/* ============================================
   Jaw Crusher Energy & Carbon Calculator
   Minimalist German Industrial Design
   Dark Green | Light Gray | White Duotone
   ============================================ */

@import url('https://fonts.cdnfonts.com/css/u001');

:root {
    /* Duotone Color Palette - German Industrial Minimalism */
    --color-primary: #1a3a2e;
    --color-primary-mid: #2d5a45;
    --color-primary-light: #4a7c5e;
    
    --color-bg: #f8f8f8;
    --color-surface: #ffffff;
    --color-surface-dark: #1a3a2e;
    
    --color-text: #1a1a1a;
    --color-text-secondary: #595959;
    --color-text-light: #ffffff;
    
    --color-border: #e0e0e0;
    --color-border-light: #f0f0f0;
    
    --color-accent-green: #4a7c5e;
    --color-accent-carbon: #3a3a3a;
    
    /* Typography - U001 Industrial Font */
    --font-primary: 'U001', 'Perun', -apple-system, BlinkMacSystemFont, 'SF Pro', system-ui, sans-serif;
    --font-mono: 'SF Mono', 'Consolas', monospace;
    
    /* Spacing - Precise Grid System */
    --spacing-unit: 8px;
    --spacing-xs: calc(var(--spacing-unit) * 1);
    --spacing-sm: calc(var(--spacing-unit) * 2);
    --spacing-md: calc(var(--spacing-unit) * 3);
    --spacing-lg: calc(var(--spacing-unit) * 4);
    --spacing-xl: calc(var(--spacing-unit) * 6);
    
    /* Border Radius - Minimal */
    --radius: 2px;
    
    /* Shadows - Subtle */
    --shadow: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 2px 4px rgba(0,0,0,0.06);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    min-height: 100vh;
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header - Dark Green Background */
.header {
    background-color: var(--color-surface-dark);
    color: var(--color-text-light);
    padding: var(--spacing-lg);
    text-align: center;
    border-bottom: 1px solid var(--color-primary);
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 400;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

/* Tab Navigation */
.tab-nav {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: center;
    gap: 0;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    font-family: var(--font-primary);
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.02em;
    padding: var(--spacing-md) var(--spacing-xl);
    text-transform: uppercase;
    transition: all 0.2s ease;
    border-bottom: 2px solid transparent;
}

.tab-btn:hover {
    color: var(--color-text);
    background-color: var(--color-border-light);
}

.tab-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    font-weight: 500;
}

/* Main Content */
.main-content {
    flex: 1;
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
    padding: var(--spacing-xl);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

#plan-tab.active {
    display: block;
}

@media (max-width: 900px) {
    .tab-content.active {
        grid-template-columns: 1fr;
    }
}

/* Panels */
.panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--spacing-lg);
}

.panel h2 {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 400;
}

/* Sections */
.section {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border-light);
}

.section:last-of-type {
    border-bottom: none;
}

.section h3 {
    font-size: 0.75rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

/* Input Groups */
.input-group {
    margin-bottom: var(--spacing-md);
}

.input-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.input-group .unit {
    font-weight: 400;
    color: var(--color-text-secondary);
    text-transform: lowercase;
}

.input-group input,
.input-group select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-family: var(--font-primary);
    background-color: var(--color-surface);
    color: var(--color-text);
    transition: border-color 0.15s ease;
}

.input-group input + input {
    margin-top: var(--spacing-sm);
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.input-group input::placeholder {
    color: var(--color-text-secondary);
    opacity: 0.5;
}

/* BWI Suggestions Dropdown */
.bwi-suggestions {
    position: relative;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    margin-top: var(--spacing-xs);
    max-height: 200px;
    overflow-y: auto;
    z-index: 100;
}

.bwi-suggestion-item {
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    font-size: 0.8125rem;
    border-bottom: 1px solid var(--color-border-light);
    transition: background-color 0.1s ease;
}

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

.bwi-suggestion-item:hover {
    background-color: var(--color-border-light);
}

.bwi-suggestion-item .material-name {
    font-weight: 500;
    color: var(--color-text);
    display: block;
}

