/* =====================================================
   TERASYNTH LUNAR RE-FORGE SYSTEM - DIGITAL TWIN
   Light Theme | NASA-Grade Professional UI
   ===================================================== */

/* CSS Variables */
:root {
    /* Primary Colors */
    --nasa-blue: #0B3D91;
    --nasa-red: #FC3D21;
    --nasa-blue-light: #1E5BC6;
    --nasa-blue-dark: #062554;
    
    /* Light Theme Colors */
    --bg-primary: #F8F9FC;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #EEF1F8;
    --bg-hover: #E8ECF4;
    
    /* Text Colors */
    --text-primary: #1A1F36;
    --text-secondary: #4A5568;
    --text-tertiary: #718096;
    --text-inverse: #FFFFFF;
    
    /* Border Colors */
    --border-light: #E2E8F0;
    --border-medium: #CBD5E0;
    --border-dark: #A0AEC0;
    
    /* Status Colors */
    --status-success: #10B981;
    --status-warning: #F59E0B;
    --status-error: #EF4444;
    --status-info: #3B82F6;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Spacing */
    --panel-width: 340px;
    --header-height: 64px;
    --status-bar-height: 36px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-primary);
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* =====================================================
   LOADING SCREEN
   ===================================================== */

.loading-screen {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-tertiary) 100%);
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.fade-out {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    animation: fadeInUp 0.6s ease-out;
}

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

.loading-logo {
    margin-bottom: 24px;
}

.loading-icon {
    width: 80px;
    height: 80px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.8; }
}

.loading-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--nasa-blue);
    letter-spacing: 8px;
    margin-bottom: 8px;
}

.loading-logo-img {
    width: 160px;
    height: auto;
    margin-bottom: 16px;
    object-fit: contain;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.loading-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 32px;
}

.loading-bar-container {
    width: 280px;
    height: 4px;
    background: var(--border-light);
    border-radius: 2px;
    overflow: hidden;
    margin: 0 auto 16px;
}

.loading-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--nasa-blue) 0%, var(--nasa-blue-light) 100%);
    border-radius: 2px;
    transition: width var(--transition-normal);
}

.loading-status {
    font-size: 13px;
    color: var(--text-tertiary);
    font-family: var(--font-mono);
}

/* =====================================================
   MAIN APP LAYOUT
   ===================================================== */

.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    opacity: 1;
    transition: opacity var(--transition-normal);
}

.app.hidden {
    opacity: 0;
    pointer-events: none;
}

/* =====================================================
   HEADER
   ===================================================== */

.header {
    height: var(--header-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    box-shadow: var(--shadow-sm);
    z-index: 100;
}

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

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

.logo-icon {
    width: 36px;
    height: 36px;
}

.logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--nasa-blue);
    letter-spacing: 4px;
}

.header-logo-img {
    height: 28px;
    width: auto;
    object-fit: contain;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.header-divider {
    width: 1px;
    height: 32px;
    background: var(--border-medium);
}

.header-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

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

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

.badge-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
}

.badge-phase {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-inverse);
    background: var(--nasa-blue);
    padding: 2px 8px;
    border-radius: 4px;
}

.digital-twin-badge {
    background: linear-gradient(135deg, var(--nasa-blue) 0%, var(--nasa-blue-light) 100%);
    border-color: var(--nasa-blue);
}

.digital-twin-badge .badge-label {
    color: var(--text-inverse);
}

.badge-icon {
    font-size: 14px;
}

/* =====================================================
   MAIN CONTENT AREA
   ===================================================== */

.main-content {
    flex: 1;
    display: flex;
    overflow: hidden;
    background: var(--bg-primary);
}

/* =====================================================
   PANELS (Left & Right)
   ===================================================== */

.panel {
    width: var(--panel-width);
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.panel-left {
    border-left: none;
    border-top: none;
    border-bottom: none;
}

.panel-right {
    border-right: none;
    border-top: none;
    border-bottom: none;
}

.panel-header {
    padding: 16px 20px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-light);
}

.panel-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.panel-icon {
    color: var(--nasa-blue);
}

.panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

/* Custom Scrollbar */
.panel-content::-webkit-scrollbar {
    width: 6px;
}

.panel-content::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

.panel-content::-webkit-scrollbar-thumb {
    background: var(--border-dark);
    border-radius: 3px;
}

.panel-content::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* =====================================================
   SYSTEM COMPONENTS (Left Panel)
   ===================================================== */

.component-group {
    margin-bottom: 12px;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-secondary);
    transition: box-shadow var(--transition-fast);
}

.component-group:hover {
    box-shadow: var(--shadow-md);
}

.component-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: var(--bg-tertiary);
    cursor: pointer;
    transition: background var(--transition-fast);
    user-select: none;
}

.component-header:hover {
    background: var(--bg-hover);
}

.component-header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.component-number {
    width: 24px;
    height: 24px;
    background: var(--nasa-blue);
    color: var(--text-inverse);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
}

