/* ============================================
   GLOBAL STYLES & RESET
   ============================================ */

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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --light-bg: #f9fafb;
    --white: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html, body {
    height: 100%;
    width: 100%;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--light-bg);
    color: var(--text-primary);
}

body {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

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

.header {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.95) 0%, rgba(30, 64, 175, 0.95) 100%);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--white);
    padding: 1.5rem 2rem;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 100;
}

.header-content {
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.title-section h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.title-section p {
    font-size: 0.875rem;
    opacity: 0.9;
}

.header-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.file-upload-label {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: var(--white);
    padding: 0.625rem 1.25rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.file-upload-label:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.file-upload-input {
    display: none;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: var(--white);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.btn.active {
    background: var(--accent-color) !important;
    border-color: var(--accent-color) !important;
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.375rem;
    color: var(--text-primary);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    background: var(--light-bg);
}

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

.main-container {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.sidebar {
    width: 320px;
    min-width: 250px;
    max-width: 600px;
    flex-shrink: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
}

.map-container {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.sidebar-resizer {
    width: 6px;
    background: var(--border-color);
    cursor: col-resize;
    transition: background 0.2s;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-resizer:hover, .sidebar-resizer.is-resizing {
    background: var(--primary-color);
}

.sidebar-resizer::after {
    content: '';
    display: block;
    width: 2px;
    height: 30px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 2px;
}

.map {
    width: 100%;
    height: 100%;
}

.map-hint {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--white);
    padding: 2rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-lg);
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.125rem;
    z-index: 100;
    pointer-events: none;
    animation: fadeInScale 0.3s ease-out;
}

.map-hint i {
    display: block;
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
    animation: bounce 2s infinite;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* ============================================
   SIDEBAR SECTIONS
   ============================================ */

section {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

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

section h2 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

section h3 {
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ============================================
   METRICS SECTION
   ============================================ */

.metrics-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.metric-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 1rem;
    border-radius: 0.625rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.metric-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.metric-card-highlight {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
}

.metric-label {
    font-size: 0.75rem;
    font-weight: 600;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    font-family: 'Monaco', 'Courier New', monospace;
}

.metric-card-highlight .metric-value {
    font-size: 1.75rem;
}

.metric-unit {
    font-size: 0.75rem;
    opacity: 0.8;
}

/* ============================================
   CONTROLS SECTION
   ============================================ */

.control-group {
    margin-bottom: 1rem;
}

.control-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    margin-bottom: 0.5rem;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.slider::-webkit-slider-thumb:hover {
    background: var(--secondary-color);
    box-shadow: var(--shadow-md);
}

.slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.slider::-moz-range-thumb:hover {
    background: var(--secondary-color);
    box-shadow: var(--shadow-md);
}

#opacityValue, #markerSizeValue {
    float: right;
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: 500;
    user-select: none;
    transition: var(--transition);
}

.checkbox-label input {
    width: 18px;
    height: 18px;
    margin-right: 0.75rem;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.checkbox-label:hover {
    color: var(--primary-color);
}

/* ============================================
   SELECTION MODE STYLES
   ============================================ */

.selection-controls-section {
    background: linear-gradient(to bottom, #f0f9ff, #ffffff);
}

.button-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

#selectionInfo {
    animation: slideDown 0.3s ease-out;
}

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

/* Selection mode button specific styles */
.selection-controls-section .btn-primary {
    background: var(--primary-color);
    color: var(--white);
    border: 2px solid transparent;
}

.selection-controls-section .btn-primary.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}

.selection-controls-section .btn-secondary {
    background: var(--light-bg);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.selection-controls-section .btn-secondary:hover {
    background: var(--border-color);
    border-color: var(--text-secondary);
}

/* ============================================
   INFO SECTION
   ============================================ */

.info-section ul {
    list-style: none;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.info-section li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.info-section li:before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background: var(--light-bg);
    border-top: 1px solid var(--border-color);
    padding: 1rem;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ============================================
   MODALS
   ============================================ */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease-out;
}

.modal.hidden {
    display: none;
}

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

.modal-content {
    background: var(--white);
    border-radius: 0.75rem;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    max-width: 400px;
    width: 90%;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.modal-header h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-error {
    border-left: 4px solid var(--danger-color);
}

