@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;600&family=Space+Grotesk:wght@500;700&display=swap');

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

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #13131a;
    --bg-tertiary: #1a1a24;
    --bg-hover: #22222f;
    --border-color: #2a2a3f;
    --border-active: #3a3a5f;
    --text-primary: #e5e5f0;
    --text-secondary: #9494b8;
    --text-tertiary: #6b6b8f;
    --accent-blue: #6366f1;
    --accent-purple: #8b5cf6;
    --accent-pink: #ec4899;
    --accent-green: #10b981;
    --accent-orange: #f59e0b;
    --shadow: rgba(0, 0, 0, 0.5);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow: hidden;
}

.app-container {
    display: grid;
    grid-template-columns: 400px 1fr 380px;
    height: 100vh;
    transition: grid-template-columns 0.3s ease;
}

.app-container.right-panel-hidden {
    grid-template-columns: 400px 1fr 0px;
}

/* ===== SIDEBAR COMMON ===== */
.sidebar {
    background: var(--bg-secondary);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-left {
    border-right: 1px solid var(--border-color);
}

.sidebar-right {
    border-left: 1px solid var(--border-color);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.sidebar-right.hidden {
    transform: translateX(100%);
    opacity: 0;
    pointer-events: none;
}

/* Sidebar Header */
.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-tertiary);
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.logo-icon svg {
    width: 22px;
    height: 22px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 4px;
}

.logo-subtitle {
    font-size: 11px;
    color: var(--text-tertiary);
    letter-spacing: 0.5px;
}

.panel-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.panel-title svg {
    width: 20px;
    height: 20px;
    color: var(--accent-blue);
}

.btn-icon {
    width: 36px;
    height: 36px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-primary);
}

.btn-icon:hover {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    transform: scale(1.05);
}

.btn-icon svg {
    width: 18px;
    height: 18px;
}

.btn-icon-header {
    width: 32px;
    height: 32px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-secondary);
}

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

.btn-icon-header svg {
    width: 16px;
    height: 16px;
}

/* Equations Container */
.equations-container {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.equations-container::-webkit-scrollbar,
.right-panel-content::-webkit-scrollbar {
    width: 8px;
}

.equations-container::-webkit-scrollbar-track,
.right-panel-content::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.equations-container::-webkit-scrollbar-thumb,
.right-panel-content::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.equations-container::-webkit-scrollbar-thumb:hover,
.right-panel-content::-webkit-scrollbar-thumb:hover {
    background: var(--border-active);
}

/* Right Panel Content */
.right-panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 0;
}

/* Equation Card */
.equation-card {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 12px;
    transition: all 0.2s;
    animation: slideIn 0.3s ease-out;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.equation-card:hover {
    border-color: var(--border-active);
}

.equation-card.active {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 1px var(--accent-blue);
}

.equation-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.color-indicator {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.color-indicator:hover {
    transform: scale(1.1);
}

.color-indicator::after {
    content: '';
    position: absolute;
    inset: 3px;
    border-radius: 3px;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-icon-small {
    width: 24px;
    height: 24px;
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.btn-icon-small:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-icon-small svg {
    width: 14px;
    height: 14px;
}

/* Equation Input */
.equation-input-wrapper {
    position: relative;
}

.equation-input {
    width: 100%;
    background: var(--bg-primary);
    border: 2px solid transparent;
    border-radius: 8px;
    padding: 12px 14px;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 15px;
    transition: all 0.2s;
    outline: none;
}

.equation-input:focus {
    border-color: var(--accent-blue);
    background: var(--bg-secondary);
}

.equation-input.input-error {
    border-color: #ef4444;
}

.equation-input::placeholder {
    color: var(--text-tertiary);
}

.equation-error {
    color: #ef4444;
    font-size: 11px;
    margin-top: 6px;
    display: none;
}

.equation-input.input-error+.equation-error {
    display: block;
}

/* Autocomplete */
.autocomplete-dropdown {
    position: fixed;
    background: var(--bg-tertiary);
    border: 2px solid var(--accent-blue);
    border-radius: 8px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 10000;
    display: none;
    box-shadow: 0 8px 32px var(--shadow);
}

.autocomplete-dropdown.show {
    display: block;
}

.autocomplete-item {
    padding: 10px 14px;
    cursor: pointer;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--text-secondary);
    transition: all 0.15s;
    border-bottom: 1px solid var(--border-color);
}

.autocomplete-item:last-child {
    border-bottom: none;
}

.autocomplete-item:hover,
.autocomplete-item.active {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Sections */
.section {
    border-top: 1px solid var(--border-color);
    transition: all 0.3s;
}

.section-toggle {
    width: 100%;
    background: transparent;
    border: none;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.section-toggle:hover {
    background: var(--bg-hover);
}

.toggle-icon {
    width: 16px;
    height: 16px;
    transition: transform 0.3s;
}

.section.collapsed .toggle-icon {
    transform: rotate(-90deg);
}

.section-content,
.keyboard-content {
    max-height: 500px;
    overflow: hidden;
    transition: max-height 0.3s ease-out, opacity 0.3s, padding 0.3s;
    opacity: 1;
    padding: 5px 20px 20px 20px;
}

.section.collapsed .section-content,
.section.collapsed .keyboard-content {
    max-height: 0;
    opacity: 0;
    padding: 0 20px;
}

