:root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --border-color: #4a4a4a;
    --shadow: rgba(0,0,0,0.3);
    --accent-primary: #667eea;
    --accent-secondary: #764ba2;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
}

[data-theme="light"] {
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f3f4f6;
    --text-primary: #333;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow: rgba(0,0,0,0.1);
}

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

ul {
    list-style: none;
}

.small {
    font-size: 0.9em;
}

.is-hidden {
    display: none !important;
}

.block {
    display: block;
}

.text-danger {
    color: var(--danger);
}

.text-success {
    color: var(--success);
}

.text-warning {
    color: var(--warning);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #1e3a8a 0%, #581c87 100%);
    min-height: 100vh;
    padding: 12px;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

[data-theme="light"] body {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.button-group {
    display: flex;
    gap: 10px;
}

.button {
    background: rgba(255,255,255,0.2);
    border: 2px solid rgba(255,255,255,0.3);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.2em;
    transition: all 0.3s;
    min-width: 48px;
}

.button:hover {
    background: rgba(255,255,255,0.3);
    transform: scale(1.05);
}

h1 {
    color: white;
    font-size: clamp(1.5em, 4vw, 2.5em);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 6px var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
    margin-bottom: 20px;
}

.card-title {
    font-size: clamp(1.1em, 3vw, 1.4em);
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--accent-primary);
    border-bottom: 2px solid var(--accent-primary);
    padding-bottom: 8px;
}

.main-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 8px;
    overflow-x: auto;
}

.main-tab {
    padding: 12px 24px;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.7);
    transition: all 0.3s;
    white-space: nowrap;
    font-size: clamp(0.9em, 2.2vw, 1.1em);
}

.main-tab:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.main-tab.active {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.main-tab-content {
    animation: fadeIn 0.3s ease-in;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: clamp(0.85em, 2vw, 1em);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    width: auto;
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-decoration: none;
}

.btn-block {
    width: 100%;
}

.btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
    color: white;
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning) 0%, #d97706 100%);
    color: white;
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.8em;
    width: auto;
}

.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85em;
    font-weight: 600;
    margin-left: 8px;
}

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

.status-badge.disconnected {
    background: var(--danger);
    color: white;
}

.status-badge.pending {
    background: var(--warning);
    color: white;
}

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

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.form-input {
    width: 100%;
    padding: 10px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1em;
    background: var(--bg-primary);
    color: var(--text-primary);
}

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

.form-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    margin: 8px 0;
    background: var(--bg-tertiary);
    border-radius: 8px;
}

.info-label {
    font-weight: 500;
    color: var(--text-secondary);
}

.info-value {
    font-weight: 600;
    color: var(--text-primary);
}

.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 14px 20px;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    animation: slideIn 0.3s ease-out;
    z-index: 1000;
    max-width: 90vw;
}

.notification.success { background: var(--success); }
.notification.error { background: var(--danger); }
.notification.warning { background: var(--warning); }

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
    font-style: italic;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 24px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@media (max-width: 768px) {
    body {
        padding: 8px;
    }

    .card {
        padding: 14px;
    }

    .notification {
        top: 10px;
        right: 10px;
        left: 10px;
        max-width: calc(100vw - 20px);
    }
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--text-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-primary);
}