/**
 * WALL HARP SIMULATOR - REDESIGNED UI
 * Inspired by 2w12.one aesthetic
 */

/* ===== RESET & VARIABLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Light Theme (Default) */
    --bg-primary: #fafafa;
    --bg-secondary: #eeeeee;
    --bg-tertiary: #e0e0e0;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --accent: #777777;
    --accent-hover: #555555;
    --border: rgba(0, 0, 0, 0.08);
    --shadow: rgba(0, 0, 0, 0.05);

    /* Spacing */
    --sidebar-width: 320px;
    --sidebar-collapsed: 0px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;

    /* Typography */
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    --font-size-xs: 10px;
    --font-size-sm: 11px;
    --font-size-md: 13px;
    --font-size-lg: 16px;
    --font-size-xl: 20px;
}

/* Dark Theme */
body.theme-dark {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1e1e1e;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-tertiary: #707070;
    --accent: #888888;
    --accent-hover: #aaaaaa;
    --border: rgba(255, 255, 255, 0.08);
    --shadow: rgba(0, 0, 0, 0.3);
}

/* ===== GLOBAL STYLES ===== */
html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: var(--font-mono);
    font-size: var(--font-size-md);
    font-weight: 300;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
}

.app-container {
    display: flex;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

/* ===== SIDEBAR ===== */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: relative;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 100;
    overflow: hidden;
}

.sidebar.collapsed {
    transform: translateX(calc(-1 * var(--sidebar-width)));
}

.sidebar-toggle {
    position: absolute;
    top: var(--spacing-lg);
    right: calc(-40px);
    width: 40px;
    height: 40px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-left: none;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 101;
}

.sidebar-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.sidebar.collapsed .toggle-icon::before {
    content: '[ → ]';
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--spacing-lg);
}

/* Custom Scrollbar */
.sidebar-content::-webkit-scrollbar {
    width: 4px;
}

.sidebar-content::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-content::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.sidebar-content::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* Sidebar Header */
.sidebar-header {
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border);
    margin-bottom: var(--spacing-lg);
}

.app-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.app-subtitle {
    font-size: var(--font-size-xs);
    font-weight: 300;
    letter-spacing: 1px;
    color: var(--text-tertiary);
    text-transform: uppercase;
}

/* Sidebar Sections */
.sidebar-section {
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border);
}

.sidebar-section:last-child {
    border-bottom: none;
}

.section-title {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--text-secondary);
    padding: var(--spacing-md) 0;
    text-transform: uppercase;
    cursor: pointer;
    user-select: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color 0.2s ease;
}

.section-title:hover {
    color: var(--text-primary);
}

.section-title::after {
    content: '[ - ]';
    font-size: 10px;
    transition: transform 0.3s ease;
}

.sidebar-section.collapsed .section-title::after {
    content: '[ + ]';
}

.section-content {
    max-height: 2000px;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease;
    opacity: 1;
    padding-bottom: var(--spacing-lg);
}

.sidebar-section.collapsed .section-content {
    max-height: 0;
    opacity: 0;
    padding-bottom: 0;
}

/* Status Line */
.status-line {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-xs);
}

.status-label {
    color: var(--text-tertiary);
    letter-spacing: 1px;
}

.status-value {
    color: var(--accent);
    font-weight: 400;
}

/* Control Row */
.control-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.control-label {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.control-value {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    font-weight: 400;
}

.control-hint {
    font-size: 9px;
    color: var(--text-tertiary);
    margin-top: var(--spacing-xs);
    line-height: 1.4;
    font-style: italic;
}

/* Range Slider */
.range-slider {
    width: 100%;
    height: 2px;
    background: var(--border);
    outline: none;
    -webkit-appearance: none;
    margin: var(--spacing-sm) 0;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    background: var(--accent);
    cursor: pointer;
    border-radius: 0;
    transition: all 0.2s ease;
}

.range-slider::-webkit-slider-thumb:hover {
    background: var(--accent-hover);
    transform: scale(1.2);
}

.range-slider::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: var(--accent);
    cursor: pointer;
    border: none;
    border-radius: 0;
    transition: all 0.2s ease;
}

.range-slider::-moz-range-thumb:hover {
    background: var(--accent-hover);
    transform: scale(1.2);
}