.bwi-suggestion-item .material-info {
    font-size: 0.6875rem;
    color: var(--color-text-secondary);
    margin-top: 2px;
}

/* Reduction Ratio Display */
.reduction-ratio {
    background-color: var(--color-border-light);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.75rem;
    text-align: center;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.reduction-ratio span {
    font-weight: 500;
    color: var(--color-text);
}

/* Calculate Button */
.calculate-btn {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-primary);
    color: var(--color-text-light);
    border: none;
    font-family: var(--font-primary);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.calculate-btn:hover {
    background-color: var(--color-primary-mid);
}

.calculate-btn:active {
    background-color: var(--color-primary-light);
}

.calculate-btn.loading {
    opacity: 0.7;
    cursor: wait;
}

/* Results Section */
.placeholder {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.hidden {
    display: none !important;
}

/* Result Sections */
.result-section {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border-light);
}

.result-section:last-of-type {
    border-bottom: none;
}

.result-section h3 {
    font-size: 0.75rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

/* Result Grid */
.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-sm);
}

/* Result Cards */
.result-card {
    background: var(--color-border-light);
    padding: var(--spacing-md);
    text-align: center;
    border: 1px solid var(--color-border);
}

.result-card.primary {
    background-color: var(--color-surface-dark);
    border-color: var(--color-primary);
}

.result-card.primary .result-label,
.result-card.primary .result-value,
.result-card.primary .result-unit {
    color: var(--color-text-light);
}

.result-card.secondary {
    background-color: var(--color-border-light);
    border-color: var(--color-border);
}

.result-card.highlight {
    border-color: var(--color-accent-green);
    background-color: rgba(74, 124, 94, 0.05);
}

.result-card.carbon {
    background-color: var(--color-accent-carbon);
    border-color: var(--color-accent-carbon);
}

.result-card.carbon .result-label,
.result-card.carbon .result-value,
.result-card.carbon .result-unit {
    color: var(--color-text-light);
}

.result-label {
    display: block;
    font-size: 0.625rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.result-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 300;
    color: var(--color-text);
    line-height: 1.2;
    font-family: var(--font-mono);
}

.result-unit {
    display: block;
    font-size: 0.625rem;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Emission Info */
.emission-info {
    margin-top: var(--spacing-md);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    text-align: center;
}

/* Error Message */
.error-message {
    background-color: var(--color-surface);
    border: 1px solid var(--color-text-secondary);
    padding: var(--spacing-md);
    color: var(--color-text);
    margin-top: var(--spacing-md);
    font-size: 0.875rem;
}

/* Loading State */
.calculate-btn.loading::after {
    content: "...";
    animation: dots 1.5s infinite;
}

@keyframes dots {
    0%, 20% { content: "."; }
    40% { content: ".."; }
    60%, 100% { content: "..."; }
}

/* Scrollbar Styling - Minimal */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-border-light);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
}

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

/* Crushing Plan Styles */
.crushing-plan-container {
    max-width: 100%;
    margin: 0 auto;
}

.mode-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.mode-card {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    padding: var(--spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.mode-card:hover {
    border-color: var(--color-primary);
    background-color: var(--color-border-light);
}

.mode-card.selected {
    border-color: var(--color-primary);
    background-color: var(--color-surface-dark);
    color: var(--color-text-light);
}

.mode-card.selected h3,
.mode-card.selected p {
    color: var(--color-text-light);
}

.mode-card h3 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.mode-card p {
    font-size: 0.75rem;
    opacity: 0.7;
}

.material-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.material-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: all 0.15s ease;
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 120px;
}

.material-card:hover {
    border-color: var(--color-primary);
    background-color: var(--color-border-light);
}

.material-card.selected {
    border-color: var(--color-primary);
    border-width: 2px;
    background-color: rgba(26, 58, 46, 0.05);
}

.material-card-name {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    color: var(--color-text);
}

.material-card-value {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    font-family: var(--font-primary);
    margin-bottom: var(--spacing-sm);
    flex-grow: 1;
}