/* Keyboard */
.keyboard-section {
    background: var(--bg-tertiary);
}

.keyboard-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 6px;
}

.key-btn {
    aspect-ratio: 1;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.key-btn:hover {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

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

/* Settings */
.setting-group {
    margin-bottom: 20px;
}

.setting-group:last-child {
    margin-bottom: 0;
}

.setting-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.range-inputs {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.range-input-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.range-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 20px;
}

.range-separator {
    font-size: 12px;
    color: var(--text-tertiary);
}

.range-input-group input {
    flex: 1;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 10px;
    color: var(--text-primary);
    font-size: 13px;
    text-align: center;
}

.range-input-group input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.slider-label {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.slider-value {
    color: var(--accent-blue);
    font-family: 'JetBrains Mono', monospace;
}

input[type="range"] {
    width: 100%;
    height: 6px;
    background: var(--bg-primary);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
    transition: all 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.action-buttons {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
}

.btn-secondary {
    padding: 10px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-primary {
    width: 100%;
    padding: 12px 16px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 12px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

/* Presets */
.presets-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.preset-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
}

.preset-card:hover {
    background: var(--bg-hover);
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

.preset-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.preset-equation {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text-tertiary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ===== RIGHT PANEL COMPONENTS ===== */

/* Analysis Controls */
.analysis-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 16px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 13px;
}

.checkbox-label:hover {
    background: var(--bg-hover);
    border-color: var(--accent-blue);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--accent-blue);
}

.analysis-results {
    display: grid;
    gap: 10px;
    margin-bottom: 12px;
}

.analysis-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
}

.analysis-label {
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.analysis-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 16px;
    font-weight: 600;
    color: var(--accent-blue);
}

/* Select Input */
.select-input {
    width: 100%;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 12px;
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}

.select-input:hover {
    border-color: var(--accent-blue);
}

.select-input:focus {
    outline: none;
    border-color: var(--accent-blue);
    background: var(--bg-secondary);
}

/* Animation Buttons */
.animation-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 12px;
}

.animation-buttons .btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.animation-buttons .btn-secondary svg {
    width: 14px;
    height: 14px;
}

/* Evaluation */
.eval-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 12px;
}

.eval-input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.eval-input-group label {
    font-size: 11px;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.eval-input-group input {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px 12px;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    text-align: center;
}

.eval-input-group input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.eval-result {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px;
    margin: 16px 0;
}

.eval-result-label {
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.eval-result-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 20px;
    font-weight: 600;
    color: var(--accent-green);
}

/* Export Buttons */
.export-buttons {
    display: grid;
    gap: 10px;
}

.btn-export {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
}

.btn-export:hover {
    background: var(--bg-hover);
    border-color: var(--accent-blue);
    transform: translateX(4px);
}

.btn-export svg {
    width: 18px;
    height: 18px;
    color: var(--accent-blue);
    flex-shrink: 0;
}

/* Camera Presets */
.camera-presets {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.btn-camera {
    padding: 10px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-camera:hover {
    background: var(--bg-hover);
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

/* ===== CANVAS AREA ===== */
.canvas-area {
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    position: relative;
}

.canvas-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    z-index: 10;
}

.canvas-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.info-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 12px;
    color: var(--text-secondary);
}

.info-badge svg {
    width: 16px;
    height: 16px;
    color: var(--accent-blue);
}

.canvas-stats {
    display: flex;
    align-items: center;
    gap: 12px;
}

.stat-badge {
    padding: 8px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.stat-label {
    font-size: 11px;
    color: var(--text-tertiary);
    font-weight: 500;
}

.stat-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent-blue);
}

#canvas3d {
    flex: 1;
    display: block;
}

/* Responsive */
@media (max-width: 1400px) {
    .app-container {
        grid-template-columns: 350px 1fr 350px;
    }

    .app-container.right-panel-hidden {
        grid-template-columns: 350px 1fr 0px;
    }
}

@media (max-width: 1024px) {
    .app-container {
        grid-template-columns: 320px 1fr 0px;
    }

    .sidebar-right {
        position: fixed;
        top: 0;
        right: 0;
        width: 100%;
        max-width: 380px;
        height: 100vh;
        z-index: 1000;
        box-shadow: -4px 0 24px var(--shadow);
    }

    .presets-grid,
    .camera-presets {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .app-container {
        grid-template-columns: 1fr;
    }

    .sidebar-left {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        max-width: 400px;
        height: 100vh;
        z-index: 1000;
        transform: translateX(-100%);
        transition: transform 0.3s;
    }

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

    .keyboard-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Toast Notifications */
.toast-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 300px;
    max-width: 500px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    transform: translateX(150%);
    transition: transform 0.3s ease, opacity 0.3s ease;
    opacity: 0;
    z-index: 10000;
}

.toast-notification.show {
    transform: translateX(0);
    opacity: 1;
}

.toast-notification.toast-error {
    border-color: #ef4444;
    background: linear-gradient(135deg, var(--bg-tertiary), rgba(239, 68, 68, 0.1));
}

.toast-notification.toast-success {
    border-color: var(--accent-green);
    background: linear-gradient(135deg, var(--bg-tertiary), rgba(16, 185, 129, 0.1));
}

.toast-notification.toast-info {
    border-color: var(--accent-blue);
    background: linear-gradient(135deg, var(--bg-tertiary), rgba(99, 102, 241, 0.1));
}

.toast-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.toast-message {
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
}