/* CSS Variables */
:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --accent-primary: #e94560;
    --accent-secondary: #533483;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --success: #4ade80;
    --warning: #fbbf24;
    --error: #ef4444;
    --border-radius: 8px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

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

html, body {
    height: 100%;
    overflow: hidden;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* App Layout */
#app {
    display: grid;
    grid-template-rows: auto 1fr;
    grid-template-columns: 1fr auto;
    height: 100vh;
    gap: 0;
}

/* Header */
#header {
    grid-column: 1 / -1;
    background: var(--bg-secondary);
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--bg-tertiary);
    box-shadow: var(--shadow);
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    gap: 20px;
}

.header-content h1 {
    font-size: 1.4rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.device-badge {
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.device-badge.left {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}

.device-badge.right {
    background: linear-gradient(135deg, #10b981, #059669);
}

.status-bar {
    display: flex;
    gap: 20px;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--error);
    transition: background 0.3s ease;
}

.status-dot.connected {
    background: var(--success);
    box-shadow: 0 0 8px var(--success);
}

.status-dot.connecting {
    background: var(--warning);
    animation: pulse 1s infinite;
}

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

/* Canvas Container */
#canvas-container {
    position: relative;
    background: var(--bg-primary);
    overflow: hidden;
    cursor: default;
}

#main-canvas {
    display: block;
    width: 100%;
    height: 100%;
    touch-action: none;
}

/* Edge Indicators */
.edge-indicator {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--accent-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.edge-indicator.left {
    left: 0;
}

.edge-indicator.right {
    right: 0;
}

.edge-indicator.active {
    opacity: 1;
    box-shadow: 0 0 20px var(--accent-primary);
}

/* Control Panel */
#control-panel {
    width: 280px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--bg-tertiary);
    padding: 20px;
    overflow-y: auto;
}

.panel-section {
    margin-bottom: 24px;
}

.panel-section h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--bg-tertiary);
}

/* Buttons */
.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 12px 16px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-bottom: 10px;
}

.btn-icon {
    font-size: 1.1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), #c73e54);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(233, 69, 96, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-secondary:hover {
    background: #1a4a7a;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Debug Info */
.debug-info {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 12px;
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 0.8rem;
}

.debug-row {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    border-bottom: 1px solid var(--bg-tertiary);
}

.debug-row:last-child {
    border-bottom: none;
}

.debug-row span:first-child {
    color: var(--text-secondary);
}

.debug-row span:last-child {
    color: var(--accent-primary);
    font-weight: 600;
}

/* Instructions */
.instructions {
    list-style: none;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.instructions li {
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
    border-bottom: 1px solid var(--bg-tertiary);
}

.instructions li:last-child {
    border-bottom: none;
}

.instructions li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

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

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--bg-secondary);
    padding: 30px;
    border-radius: var(--border-radius);
    max-width: 500px;
    width: 90%;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.modal-content h2 {
    margin-bottom: 16px;
    color: var(--accent-primary);
}

#bluetooth-status-message {
    padding: 16px;
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.modal-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.modal-actions .btn {
    flex: 1;
    min-width: 120px;
}

.device-list {
    max-height: 200px;
    overflow-y: auto;
}

.device-item {
    padding: 12px;
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 12px;
}

.device-item:hover {
    background: var(--bg-tertiary);
    transform: translateX(4px);
}

.device-item .device-icon {
    font-size: 1.5rem;
}

.device-item .device-name {
    font-weight: 500;
}

.bluetooth-note {
    margin-top: 20px;
    padding: 12px;
    background: rgba(233, 69, 96, 0.1);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--accent-primary);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.bluetooth-note strong {
    color: var(--text-primary);
}

.bluetooth-note ul {
    margin-top: 8px;
    margin-left: 16px;
}

.bluetooth-note li {
    margin: 4px 0;
}

/* Signal Modal */
.signal-section {
    margin-bottom: 16px;
}

.signal-section label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.signal-section textarea {
    width: 100%;
    padding: 12px;
    background: var(--bg-primary);
    border: 1px solid var(--bg-tertiary);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 0.8rem;
    resize: vertical;
}

