/*
 * CEFOP DinHot - Dynamic Holographic Optical Tweezers
 * Dark theme with orange accent (optics-themed)
 *
 * Color scheme inspired by laser optics:
 * - Dark background: optical table / lab environment
 * - Orange accent: HeNe laser beam (632nm appears orange-red)
 * - Cyan highlights: secondary laser / focus indicators
 */

/* ============================================================
   Reset & Base
   ============================================================ */

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

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-canvas: #0a0e14;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #484f58;
    --accent-orange: #e8863a;
    --accent-orange-dim: #e8863a80;
    --accent-cyan: #58a6ff;
    --accent-green: #3fb950;
    --accent-red: #f85149;
    --border-color: #30363d;
    --border-focus: #e8863a;
    --font-mono: 'Consolas', 'Menlo', 'Monaco', monospace;
    --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --canvas-size: min(38vw, 450px);
}

html, body {
    height: 100%;
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
}

/* ============================================================
   Layout
   ============================================================ */

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Header */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    min-height: 48px;
}

.app-header h1 {
    font-size: 16px;
    font-weight: 600;
    color: var(--accent-orange);
    letter-spacing: 0.5px;
}

.app-header h1 span {
    color: var(--text-secondary);
    font-weight: 400;
    font-size: 13px;
    margin-left: 8px;
}

.header-status {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-red);
}

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

/* Main content area */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Canvas panels */
.canvas-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 12px;
    min-width: 0;
}

.canvas-panel .panel-title {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.canvas-panel .panel-title::before {
    content: '';
    display: inline-block;
    width: 3px;
    height: 12px;
    background: var(--accent-orange);
    border-radius: 1px;
}

.canvas-wrapper {
    position: relative;
    width: var(--canvas-size);
    height: var(--canvas-size);
    background: var(--bg-canvas);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.canvas-wrapper canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    cursor: crosshair;
}

.canvas-wrapper .canvas-overlay {
    position: absolute;
    bottom: 4px;
    right: 4px;
    font-size: 10px;
    font-family: var(--font-mono);
    color: var(--text-muted);
    pointer-events: none;
}

/* Divider between panels */
.panel-divider {
    width: 1px;
    background: var(--border-color);
    margin: 12px 0;
}

/* Bottom controls */
.controls-bar {
    display: flex;
    align-items: stretch;
    gap: 0;
    padding: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    min-height: 160px;
}

.control-section {
    padding: 12px 16px;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-section:last-child {
    border-right: none;
    flex: 1;
}

.control-section h3 {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

/* Mode selector buttons */
.mode-buttons {
    display: flex;
    gap: 4px;
}

.mode-btn {
    padding: 6px 14px;
    font-size: 12px;
    font-family: var(--font-main);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s;
}

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

.mode-btn.active {
    background: var(--accent-orange);
    color: #fff;
    border-color: var(--accent-orange);
}

/* Parameter inputs */
.param-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.param-row label {
    font-size: 11px;
    color: var(--text-secondary);
    min-width: 80px;
}

.param-row input {
    width: 80px;
    padding: 3px 6px;
    font-size: 12px;
    font-family: var(--font-mono);
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 3px;
}

.param-row input:focus {
    outline: none;
    border-color: var(--border-focus);
}

/* Action buttons */
.action-btn {
    padding: 6px 16px;
    font-size: 12px;
    font-family: var(--font-main);
    font-weight: 500;
    background: var(--accent-orange);
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: opacity 0.15s;
}

.action-btn:hover {
    opacity: 0.85;
}

.action-btn:active {
    opacity: 0.7;
}

.action-btn.secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

/* Info panel */
.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4px 16px;
    font-size: 12px;
    font-family: var(--font-mono);
}

.info-grid .label {
    color: var(--text-secondary);
}

.info-grid .value {
    color: var(--accent-cyan);
}

/* Convergence graph */
.convergence-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 200px;
}

.convergence-canvas-wrapper {
    flex: 1;
    position: relative;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    min-height: 80px;
}

.convergence-canvas-wrapper canvas {
    width: 100%;
    height: 100%;
}

/* Trap list */
.trap-list {
    max-height: 100px;
    overflow-y: auto;
    font-size: 11px;
    font-family: var(--font-mono);
}

.trap-list table {
    width: 100%;
    border-collapse: collapse;
}

.trap-list th {
    text-align: left;
    color: var(--text-muted);
    font-weight: 400;
    padding: 2px 6px;
    border-bottom: 1px solid var(--border-color);
}

.trap-list td {
    padding: 2px 6px;
    color: var(--text-secondary);
}

.trap-list tr:hover td {
    color: var(--text-primary);
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

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

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

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

/* ============================================================
   Help button & Modal
   ============================================================ */

.help-btn {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 700;
    font-family: var(--font-mono);
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.help-btn:hover {
    background: var(--accent-orange);
    color: #fff;
    border-color: var(--accent-orange);
}

.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.65);
    align-items: center;
    justify-content: center;
}

.modal.visible {
    display: flex;
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 32px 36px;
    max-width: 640px;
    max-height: 80vh;
    overflow-y: auto;
    color: var(--text-primary);
    font-size: 13px;
    line-height: 1.6;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.modal-content h2 {
    font-size: 18px;
    color: var(--accent-orange);
    margin-bottom: 16px;
}

.modal-content h3 {
    font-size: 14px;
    color: var(--accent-cyan);
    margin-top: 18px;
    margin-bottom: 6px;
    text-transform: none;
    letter-spacing: normal;
}

.modal-content p,
.modal-content ul,
.modal-content ol {
    margin-bottom: 10px;
    color: var(--text-secondary);
}

.modal-content ul,
.modal-content ol {
    padding-left: 20px;
}

.modal-content li {
    margin-bottom: 4px;
}

.modal-content strong {
    color: var(--text-primary);
}

.modal-close {
    position: absolute;
    top: 12px;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
    transition: color 0.15s;
}

.modal-close:hover {
    color: var(--accent-red);
}

/* ============================================================
   Responsive adjustments
   ============================================================ */

@media (max-width: 1000px) {
    :root {
        --canvas-size: min(42vw, 380px);
    }

    .controls-bar {
        flex-wrap: wrap;
    }

    .control-section {
        min-width: 150px;
    }
}

@media (max-width: 700px) {
    .main-content {
        flex-direction: column;
        overflow-y: auto;
    }

    :root {
        --canvas-size: min(80vw, 350px);
    }

    .panel-divider {
        width: auto;
        height: 1px;
        margin: 0 12px;
    }
}