/* ========================================
   AI Session Dashboard — Design System
   Dark Mode + Glassmorphism
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ── CSS Variables ── */
:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.7);
    --bg-glass: rgba(255, 255, 255, 0.03);
    --bg-glass-hover: rgba(255, 255, 255, 0.06);
    --bg-input: rgba(255, 255, 255, 0.05);
    --bg-input-focus: rgba(255, 255, 255, 0.08);
    
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-active: rgba(139, 92, 246, 0.4);
    
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-accent: #a78bfa;
    
    --accent-purple: #8b5cf6;
    --accent-purple-light: #a78bfa;
    --accent-blue: #3b82f6;
    --accent-cyan: #06b6d4;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --accent-orange: #f59e0b;
    --accent-pink: #ec4899;
    
    --gradient-primary: linear-gradient(135deg, #8b5cf6, #3b82f6);
    --gradient-gemini: linear-gradient(135deg, #3b82f6, #06b6d4);
    --gradient-chatgpt: linear-gradient(135deg, #10b981, #059669);
    --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.05), rgba(255,255,255,0.01));
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow-purple: 0 0 20px rgba(139, 92, 246, 0.15);
    --shadow-glow-blue: 0 0 20px rgba(59, 130, 246, 0.15);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    
    --sidebar-width: 260px;
    --header-height: 64px;
}

/* ── Reset & Base ── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

/* ── Layout ── */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* ── Sidebar ── */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    z-index: 100;
    transition: transform var(--transition-slow);
}

.sidebar-header {
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--border-subtle);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-logo .logo-icon {
    width: 38px;
    height: 38px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: var(--shadow-glow-purple);
}

.sidebar-logo h1 {
    font-size: 1.15rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}

.sidebar-logo .version {
    font-size: 0.65rem;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 0.05em;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 10px;
    overflow-y: auto;
}

.nav-section-label {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 12px 12px 6px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
    font-size: 0.87rem;
    font-weight: 500;
    position: relative;
    border: 1px solid transparent;
    margin-bottom: 2px;
}

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

.nav-item.active {
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent-purple-light);
    border-color: rgba(139, 92, 246, 0.2);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 24px;
    background: var(--gradient-primary);
    border-radius: 0 3px 3px 0;
}

.nav-item .icon {
    font-size: 1.1rem;
    width: 22px;
    text-align: center;
}

.sidebar-footer {
    padding: 14px 16px;
    border-top: 1px solid var(--border-subtle);
}

.server-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-green);
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
    animation: pulse 2s infinite;
}

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

/* ── Main Content ── */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-primary);
}

.content-header {
    height: var(--header-height);
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.content-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.content-body {
    flex: 1;
    overflow-y: auto;
    padding: 24px 28px;
}

/* ── Page Panels ── */
.page-panel {
    display: none;
    height: 100%;
}

.page-panel.active {
    display: flex;
    flex-direction: column;
}

/* ── Chat Interface ── */
.chat-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    max-height: calc(100vh - var(--header-height));
}

.chat-toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 28px;
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
    flex-shrink: 0;
    flex-wrap: wrap;
}

.target-toggle {
    display: flex;
    background: var(--bg-input);
    border-radius: var(--radius-full);
    padding: 3px;
    border: 1px solid var(--border-subtle);
}

.target-btn {
    padding: 7px 18px;
    border-radius: var(--radius-full);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 6px;
}

.target-btn.active {
    color: white;
    box-shadow: var(--shadow-sm);
}

.target-btn.gemini.active {
    background: var(--gradient-gemini);
}

.target-btn.chatgpt.active {
    background: var(--gradient-chatgpt);
}

.session-input-group {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.session-input-group label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.session-input {
    padding: 7px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.8rem;
    width: 180px;
    transition: border-color var(--transition-fast);
}

.session-input:focus {
    outline: none;
    border-color: var(--border-active);
    background: var(--bg-input-focus);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px 28px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.chat-welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    gap: 16px;
    opacity: 0.7;
}

.chat-welcome .welcome-icon {
    font-size: 3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.chat-welcome h3 {
    font-size: 1.3rem;
    font-weight: 600;
}

.chat-welcome p {
    color: var(--text-muted);
    font-size: 0.85rem;
    max-width: 400px;
}

.message {
    display: flex;
    gap: 12px;
    max-width: 85%;
    animation: messageIn 0.3s ease;
}

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

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

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    flex-shrink: 0;
    font-weight: 600;
}

.message.user .message-avatar {
    background: var(--gradient-primary);
}

.message.ai .message-avatar {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
}

.message-bubble {
    padding: 12px 16px;
    border-radius: var(--radius-lg);
    font-size: 0.88rem;
    line-height: 1.6;
    word-wrap: break-word;
    white-space: pre-wrap;
}

.message.user .message-bubble {
    background: var(--gradient-primary);
    color: white;
    border-bottom-right-radius: 4px;
}

.message.ai .message-bubble {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
    backdrop-filter: blur(10px);
}

.message-meta {
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-top: 4px;
    text-align: right;
}