.signal-section textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.signal-section .btn {
    margin-top: 8px;
    width: auto;
    padding: 8px 16px;
}

/* Responsive */
@media (max-width: 768px) {
    #app {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr auto;
    }
    
    #control-panel {
        grid-column: 1;
        grid-row: 3;
        width: 100%;
        max-height: 40vh;
        border-left: none;
        border-top: 1px solid var(--bg-tertiary);
    }

    #canvas-container {
        grid-column: 1;
        grid-row: 2;
    }
    
    .header-content h1 {
        font-size: 1.1rem;
    }
    
    .status-bar {
        gap: 12px;
    }
    
    .modal-content {
        max-width: 95%;
        padding: 20px;
    }
}

/* In-page Debug Console */
.debug-console {
    position: fixed;
    left: 10px;
    bottom: 10px;
    width: min(420px, calc(100vw - 20px));
    max-height: min(240px, 40vh);
    background: rgba(10, 12, 20, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
    z-index: 2000;
    backdrop-filter: blur(6px);
    overflow: hidden;
}

.debug-console.hidden {
    display: none;
}

.debug-console__bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 8px 10px;
    background: rgba(255, 255, 255, 0.06);
    border-bottom: 1px solid rgba(255, 255, 255, 0.10);
}

.debug-console__title {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.6px;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.75);
    user-select: none;
}

.debug-console__actions {
    display: flex;
    gap: 6px;
}

.debug-console__btn {
    font-size: 12px;
    padding: 6px 8px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.06);
    color: rgba(255, 255, 255, 0.85);
    cursor: pointer;
}

.debug-console__btn:hover {
    background: rgba(255, 255, 255, 0.10);
}

.debug-console__body {
    padding: 8px 10px;
    overflow: auto;
    max-height: calc(min(240px, 40vh) - 44px);
}

.debug-console.collapsed .debug-console__body {
    display: none;
}

.debug-console__lines {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 11px;
    line-height: 1.35;
    white-space: pre-wrap;
    word-break: break-word;
}

.debug-console__line {
    padding: 2px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.debug-console__line:last-child {
    border-bottom: none;
}

.debug-console__line--log { color: rgba(255, 255, 255, 0.86); }
.debug-console__line--warn { color: rgba(251, 191, 36, 0.95); }
.debug-console__line--error { color: rgba(239, 68, 68, 0.95); }

/* Rectangle hover state */
.canvas-grabbing {
    cursor: grabbing !important;
}

.canvas-grab {
    cursor: grab;
}

/* Connection animation */
@keyframes connection-pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(74, 222, 128, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(74, 222, 128, 0);
    }
}

.status-dot.connected {
    animation: connection-pulse 2s infinite;
}

/* Approval Modal Styles */
.approval-modal {
    text-align: center;
}

.approval-message {
    padding: 20px;
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.approval-message p {
    margin: 10px 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.approval-icon {
    font-size: 3rem;
    margin-bottom: 12px;
}

.approval-icon.rejected {
    opacity: 0.7;
}

.device-info-box {
    background: var(--bg-tertiary);
    padding: 12px 20px;
    border-radius: var(--border-radius);
    margin: 16px 0;
}

.device-id-label {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.approval-hint {
    font-size: 0.85rem !important;
    color: var(--text-secondary) !important;
    opacity: 0.8;
}

/* Success/Danger button variants */
.btn-success {
    background: linear-gradient(135deg, var(--success), #22c55e);
    color: white;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 222, 128, 0.4);
}

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

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
}

/* Waiting spinner */
.waiting-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--bg-tertiary);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    margin: 0 auto 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Overlay to block interaction while waiting for approval */
.app-blocked {
    pointer-events: none;
    opacity: 0.5;
    filter: blur(2px);
}