.material-card-use {
    display: none;
}

.material-add-btn {
    width: 100%;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-primary);
    color: var(--color-text-light);
    border: none;
    font-family: var(--font-primary);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    cursor: pointer;
    transition: background-color 0.15s ease;
    margin-top: auto;
}

.material-add-btn:hover {
    background-color: var(--color-primary-mid);
}

.selected-materials {
    margin: var(--spacing-lg) 0;
}

.selected-material-item {
    background: #f0f0f0;
    border: 1px solid var(--color-border);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.selected-material-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.selected-material-name {
    font-size: 0.8125rem;
    font-weight: 500;
    text-transform: uppercase;
}

.remove-material-btn {
    background: transparent;
    border: 1px solid var(--color-border);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.6875rem;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.remove-material-btn:hover {
    background-color: var(--color-text);
    color: var(--color-text-light);
    border-color: var(--color-text);
}

.percentage-control {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.percentage-slider {
    flex: 1;
    -webkit-appearance: none;
    height: 4px;
    background: var(--color-border);
    outline: none;
}

.percentage-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--color-primary);
    cursor: pointer;
}

.percentage-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--color-primary);
    cursor: pointer;
    border: none;
}

.percentage-input {
    width: 60px;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-border);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    text-align: center;
}

.size-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.size-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--spacing-md);
    text-align: center;
    cursor: pointer;
    transition: all 0.15s ease;
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-family: var(--font-primary);
    font-weight: 500;
    gap: 2px;
}

.size-card .size-value {
    font-size: 1rem;
    font-weight: 500;
}

.size-card .size-unit {
    font-size: 0.625rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
}

.size-card:hover {
    border-color: var(--color-primary);
    background-color: var(--color-border-light);
}

.size-card.selected {
    background-color: var(--color-surface-dark);
    color: var(--color-text-light);
    border-color: var(--color-primary);
}

.size-card.selected .size-unit {
    color: var(--color-text-light);
}

.quantity-presets {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.quantity-preset-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.15s ease;
}

.quantity-preset-btn:hover {
    background-color: var(--color-border-light);
    border-color: var(--color-primary);
}

.power-source-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.power-source-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: all 0.15s ease;
}

.power-source-card:hover {
    border-color: var(--color-primary);
    background-color: var(--color-border-light);
}

.power-source-card.selected {
    border-color: var(--color-primary);
    border-width: 2px;
    background-color: rgba(26, 58, 46, 0.05);
}

.power-source-card h4 {
    font-size: 0.8125rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
}

.power-source-card p {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

.machine-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.machine-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--spacing-md);
    text-align: center;
    cursor: pointer;
    transition: all 0.15s ease;
}

.machine-card:hover {
    border-color: var(--color-primary);
    background-color: var(--color-border-light);
}

.machine-card.selected {
    border-color: var(--color-primary);
    border-width: 2px;
    background-color: rgba(26, 58, 46, 0.05);
}

.machine-card-power {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.machine-card-label {
    font-size: 0.625rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
}

.idle-percentage-grid {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.idle-percentage-btn {
    flex: 1;
    padding: var(--spacing-sm);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: all 0.15s ease;
    font-size: 0.875rem;
}

.idle-percentage-btn:hover {
    background-color: var(--color-border-light);
}

.idle-percentage-btn.selected {
    background-color: var(--color-surface-dark);
    color: var(--color-text-light);
    border-color: var(--color-primary);
}

.plan-section {
    margin-bottom: var(--spacing-xl);
}

.plan-section h3 {
    font-size: 0.75rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

.editable-name {
    background: transparent;
    border: none;
    border-bottom: 1px dashed var(--color-border);
    font-size: 0.8125rem;
    font-weight: 500;
    padding: 2px 4px;
    font-family: var(--font-primary);
}

.editable-name:focus {
    outline: none;
    border-bottom-color: var(--color-primary);
}

/* Print Styles */
@media print {
    .header, .tab-nav, .input-panel, .calculate-btn {
        display: none;
    }
    
    .tab-content.active {
        grid-template-columns: 1fr;
    }
}