.component-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.component-toggle {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    transition: transform var(--transition-fast);
}

.component-group.expanded .component-toggle {
    transform: rotate(180deg);
}

.component-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.component-group.expanded .component-body {
    max-height: 1000px;
}

.component-content {
    padding: 16px;
    border-top: 1px solid var(--border-light);
}

.subcomponent {
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-light);
}

.subcomponent:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.subcomponent-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--nasa-blue);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.subcomponent-title::before {
    content: "▸";
    font-size: 10px;
}

.subcomponent-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* =====================================================
   3D VIEWER (Center)
   ===================================================== */

.viewer-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background: linear-gradient(180deg, var(--bg-tertiary) 0%, var(--bg-primary) 100%);
}

.viewer {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.viewer canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

.viewer-controls {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 24px;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
}

.control-hint {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-secondary);
}

.hint-icon {
    font-size: 16px;
    color: var(--nasa-blue);
}

.model-toggle {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 4px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
}

.toggle-btn {
    padding: 8px 20px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.toggle-btn:hover:not(:disabled) {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.toggle-btn.active {
    background: var(--nasa-blue);
    color: var(--text-inverse);
}

.toggle-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* =====================================================
   SIMULATION PANEL (Right)
   ===================================================== */

.sim-section {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-light);
}

.sim-section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.sim-section-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

/* Input Groups */
.input-group {
    margin-bottom: 12px;
}

.input-group label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.input-with-unit {
    display: flex;
    align-items: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: 6px;
    overflow: hidden;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input-with-unit:focus-within {
    border-color: var(--nasa-blue);
    box-shadow: 0 0 0 3px rgba(11, 61, 145, 0.1);
}

.input-with-unit input {
    flex: 1;
    padding: 10px 12px;
    font-size: 14px;
    font-family: var(--font-mono);
    font-weight: 500;
    color: var(--text-primary);
    background: transparent;
    border: none;
    outline: none;
}

.input-with-unit .unit {
    padding: 10px 12px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-tertiary);
    background: var(--bg-hover);
    border-left: 1px solid var(--border-light);
}

/* Run Button */
.sim-run-btn {
    width: 100%;
    padding: 14px 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-inverse);
    background: linear-gradient(135deg, var(--nasa-blue) 0%, var(--nasa-blue-light) 100%);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
}

.sim-run-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

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

.sim-run-btn.running {
    background: var(--status-warning);
}

.sim-run-btn.running .btn-icon {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.btn-icon {
    font-size: 12px;
}

/* Status Grid */
.status-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.status-item {
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-light);
}

.status-label {
    display: block;
    font-size: 10px;
    font-weight: 500;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.status-value {
    display: block;
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--text-primary);
}

.status-value.temp-value {
    color: var(--status-warning);
}

/* Progress Bar */
.sim-progress-container {
    margin-bottom: 20px;
    padding: 16px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-light);
    display: none;
}

.sim-progress-container.visible {
    display: block;
    animation: fadeIn var(--transition-normal);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.progress-header {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.progress-bar-bg {
    height: 8px;
    background: var(--border-light);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--nasa-blue) 0%, var(--status-success) 100%);
    border-radius: 4px;
    transition: width var(--transition-fast);
}

/* Results Section */
.results-section {
    display: none;
}

.results-section.visible {
    display: block;
    animation: fadeInUp var(--transition-normal);
}

.results-category {
    margin-bottom: 16px;
    padding: 14px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-light);
}

.results-category:last-child {
    margin-bottom: 0;
}

.results-category-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--nasa-blue);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-light);
}

.result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
}

.result-row:not(:last-child) {
    border-bottom: 1px dashed var(--border-light);
}

.result-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.result-value {
    font-size: 13px;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--text-primary);
}

.result-value.highlight-green {
    color: var(--status-success);
}

.result-value.highlight-blue {
    color: var(--nasa-blue);
}

/* =====================================================
   STATUS BAR
   ===================================================== */

.status-bar {
    height: var(--status-bar-height);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    font-size: 12px;
    color: var(--text-secondary);
}

.status-bar-left,
.status-bar-center,
.status-bar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--status-success);
    animation: blink 2s ease-in-out infinite;
}

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

.status-indicator.processing {
    background: var(--status-warning);
    animation: pulse-indicator 1s ease-in-out infinite;
}

@keyframes pulse-indicator {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

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

/* =====================================================
   RESPONSIVE ADJUSTMENTS
   ===================================================== */

@media (max-width: 1400px) {
    :root {
        --panel-width: 300px;
    }
}

@media (max-width: 1200px) {
    :root {
        --panel-width: 280px;
    }
    
    .header-badge {
        display: none;
    }
}

/* =====================================================
   UTILITY CLASSES
   ===================================================== */

.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn var(--transition-normal);
}

.slide-in-left {
    animation: slideInLeft var(--transition-normal);
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-right {
    animation: slideInRight var(--transition-normal);
}

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