.modal-error .modal-header h3 {
    color: var(--danger-color);
}

.modal-success {
    border-left: 4px solid var(--success-color);
}

.modal-success .modal-header h3 {
    color: var(--success-color);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

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

/* ============================================
   LEAFLET OVERRIDES
   ============================================ */

.leaflet-container {
    background: #f0f4f8;
}

.leaflet-popup-content {
    font-size: 0.875rem;
    margin: 0;
}

.leaflet-popup-content-wrapper {
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
}

.leaflet-control {
    box-shadow: var(--shadow-md) !important;
    border: none !important;
}

.leaflet-control-zoom-in, 
.leaflet-control-zoom-out {
    background: var(--white) !important;
    color: var(--text-primary) !important;
    font-weight: 700;
}

.leaflet-control-zoom-in:hover, 
.leaflet-control-zoom-out:hover {
    background: var(--light-bg) !important;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1200px) {
    .sidebar {
        width: 280px;
    }
    
    .metrics-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .main-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: 35vh;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        order: 2;
    }
    
    .map-container {
        height: 65vh;
        order: 1;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .header-controls {
        width: 100%;
        justify-content: space-between;
        flex-wrap: wrap;
    }
    
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .title-section {
        width: 100%;
    }
    
    .title-section h1 {
        font-size: 1.25rem;
    }
    
    section {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .header-content {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .title-section h1 {
        font-size: 1.125rem;
    }
    
    .title-section p {
        font-size: 0.75rem;
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
    }
    
    .metric-value {
        font-size: 1.25rem;
    }
}

/* Unit Toggle Button */
.btn-unit-toggle {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
    font-weight: 600;
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.btn-unit-toggle:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-unit-toggle i {
    font-size: 0.875rem;
}

/* ============================================
   WAREHOUSE COSTS SECTION
   ============================================ */

.warehouse-controls-section {
    background: linear-gradient(to bottom, #f0fdf4, #ffffff);
}

/* ============================================
   SIDE PANEL
   ============================================ */

.side-panel {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    z-index: 2000;
    pointer-events: none;
    transition: var(--transition);
}

.side-panel.active {
    pointer-events: all;
}

.side-panel-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.side-panel.active .side-panel-backdrop {
    opacity: 1;
    pointer-events: all;
}

.side-panel-content {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 400px;
    max-width: 90vw;
    background: var(--white);
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.side-panel.active .side-panel-content {
    transform: translateX(0);
}

.side-panel-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
}

.side-panel-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.side-panel-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--white);
    cursor: pointer;
    line-height: 1;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.375rem;
    transition: var(--transition);
}

.side-panel-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.side-panel-body {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.side-panel-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    background: var(--light-bg);
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.info-display {
    background: var(--light-bg);
    padding: 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.9375rem;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.input-group {
    display: flex;
    align-items: center;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    overflow: hidden;
    transition: var(--transition);
}

.input-group:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.input-prefix,
.input-suffix {
    background: var(--light-bg);
    padding: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.form-input {
    flex: 1;
    border: none;
    padding: 0.75rem;
    font-size: 0.9375rem;
    outline: none;
    font-family: 'Monaco', 'Courier New', monospace;
}

.form-input::-webkit-inner-spin-button,
.form-input::-webkit-outer-spin-button {
    opacity: 1;
}

.cost-breakdown {
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1rem;
}

.cost-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.cost-item + .cost-item {
    border-top: 1px solid var(--border-color);
}

.cost-total {
    color: var(--text-primary);
    font-size: 1.125rem;
    padding-top: 0.75rem;
    margin-top: 0.25rem;
}

/* Unit Toggle Button */
.btn-unit-toggle {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
    font-weight: 600;
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.btn-unit-toggle:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* New Metric Card Colors */
.metric-card-transport {
    background: linear-gradient(135deg, #0891b2 0%, #0e7490 100%);
}

.metric-card-warehouse {
    background: linear-gradient(135deg, #7c3aed 0%, #6d28d9 100%);
}

/* Responsive */
@media (max-width: 768px) {
    .side-panel-content {
        width: 100%;
        max-width: 100%;
    }
}