.message.ai .message-meta {
    text-align: left;
}

/* Typing indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 4px 0;
}

.typing-indicator span {
    width: 7px;
    height: 7px;
    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(-6px); opacity: 1; }
}

/* Chat input */
.chat-input-area {
    padding: 16px 28px 20px;
    border-top: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.chat-input-wrapper {
    display: flex;
    gap: 10px;
    align-items: flex-end;
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 4px 4px 4px 16px;
    transition: border-color var(--transition-fast);
}

.chat-input-wrapper:focus-within {
    border-color: var(--border-active);
    box-shadow: var(--shadow-glow-purple);
}

.chat-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    padding: 10px 0;
    resize: none;
    max-height: 120px;
    line-height: 1.5;
}

.chat-input:focus { outline: none; }

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

.send-btn {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    border: none;
    background: var(--gradient-primary);
    color: white;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.send-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow-purple);
}

.send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

/* ── Cards ── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(12px);
    overflow: hidden;
}

.card-header {
    padding: 18px 22px;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-body {
    padding: 22px;
}

/* ── Form Elements ── */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.form-input, .form-textarea, .form-select {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.85rem;
    transition: all var(--transition-fast);
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
    outline: none;
    border-color: var(--border-active);
    background: var(--bg-input-focus);
    box-shadow: var(--shadow-glow-purple);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
    font-family: 'Courier New', monospace;
    font-size: 0.78rem;
    line-height: 1.5;
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    box-shadow: var(--shadow-glow-purple);
    transform: translateY(-1px);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.25);
}

.btn-ghost {
    background: var(--bg-glass);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
}

.btn-ghost:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

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

/* ── Status Badge ── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 600;
}

.badge-success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-green);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent-orange);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-error {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* ── Cookie Manager ── */
.cookie-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* ── Session Monitor ── */
.session-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 18px;
    text-align: center;
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-card .stat-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 4px;
}

.session-list {
    list-style: none;
}

.session-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-subtle);
    transition: background var(--transition-fast);
}

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

.session-item:last-child {
    border-bottom: none;
}

.session-item-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* ── API Reference ── */
.api-endpoint {
    margin-bottom: 20px;
}

.api-endpoint .method {
    display: inline-block;
    padding: 3px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 700;
    font-family: monospace;
    margin-right: 8px;
}

.api-endpoint .method.post {
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent-blue);
}

.api-endpoint .path {
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: var(--text-accent);
}

.api-endpoint .description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.code-block {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    font-family: 'Courier New', monospace;
    font-size: 0.75rem;
    color: var(--accent-green);
    overflow-x: auto;
    white-space: pre;
    line-height: 1.6;
    position: relative;
    margin-top: 8px;
}

.copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 4px 10px;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.65rem;
    cursor: pointer;
    font-family: inherit;
    transition: all var(--transition-fast);
}

.copy-btn:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

/* ── Toast Notifications ── */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 20px;
    border-radius: var(--radius-md);
    font-size: 0.82rem;
    font-weight: 500;
    backdrop-filter: blur(12px);
    border: 1px solid;
    animation: toastIn 0.3s ease, toastOut 0.3s ease 3s forwards;
    max-width: 380px;
}

.toast.success {
    background: rgba(16, 185, 129, 0.15);
    border-color: rgba(16, 185, 129, 0.3);
    color: var(--accent-green);
}

.toast.error {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--accent-red);
}

.toast.info {
    background: rgba(59, 130, 246, 0.15);
    border-color: rgba(59, 130, 246, 0.3);
    color: var(--accent-blue);
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
    from { opacity: 1; }
    to { opacity: 0; transform: translateX(40px); }
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        height: 100vh;
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .cookie-grid, .session-grid {
        grid-template-columns: 1fr;
    }
    
    .chat-toolbar {
        padding: 12px 16px;
    }
    
    .chat-messages {
        padding: 16px;
    }
    
    .chat-input-area {
        padding: 12px 16px 16px;
    }
    
    .content-body {
        padding: 16px;
    }
    
    .content-header {
        padding: 0 16px;
    }

    .message {
        max-width: 95%;
    }

    .session-input-group {
        margin-left: 0;
        width: 100%;
    }

    .session-input {
        flex: 1;
    }

    .mobile-menu-btn {
        display: flex !important;
    }
}

.mobile-menu-btn {
    display: none;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.1rem;
}

/* ── Loading Spinner ── */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-subtle);
    border-top: 2px solid var(--accent-purple);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ── Empty State ── */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    text-align: center;
    color: var(--text-muted);
}

.empty-state .icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
    opacity: 0.5;
}

/* System prompt toggle */
.system-prompt-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.75rem;
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.system-prompt-toggle:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.system-prompt-area {
    display: none;
    padding: 0 28px 12px;
    background: var(--bg-secondary);
}

.system-prompt-area.visible {
    display: block;
}

.system-prompt-input {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.82rem;
    resize: none;
    height: 60px;
}

.system-prompt-input:focus {
    outline: none;
    border-color: var(--border-active);
}

.system-prompt-input::placeholder {
    color: var(--text-muted);
}