/* CSS Variables */
:root {
    --bg: #0f172a;
    --bg-secondary: #1e293b;
    --card-bg: #1e293b;
    --border: #334155;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --danger: #ef4444;
    --success: #22c55e;
}

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

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

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.nav-brand a {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
}

.nav-brand a:hover {
    text-decoration: none;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-muted);
}

.nav-links a:hover {
    color: var(--text);
    text-decoration: none;
}

.nav-user {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.btn-logout {
    color: var(--danger) !important;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-secondary);
    color: var(--text);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn:hover {
    background: var(--border);
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

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

.btn-danger {
    background: var(--danger);
    border-color: var(--danger);
    color: white;
}

.btn-danger:hover {
    opacity: 0.9;
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

.btn-full {
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    font-size: 0.875rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg);
    color: var(--text);
}

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

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

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

.card-header h2,
.card-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.card-body {
    padding: 1rem;
}

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

.card-actions {
    display: flex;
    gap: 0.5rem;
}

/* Alerts */
.alert {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

/* Login Page */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

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

.login-box {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
}

.login-box h1 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.login-subtitle {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.login-form {
    text-align: left;
}

.login-note {
    margin-top: 1.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Dashboard */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

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

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.card-wide {
    grid-column: span 2;
}

@media (max-width: 768px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    .card-wide {
        grid-column: span 1;
    }
}

/* Agent List */
.agent-list {
    list-style: none;
}

.agent-item {
    margin-bottom: 0.5rem;
}

.agent-link {
    display: block;
    padding: 0.75rem;
    border-radius: 6px;
    background: var(--bg);
    transition: background 0.15s ease;
}

.agent-link:hover {
    background: var(--border);
    text-decoration: none;
}

.agent-name {
    display: block;
    font-weight: 500;
    color: var(--text);
}

.agent-path {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: monospace;
}

/* Agents Page */
.agents-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1rem;
}

.agent-card .card-body {
    min-height: 120px;
}

.agent-desc {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.agent-details {
    font-size: 0.875rem;
}

.agent-details dt {
    color: var(--text-muted);
    font-weight: 500;
    margin-top: 0.5rem;
}

.agent-details dd {
    margin-left: 0;
}

.agent-details code {
    font-size: 0.75rem;
    background: var(--bg);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

/* Session List */
.session-list {
    list-style: none;
}

.session-item {
    display: flex;
    align-items: center;
    padding: 0.5rem;
    font-size: 0.875rem;
}

.session-item.running {
    color: var(--success);
}

.session-indicator {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    margin-right: 0.5rem;
    animation: pulse 1.5s infinite;
}

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

/* Status Badge */
.status {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    font-size: 0.75rem;
    border-radius: 4px;
    text-transform: capitalize;
}

.status-active {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success);
}

.status-running {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
}

.status-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.status-completed {
    background: rgba(148, 163, 184, 0.1);
    color: var(--text-muted);
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    font-size: 0.75rem;
    font-weight: 600;
    background: var(--bg);
    border-radius: 10px;
}

.badge-active {
    background: var(--success);
    color: white;
}

/* Table */
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.table th,
.table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.table th {
    font-weight: 500;
    color: var(--text-muted);
}

.table tbody tr:hover {
    background: var(--bg);
}

/* Empty State */
.empty-state {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.empty-state-large {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-state-large h2 {
    margin-bottom: 0.5rem;
}

.empty-state-large p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    margin: 1rem;
}

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

.modal-header h2 {
    font-size: 1.125rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
}

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

.modal-body {
    padding: 1rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    padding: 1rem;
    border-top: 1px solid var(--border);
}

/* Utility */
code {
    font-family: 'SF Mono', Monaco, 'Courier New', monospace;
}

hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 1rem 0;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h3 {
    font-size: 1rem;
}

/* Mobile Responsive */
@media (max-width: 640px) {
    /* Navbar */
    .navbar {
        flex-direction: column;
        gap: 0.75rem;
        padding: 0.75rem 1rem;
    }

    .nav-links {
        width: 100%;
        justify-content: space-between;
        gap: 0.5rem;
        flex-wrap: wrap;
    }

    .nav-user {
        display: none;
    }

    /* Container */
    .container {
        padding: 1rem;
    }

    /* Page header */
    .page-header {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }

    .page-header h1 {
        font-size: 1.25rem;
    }

    /* Buttons - larger touch targets */
    .btn {
        padding: 0.75rem 1rem;
        font-size: 1rem;
        min-height: 44px;
    }

    .btn-sm {
        padding: 0.5rem 0.75rem;
        font-size: 0.875rem;
        min-height: 36px;
    }

    /* Forms - larger inputs */
    .form-group input,
    .form-group textarea,
    .form-group select {
        padding: 0.875rem;
        font-size: 1rem;
    }

    /* Agents grid */
    .agents-grid {
        grid-template-columns: 1fr;
    }

    /* Cards */
    .card-header {
        flex-direction: column;
        gap: 0.75rem;
        align-items: stretch;
    }

    .card-actions {
        justify-content: stretch;
    }

    .card-actions .btn {
        flex: 1;
    }

    /* Tables - horizontal scroll */
    .table-wrapper {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .table {
        min-width: 500px;
    }

    /* Modal */
    .modal-content {
        margin: 0.5rem;
        max-height: 95vh;
        border-radius: 8px;
    }

    .modal-footer {
        flex-direction: column;
    }

    .modal-footer .btn {
        width: 100%;
    }

    /* Login */
    .login-box {
        padding: 1.5rem;
    }

    .login-box h1 {
        font-size: 1.25rem;
    }

    /* Chat - full width, no sidebar */
    .chat-container {
        grid-template-columns: 1fr !important;
    }

    .chat-sidebar {
        display: none !important;
    }

    .chat-header {
        flex-direction: column;
        gap: 0.5rem;
        align-items: stretch;
    }

    .chat-input {
        font-size: 16px; /* Prevents zoom on iOS */
    }

    /* Agent details */
    .agent-details code {
        word-break: break-all;
        display: block;
    }
}

/* Tablet */
@media (max-width: 1024px) and (min-width: 641px) {
    .agents-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }

    .chat-container {
        grid-template-columns: 200px 1fr !important;
    }
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {
    .btn:hover {
        background: var(--bg-secondary);
    }

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

    .agent-link:hover {
        background: var(--bg);
    }
}