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 8px 0;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-4px); opacity: 1; }
}

.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
    display: none;
}

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

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: 100;
        transform: translateX(-100%);
    }
    
    .sidebar.open { transform: translateX(0); }
    
    .main-header { display: flex; }
    
    .input-options {
        flex-direction: column;
        align-items: stretch;
    }
    
    .model-select-wrapper {
        min-width: 100%;
    }
    
    .input-options > *:not(.model-select-wrapper) {
        width: auto;
    }
    
    .input-row {
        display: flex;
        gap: 8px;
    }
    
    .input-row > * {
        flex: 1;
    }
}

.admin-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 16px;
}

.admin-header h1 {
    font-size: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.admin-header h1 i { color: var(--accent); }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.stat-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    color: var(--text-muted);
    font-size: 14px;
}

.stat-card-header i {
    color: var(--accent);
}

.stat-card-value {
    font-size: 28px;
    font-weight: 600;
}

.admin-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 10px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    transition: all 0.15s;
}

.tab-btn:hover { background: var(--bg-hover); }

.tab-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.tab-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
}

.search-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.search-bar input {
    flex: 1;
    padding: 10px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 14px;
}

.search-bar button {
    padding: 10px 16px;
    background: var(--accent);
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
}

.data-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.data-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s;
}

.data-item:hover { background: var(--bg-hover); }

.data-item .id { 
    color: var(--accent); 
    font-weight: 600;
    min-width: 60px;
}

.data-item .name { flex: 1; }
.data-item .date { color: var(--text-muted); font-size: 13px; }
.data-item .badge { 
    background: var(--accent); 
    color: white; 
    padding: 2px 8px; 
    border-radius: 4px; 
    font-size: 12px; 
}

.detail-section {
    margin-bottom: 24px;
}

.detail-section h3 {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ip-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.ip-tag {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    transition: background 0.15s;
}

.ip-tag:hover { background: var(--bg-hover); }

.ban-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ban-form select, .ban-form input {
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 14px;
}

.announcement-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
    padding: 16px;
    background: var(--bg-tertiary);
    border-radius: 8px;
}

.announcement-form textarea {
    padding: 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    resize: vertical;
    min-height: 80px;
    font-family: inherit;
}

.announcement-form .row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.announcement-form .row > * {
    flex: 1;
    min-width: 150px;
}

.announcement-form select, 
.announcement-form input[type="datetime-local"] {
    padding: 10px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
}