:root {
    --bg-primary: #0a0f1a;
    --bg-secondary: #111927;
    --bg-tertiary: #1a2332;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --border: #1e293b;
    --shadow: rgba(0,0,0,0.3);
}

[data-theme='light'] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --border: #e2e8f0;
    --shadow: rgba(0,0,0,0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: all 0.3s ease;
    overflow-x: hidden;
}

.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 12px;
}

/* Header - Mobile Optimized */
.header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--shadow);
    flex-wrap: wrap;
    gap: 8px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    flex: 1;
    min-width: 0;
}

.logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent);
    white-space: nowrap;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    background: var(--bg-tertiary);
    white-space: nowrap;
}

.logout-btn {
    cursor: pointer;
    border: none;
    color: var(--text-primary);
    transition: all 0.2s;
    font-family: inherit;
}

.logout-btn:hover {
    background: var(--danger);
    color: white;
    transform: scale(1.02);
}

.logout-btn:active {
    transform: scale(0.98);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-dot.connected {
    background: var(--success);
}

.status-dot.disconnected {
    background: var(--danger);
}

.status-dot.running {
    background: var(--warning);
}

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

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.health-info {
    display: flex;
    gap: 12px;
    font-size: 11px;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.health-item {
    display: flex;
    align-items: center;
    gap: 4px;
    white-space: nowrap;
}

.health-label {
    font-weight: 600;
    color: var(--text-primary);
}

.theme-toggle {
    background: var(--bg-tertiary);
    border: none;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 16px;
    transition: all 0.2s;
    min-width: 40px;
}

.theme-toggle:hover {
    background: var(--accent);
    transform: scale(1.05);
}

/* Cards - Mobile Optimized */
.card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
    box-shadow: 0 2px 8px var(--shadow);
}

.card-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

/* Control Row - Mobile Responsive */
.control-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

@media(min-width:640px) {
    .control-row {
        grid-template-columns: auto 1fr 1fr;
    }
}

.radio-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 13px;
    flex: 1;
    justify-content: center;
    min-width: 100px;
}

.radio-label:hover {
    background: var(--accent);
    color: white;
}

.radio-label input {
    cursor: pointer;
}

.radio-label input:checked ~ span {
    font-weight: 600;
}

/* Buttons - Mobile Optimized */
.btn {
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
    width: 100%;
    text-align: center;
}

.btn:active {
    transform: scale(0.98);
}

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

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

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

.btn-danger:active {
    background: #dc2626;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-secondary:active {
    background: var(--accent);
    color: white;
}

/* Terminal - Mobile Optimized */
#terminal {
    width: 100%;
    height: 400px;
    overflow-y: auto;
    overflow-x: auto;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    line-height: 1.5;
    margin-bottom: 10px;
    border: 1px solid var(--border);
}

#terminal::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

#terminal::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

#terminal::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

#input {
    width: 100%;
    padding: 12px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    margin-bottom: 16px;
    transition: all 0.2s;
}

#input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

/* Actions Grid - Mobile Responsive */
.actions-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

@media(min-width:640px) {
    .actions-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media(min-width:1024px) {
    .actions-grid {
        grid-template-columns: repeat(7, 1fr);
    }
}

/* Modal - Mobile Optimized */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
    z-index: 1000;
    animation: fadeIn 0.2s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 95%;
    max-width: 600px;
    max-height: 90vh;
    background: var(--bg-secondary);
    border-radius: 0 0 16px 16px;
    box-shadow: 0 20px 60px var(--shadow);
    z-index: 1001;
    overflow: hidden;
    animation: slideDownModal 0.3s;
}

@keyframes slideDownModal {
    from {
        transform: translateX(-50%) translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
}

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

.modal-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-body {
    padding: 20px;
    max-height: calc(90vh - 140px);
    overflow-y: auto;
}

.modal-body::-webkit-scrollbar {
    width: 6px;
}

.modal-body::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

.modal-body::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

.form-group {
    margin-bottom: 14px;
}

.form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input, .form-textarea {
    width: 100%;
    padding: 10px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 13px;
    transition: all 0.2s;
}

.form-input:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

.form-textarea {
    min-height: 70px;
    font-family: 'Courier New', monospace;
    resize: vertical;
}

.form-hint {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 4px;
    font-style: italic;
}

.modal-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 8px;
}

.modal-footer .btn {
    flex: 1;
}

#tr069Summary {
    margin-top: 14px;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    height: 300px;
    overflow-y: auto;
    font-size: 11px;
    font-family: 'Courier New', monospace;
    line-height: 1.4;
    white-space: pre-wrap;
    border: 1px solid var(--border);
}

