:root {
    --primary: #25D366;
    --primary-dark: #128C7E;
    --secondary: #34B7F1;
    --dark: #111B21;
    --dark-light: #1F2C33;
    --dark-lighter: #2A3942;
    --text: #E9EDEF;
    --text-secondary: #8696A0;
    --border: #2A3942;
    --success: #00A884;
    --warning: #F7C244;
    --danger: #EA4335;
    --radius: 12px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

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

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

.hidden {
    display: none !important;
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
}

.login-card {
    background: var(--dark-light);
    padding: 3rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 400px;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.logo {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.login-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--text-secondary);
}

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 1rem;
    transition: all 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* Buttons */
.btn {
    padding: 0.875rem 1.5rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--dark-lighter);
    color: var(--text);
}

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

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

.btn-block {
    width: 100%;
}

.error-text {
    color: var(--danger);
    font-size: 0.875rem;
    margin-top: 0.5rem;
    text-align: center;
}

/* Dashboard Layout */
#dashboard-page {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--dark-light);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.sidebar-header {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.logo-small {
    font-size: 1.5rem;
}

.sidebar-header span {
    font-weight: 700;
    font-size: 1.125rem;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
}

.nav-item:hover {
    color: var(--text);
    background: var(--dark-lighter);
}

.nav-item.active {
    color: var(--primary);
    background: rgba(37, 211, 102, 0.1);
    border-right: 3px solid var(--primary);
}

.nav-icon {
    font-size: 1.25rem;
}

.sidebar-footer {
    padding: 1rem 0;
    border-top: 1px solid var(--border);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    min-height: 100vh;
}

.top-bar {
    padding: 1.25rem 2rem;
    background: var(--dark-light);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 50;
}

.top-bar h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: var(--dark-lighter);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.content-section {
    padding: 2rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background: var(--dark-light);
    padding: 1.5rem;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 1rem;
    border: 1px solid var(--border);
}

.stat-icon {
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
    background: var(--dark);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    display: block;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

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

.card-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

.mt-4 {
    margin-top: 1.5rem;
}

/* Quick Actions */
.quick-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Sessions Grid */
.sessions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
}

.session-card {
    background: var(--dark);
    border-radius: 10px;
    padding: 1.25rem;
    border: 1px solid var(--border);
}

.session-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.session-name {
    font-weight: 600;
    font-size: 1rem;
}

.session-status {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.session-status.connected {
    background: rgba(0, 168, 132, 0.2);
    color: var(--success);
}

.session-status.disconnected {
    background: rgba(234, 67, 53, 0.2);
    color: var(--danger);
}

.session-status.qr {
    background: rgba(247, 194, 68, 0.2);
    color: var(--warning);
}

.session-info {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

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

.session-actions .btn {
    flex: 1;
    padding: 0.5rem;
    font-size: 0.8rem;
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--dark-light);
    border-radius: var(--radius);
    width: 100%;
    max-width: 450px;
    box-shadow: var(--shadow);
}

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

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

.modal-body {
    padding: 2rem;
}

.text-center {
    text-align: center;
}

#qr-container {
    margin: 1.5rem 0;
    min-height: 256px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#qr-container img {
    background: white;
    padding: 1rem;
    border-radius: 8px;
}

.qr-loading {
    color: var(--text-secondary);
}

.status-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Result Box */
.result-box {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 8px;
    background: var(--dark);
}

.result-box.success {
    border-left: 4px solid var(--success);
}

.result-box.error {
    border-left: 4px solid var(--danger);
}

/* Progress */
.progress-box {
    margin-top: 1.5rem;
}

.progress-bar {
    height: 8px;
    background: var(--dark);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--primary);
    width: 0%;
    transition: width 0.3s;
}

/* Table */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 0.875rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
}

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

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

.header-actions input {
    padding: 0.5rem 1rem;
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
}

/* Documentation */
.docs-content {
    max-width: 800px;
}

.docs-content h4 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.code-block {
    background: var(--dark);
    padding: 1rem;
    border-radius: 8px;
    display: block;
    overflow-x: auto;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.875rem;
    margin-bottom: 1rem;
    white-space: pre;
}

.endpoint {
    background: var(--dark);
    border-radius: 8px;
    padding: 1.25rem;
    margin-bottom: 1rem;
}

.endpoint-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.method {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
}

.method.post {
    background: var(--primary);
    color: var(--dark);
}

.method.get {
    background: var(--secondary);
    color: var(--dark);
}

.method.delete {
    background: var(--danger);
    color: white;
}

.endpoint p {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.endpoint pre {
    margin: 0;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}