.range-markers {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    margin-top: var(--spacing-xs);
}

/* Buttons */
.btn {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    font-weight: 400;
    letter-spacing: 1px;
    text-transform: uppercase;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.2s ease;
    margin-bottom: var(--spacing-sm);
}

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

.btn-primary {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
    font-weight: 400;
}

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

.btn-secondary {
    background: transparent;
    border-color: var(--border);
}

.btn-small {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    flex: 1;
}

.button-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xs);
}

/* Mode Selector */
.mode-selector {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xs);
}

.mode-btn {
    padding: var(--spacing-sm);
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    font-weight: 400;
    letter-spacing: 1px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.mode-btn.active {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
}

/* Preset List */
.preset-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.preset-item {
    padding: var(--spacing-sm);
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    font-weight: 300;
    letter-spacing: 1px;
    text-align: left;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.2s ease;
}

.preset-item:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--accent);
    transform: translateX(2px);
}

/* Data Grid */
.data-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.data-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: var(--bg-primary);
    border: 1px solid var(--border);
}

.data-label {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    letter-spacing: 1px;
}

.data-value {
    font-size: var(--font-size-md);
    color: var(--accent);
    font-weight: 400;
}

/* Text Field */
.text-field {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    outline: none;
    margin-bottom: var(--spacing-sm);
    transition: border-color 0.2s ease;
}

.text-field:focus {
    border-color: var(--accent);
}

.text-field::placeholder {
    color: var(--text-tertiary);
    font-size: var(--font-size-xs);
}

/* Select Field */
.select-field {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    outline: none;
    cursor: pointer;
    margin-bottom: var(--spacing-sm);
    transition: border-color 0.2s ease;
}

.select-field:hover,
.select-field:focus {
    border-color: var(--accent);
}

/* Theme Selector */
.theme-selector {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xs);
}

.theme-btn {
    padding: var(--spacing-sm);
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    font-weight: 400;
    letter-spacing: 1px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.2s ease;
}

.theme-btn:hover {
    border-color: var(--accent);
}

.theme-btn.active {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
}

/* Sidebar Footer */
.sidebar-footer {
    padding-top: var(--spacing-lg);
    margin-top: auto;
}

.footer-info {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    text-align: center;
    letter-spacing: 1px;
}

/* ===== MAIN CANVAS ===== */
.main-canvas {
    flex: 1;
    height: 100vh;
    position: relative;
    overflow: auto;
    background: #ffffff;  /* Always white for canvas */
}

.canvas-wrapper {
    width: 100%;
    height: 100%;
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 20px;
    overflow: auto;
}

#canvasContainer {
    display: block;
    width: 100%;
    max-width: none;
}

#canvasContainer canvas {
    display: block;
    width: 100% !important;
    height: auto !important;
}

/* Canvas Overlay */
.canvas-overlay {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    pointer-events: none;
}

.sidebar.collapsed ~ .main-canvas .canvas-overlay {
    left: calc(50% + var(--sidebar-width) / 2);
}

.overlay-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    font-size: var(--font-size-xs);
    letter-spacing: 1px;
    color: var(--text-secondary);
    box-shadow: 0 4px 12px var(--shadow);
}

.separator {
    color: var(--border);
}

/* ===== NOTIFICATIONS ===== */
.notification {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    font-size: var(--font-size-sm);
    letter-spacing: 1px;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
    box-shadow: 0 4px 12px var(--shadow);
}

.notification.notification-error {
    border-color: #ff4444;
}

.notification.notification-success {
    border-color: var(--accent);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 280px;
    }

    .sidebar {
        transform: translateX(calc(-1 * var(--sidebar-width)));
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-toggle {
        right: calc(-50px);
    }
}

@media (max-width: 768px) {
    :root {
        --sidebar-width: 100%;
    }

    .data-grid {
        grid-template-columns: 1fr;
    }

    .overlay-info {
        font-size: 9px;
        padding: var(--spacing-xs) var(--spacing-sm);
        gap: var(--spacing-sm);
    }
}

/* ===== UTILITY CLASSES ===== */
.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.3s ease;
}

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

/* ===== LOADING SPINNER ===== */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top: 3px solid var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}