/* Top Sheet Selector - Updated to Centered Modal Approach for Compatibility */
.selector-modal {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 95%;
    max-width: 500px;
    max-height: 70vh;
    background: var(--bg-secondary);
    border-radius: 16px;
    box-shadow: 0 20px 60px var(--shadow);
    z-index: 1001;
    overflow-y: auto;
    animation: fadeInScale 0.3s;
}

.selector-modal::-webkit-scrollbar {
    width: 6px;
}

.selector-modal::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

.selector-modal::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

@keyframes fadeInScale {
    from { 
        transform: translate(-50%, -50%) scale(0.9);
        opacity: 0;
    }
    to { 
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
}

.selector-option {
    padding: 16px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 14px;
}

.selector-option:active {
    background: var(--bg-tertiary);
}

.selector-option.selected {
    background: var(--accent);
    color: white;
    font-weight: 600;
}

.onu-input-modal {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 95%;
    max-width: 400px;
    background: var(--bg-secondary);
    border-radius: 16px;
    box-shadow: 0 20px 60px var(--shadow);
    z-index: 1001;
    padding: 20px;
    text-align: center;
    animation: fadeInScale 0.3s;
}

/* Sheet Header - Updated for Centered Modals */
.sheet-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sheet-close-btn {
    background: var(--bg-tertiary);
    border: none;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    font-size: 14px;
    cursor: pointer;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

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

.onu-input-modal input {
    width: 100%;
    max-width: 200px;
    margin: 12px auto;
    display: block;
    text-align: center;
    font-size: 16px;
}

/* Collapsible Card Titles */
.collapsible-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
    padding: 4px 0;
    margin-bottom: 12px;
    border-radius: 6px;
    transition: color 0.2s;
}

.collapsible-title:hover {
    color: var(--accent);
}

.chevron {
    font-size: 10px;
    color: var(--text-secondary);
    transition: color 0.2s;
    flex-shrink: 0;
}

.collapsible-title:hover .chevron {
    color: var(--accent);
}

.chevron.collapsed {
    color: var(--text-secondary);
}

/* Clients Modal Styles */
.client-item {
    padding: 12px;
    margin-bottom: 8px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.client-user {
    color: var(--accent);
    font-weight: 600;
    font-size: 14px;
}

.client-ip {
    color: var(--text-secondary);
    font-size: 12px;
}

/* Mobile Specific */
@media(max-width:640px) {
    .container {
        padding: 8px;
    }
    .header {
        padding: 10px 12px;
    }
    .header-left {
        width: 100%;
        justify-content: flex-start;
    }
    .header-right {
        width: 100%;
        justify-content: flex-end;
    }
    .card {
        padding: 12px;
    }
    .logo {
        font-size: 16px;
    }
    #terminal {
        height: 300px;
        font-size: 11px;
    }
}

/* Small phones - Force wrap */
@media(max-width:400px) {
    .header-left {
        gap: 6px;
    }
    .health-info {
        flex-wrap: wrap;
        gap: 8px;
    }
}
/* Clear Terminal Button */
.clear-terminal-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 2px 8px;
    border-radius: 5px;
    font-size: 10px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s;
    white-space: nowrap;
    line-height: 1.4;
}

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

.clear-terminal-btn:active {
    transform: scale(0.95);
}

/* Active Preset Indicator */
#activePresetIndicator {
    animation: fadeIn 0.3s ease-in;
    box-shadow: 0 1px 3px rgba(59, 130, 246, 0.3);
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

/* Save Current Preset Button */
#saveCurrentPresetBtn {
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-10px); }
    to { opacity: 1; transform: translateX(0); }
}

/* Delete Preset Button */
#deletePresetBtn {
    animation: slideIn 0.3s ease-out 0.1s both;
}

/* Bridge Preset Controls - Sleek Style */
#bridgePresetSelect {
    transition: all 0.2s ease;
}

#bridgePresetSelect:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

/* Compact button styling for preset controls */
.btn[onclick*="Preset"], 
.btn[onclick*="resetBridge"] {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s ease;
}

.btn[onclick*="Preset"]:hover, 
.btn[onclick*="resetBridge"]:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px var(--shadow);
}

.btn[onclick*="Preset"]:active, 
.btn[onclick*="resetBridge"]:active {
    transform: translateY(0);
}

/* Responsive preset controls */
@media(max-width:640px) {
    #bridgePresetSelect {
        min-width: 120px !important;
    }
}