:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --danger-color: #ef4444;
    --success-color: #22c55e;
    --warning-color: #f59e0b;
    --info-color: #06b6d4;
    --border-color: #334155;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

.login-card {
    background-color: var(--card-bg);
    padding: 2.5rem;
    border-radius: 1rem;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.login-card h1 {
    text-align: center;
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 0.875rem;
}

.input-group {
    margin-bottom: 1.5rem;
}

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

.input-group input {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s;
}

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

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

.input-group label input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
}

.btn-primary {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

.error-message {
    margin-top: 1rem;
    color: var(--danger-color);
    text-align: center;
    font-size: 0.875rem;
}

/* Dashboard */
.dashboard-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
}

.logout-btn {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s;
}

.logout-btn:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

.btn-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.875rem;
    font-weight: 500;
}

.btn-warning:hover {
    background-color: rgba(245, 158, 11, 0.2);
}

.sessions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.session-card {
    background-color: var(--card-bg);
    border-radius: 1rem;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

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

.session-name {
    font-weight: 600;
    font-size: 1.125rem;
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

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

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

.session-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.btn-sm {
    padding: 0.5rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    white-space: nowrap;
}

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

.btn-success:hover {
    background-color: rgba(34, 197, 94, 0.2);
}

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

.btn-danger:hover {
    background-color: rgba(239, 68, 68, 0.2);
}

.btn-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
}

.btn-warning:hover {
    background-color: rgba(245, 158, 11, 0.2);
}

.btn-info {
    background-color: rgba(6, 182, 212, 0.1);
    color: var(--info-color);
    border: 1px solid var(--info-color);
}

.btn-info:hover {
    background-color: rgba(6, 182, 212, 0.2);
}

.btn-sm:not(.btn-success):not(.btn-danger):not(.btn-warning):not(.btn-info) {
    background-color: rgba(148, 163, 184, 0.1);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-sm:not(.btn-success):not(.btn-danger):not(.btn-warning):not(.btn-info):hover {
    background-color: rgba(148, 163, 184, 0.2);
    color: var(--text-primary);
}

.btn-sm:disabled,
.btn-primary:disabled,
.logout-btn:disabled,
.btn-warning:disabled,
.btn-danger:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-sm.loading,
.btn-primary.loading {
    position: relative;
    color: transparent;
}

.btn-sm.loading::after,
.btn-primary.loading::after {
    content: "⏳ Loading...";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    color: var(--text-primary);
}

.loading-spinner {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.qr-container {
    margin-top: 1rem;
    display: flex;
    justify-content: center;
    background: white;
    padding: 1rem;
    border-radius: 0.5rem;
}

.qr-container img {
    max-width: 100%;
    height: auto;
}

.add-session-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 200px;
    border: 2px dashed var(--border-color);
    background-color: transparent;
    cursor: pointer;
    transition: border-color 0.2s;
}

.add-session-card:hover {
    border-color: var(--primary-color);
}

.add-icon {
    font-size: 2rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    width: 100%;
    max-width: 400px;
}

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

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

/* Chat Interface */
.chat-section {
    margin-top: 2rem;
    background-color: var(--card-bg);
    border-radius: 1rem;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.chat-controls {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 1rem;
    margin-bottom: 1rem;
}

.chat-messages {
    height: 300px;
    overflow-y: auto;
    background-color: var(--bg-color);
    border-radius: 0.5rem;
    padding: 1rem;
    margin-bottom: 1rem;
}

.message {
    margin-bottom: 0.5rem;
    padding: 0.5rem;
    border-radius: 0.5rem;
    max-width: 80%;
}

.message.sent {
    background-color: var(--primary-color);
    margin-left: auto;
}

.message.received {
    background-color: var(--border-color);
}

.hidden {
    display: none !important;
}