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

:root {
    --accent: #00ffff;
    --accent-dim: rgba(0, 255, 255, 0.3);
    --accent-glow: rgba(0, 255, 255, 0.5);
    --bg-dark: #050510;
    --bg-panel: rgba(5, 5, 16, 0.95);
    --text: #e0e0e0;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    overflow: hidden;
    background: var(--bg-dark);
    color: var(--accent);
}

/* ===== NAVIGATION ===== */
.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--accent-dim);
    backdrop-filter: blur(10px);
    z-index: 500;
}

.nav-back {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--accent);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.nav-back:hover {
    background: var(--accent-dim);
    text-shadow: 0 0 10px var(--accent);
}

.nav-back svg {
    flex-shrink: 0;
}

.nav-title {
    font-size: 16px;
    font-weight: 600;
    text-shadow: 0 0 10px var(--accent);
}

.nav-help {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--accent-dim);
    border-radius: 50%;
    background: transparent;
    color: var(--accent);
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-help:hover {
    background: var(--accent-dim);
    box-shadow: 0 0 15px var(--accent-glow);
}

/* ===== CANVAS ===== */
#canvas-container {
    width: 100vw;
    height: 100vh;
    padding-top: 56px;
    position: relative;
}

/* ===== LOADING ===== */
#loading {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    background: var(--bg-dark);
    color: var(--accent);
    font-size: 18px;
    text-shadow: 0 0 10px var(--accent), 0 0 20px var(--accent);
    z-index: 1000;
    pointer-events: none;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--accent-dim);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ===== CONTROLS HINT ===== */
.controls-hint {
    position: fixed;
    bottom: 20px;
    left: 20px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: var(--bg-panel);
    border: 1px solid var(--accent-dim);
    border-radius: 12px;
    padding: 14px 16px;
    max-width: 280px;
    backdrop-filter: blur(10px);
    z-index: 100;
    animation: fadeInUp 0.5s ease 1s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.controls-hint.hidden {
    display: none;
}

.hint-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-dim);
    border-radius: 8px;
    color: var(--accent);
}

.hint-text {
    flex: 1;
}

.hint-text p {
    font-size: 12px;
    line-height: 1.5;
    margin: 0;
    color: rgba(0, 255, 255, 0.8);
}

.hint-text p:first-child {
    margin-bottom: 6px;
    color: var(--accent);
}

.hint-close {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--accent);
    font-size: 18px;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.2s ease;
}

.hint-close:hover {
    opacity: 1;
}

/* ===== INFO PANEL ===== */
#info-panel {
    position: fixed;
    top: 76px;
    right: 20px;
    width: 360px;
    max-width: calc(100vw - 40px);
    max-height: calc(100vh - 116px);
    overflow-y: auto;
    background: var(--bg-panel);
    border: 2px solid var(--accent);
    border-radius: 16px;
    padding: 20px;
    color: var(--accent);
    box-shadow: 0 0 30px var(--accent-glow), inset 0 0 30px rgba(0, 255, 255, 0.05);
    z-index: 200;
    backdrop-filter: blur(15px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#info-panel.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateX(20px);
}

.info-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--accent-dim);
}

#info-panel h2 {
    font-size: 18px;
    font-weight: 600;
    text-shadow: 0 0 10px var(--accent);
    margin: 0;
}

#close-btn {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    line-height: 1;
    transition: all 0.2s ease;
}

#close-btn:hover {
    background: var(--accent-dim);
    box-shadow: 0 0 15px var(--accent);
}

#component-description {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text);
}

#component-description strong {
    color: var(--accent);
}

/* ===== HELP MODAL ===== */
.help-modal {
    position: fixed;
    inset: 0;
    z-index: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.help-modal.hidden {
    display: none;
}

.help-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}

.help-content {
    position: relative;
    width: 100%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    background: var(--bg-panel);
    border: 2px solid var(--accent);
    border-radius: 16px;
    box-shadow: 0 0 40px var(--accent-glow);
}

.help-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--accent-dim);
}

.help-header h3 {
    font-size: 18px;
    font-weight: 600;
    text-shadow: 0 0 10px var(--accent);
    margin: 0;
}

.help-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--accent);
    border-radius: 50%;
    color: var(--accent);
    font-size: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.help-close:hover {
    background: var(--accent-dim);
}

.help-body {
    padding: 20px;
}

.help-section {
    margin-bottom: 20px;
}

.help-section:last-child {
    margin-bottom: 0;
}

.help-section h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--accent);
}

.help-section p {
    font-size: 13px;
    line-height: 1.6;
    color: var(--text);
}

.help-section ul {
    list-style: none;
    padding: 0;
}

.help-section li {
    font-size: 13px;
    line-height: 1.6;
    color: var(--text);
    padding: 4px 0;
    padding-left: 16px;
    position: relative;
}

.help-section li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.help-section li strong {
    color: var(--accent);
}

/* ===== MOBILE STYLES ===== */
@media (max-width: 768px) {
    .nav-bar {
        height: 48px;
        padding: 0 12px;
    }
    
    .nav-back span {
        display: none;
    }
    
    .nav-title {
        font-size: 14px;
    }
    
    .nav-help {
        width: 36px;
        height: 36px;
    }
    
    #canvas-container {
        padding-top: 48px;
    }
    
    .controls-hint {
        left: 10px;
        right: 10px;
        bottom: 10px;
        max-width: none;
    }
    
    #info-panel {
        top: auto;
        bottom: 10px;
        left: 10px;
        right: 10px;
        width: auto;
        max-height: 50vh;
    }
    
    #info-panel h2 {
        font-size: 16px;
    }
    
    #component-description {
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .nav-bar {
        height: 44px;
    }
    
    .nav-back {
        padding: 6px 10px;
    }
    
    .nav-title {
        font-size: 13px;
    }
    
    #canvas-container {
        padding-top: 44px;
    }
    
    #info-panel {
        max-height: 45vh;
        padding: 16px;
    }
    
    .help-content {
        max-height: 90vh;
        border-radius: 12px;
    }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.3);
}

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

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