/* Design System Variables */
:root {
  /* Brand Colors */
  --im-purple: #5C068C;
  --im-magenta: #BB29BB;
  --im-yellow: #FFC72C;
  --im-teal: #00BFB2;
  --im-green: #97D700;
  --im-black: #101820;
  --im-white: #FFFFFF;
  --im-warm-grey: #75787B;
  --im-dark-grey: #2c2d2e;
  --im-cool-grey: #f4f4f4;
  --im-primary-color: #5C068C;
  
  /* Glass Mode Theme */
  --ui-colour-hue: 177;
  --main-text: #fcfcfc;
  --main-background: hsl(var(--ui-colour-hue), 35%, 6%);
  --site-header: hsl(var(--ui-colour-hue), 25%, 12%);
  --text-colour: var(--im-white);
  --ui-color-main: var(--im-white);
  --ui-color-contrast: var(--im-black);
  --site-header-text: var(--ui-color-main);
  --ui-panel-colour: hsl(var(--ui-colour-hue) 5% 40% / 50%);
  --ui-panel-border: hsl(var(--ui-colour-hue) 10% 70%/ 50%);
  --ui-menu-bg: hsl(var(--ui-colour-hue) 3% 20% / 50%);
  --ui-menu-hover: hsl(var(--ui-colour-hue), 15%, 30%);
  --ui-menu-colour: var(--main-text);
  --ui-modal-header: hsl(var(--ui-colour-hue) 50% 50%/5%);
  --ui-modal-border: var(--ui-panel-border);
  --ui-modal-bg: hsl(var(--ui-colour-hue) 5% 20% / 50%);
  --ui-modal-bg-blur: none;
  --ui-item-bg: hsl(var(--ui-colour-hue) 80% 50% / 40%);
  --ui-glass-blur: 7px;
  --ui-accent-color: hsl(78 68% 86% / 35%);
  --im-cta-color: var(--im-magenta);
  --input-bg: #ffffff22;
  --ui-button-bg: var(--im-green);
  --table-row-color: hsl(var(--ui-colour-hue) 5% 50% / 50%);
  --range-track-color: var(--ui-modal-header);
  --range-thumb-color: var(--ui-menu-colour);
  --box-shadow: 5px 5px 15px 1px #00000099;
}

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

body { 
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 
    background: var(--main-background);
    color: var(--main-text);
    display: flex; 
    height: 100vh; 
    overflow: hidden; 
}

/* Sidebar */
.sidebar { 
    width: 220px; 
    background: var(--site-header);
    backdrop-filter: blur(var(--ui-glass-blur));
    border-right: 2px solid var(--ui-panel-border);
    display: flex; 
    flex-direction: column; 
    padding: 20px; 
}

.sidebar h2 { 
    font-size: 1.2em; 
    margin-bottom: 20px; 
    color: var(--im-teal);
}

.nav-item { 
    padding: 12px 15px; 
    margin-bottom: 8px; 
    background: var(--ui-menu-bg);
    backdrop-filter: blur(var(--ui-glass-blur));
    border: 1px solid var(--ui-panel-border);
    border-radius: 8px; 
    cursor: pointer; 
    transition: all 0.2s; 
    font-size: 0.9em; 
    color: var(--ui-menu-colour);
}

.nav-item:hover { 
    background: var(--ui-menu-hover);
    border-color: var(--im-teal);
}

.nav-item.active { 
    background: var(--im-teal);
    color: var(--im-black);
    border-color: var(--im-teal);
    font-weight: 600; 
}

/* Main Content */
.main-content { 
    flex: 1; 
    overflow-y: auto; 
    padding: 20px; 
}

.tab-content { 
    display: none; 
}

.tab-content.active { 
    display: block; 
}

/* Headers */
h1 { 
    text-align: center; 
    margin-bottom: 30px; 
    font-size: 2.5em; 
}

/* Logo Styling */
.page-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 20px 0;
}

.im-logo {
    height: 100px;
    width: auto;
    max-width: 100%;
    filter: drop-shadow(0 2px 8px rgba(0, 191, 178, 0.3));
}

.sidebar-logo {
    margin-bottom: 30px;
    padding: 20px 0;
    text-align: center;
    border-bottom: 1px solid var(--ui-panel-border);
}

.im-symbol {
    height: 100px;
    filter: drop-shadow(0 2px 4px rgba(0, 191, 178, 0.2));
}

/* Container & Panels */
.container { 
    max-width: 1400px; 
    margin: 0 auto; 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 30px; 
    align-items: start; 
}

.panel { 
    background: var(--ui-panel-colour);
    backdrop-filter: blur(var(--ui-glass-blur));
    border-radius: 12px; 
    padding: 30px; 
    border: 1px solid var(--ui-panel-border);
    box-shadow: var(--box-shadow);
}

.panel:nth-child(n+2):last-child { 
    position: sticky; 
    top: 20px; 
    height: fit-content; 
}

/* Sections */
.section { 
    margin-bottom: 25px; 
}

.section h3 { 
    font-size: 0.95em; 
    text-transform: uppercase; 
    letter-spacing: 1px; 
    color: var(--im-teal);
    margin-bottom: 12px; 
    opacity: 0.8; 
    cursor: pointer; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    user-select: none; 
}

.section h3:hover { 
    opacity: 1; 
}

.section h3::after { 
    content: '▼'; 
    font-size: 0.7em; 
    transition: transform 0.3s; 
}

.section.collapsed h3::after { 
    transform: rotate(-90deg); 
}

.section.collapsed .section-content { 
    display: none; 
}

.section-content { 
    transition: all 0.3s; 
}

/* Form Elements */
.form-group { 
    margin-bottom: 15px; 
}

label { 
    display: block; 
    font-size: 0.9em; 
    margin-bottom: 6px; 
    color: var(--ui-menu-colour);
}

input[type="text"], 
input[type="number"], 
input[type="color"], 
select { 
    width: 100%; 
    padding: 10px 12px; 
    background: var(--input-bg);
    backdrop-filter: blur(var(--ui-glass-blur));
    border: 1px solid var(--ui-panel-border);
    border-radius: 6px; 
    color: var(--main-text);
    font-size: 0.95em; 
    transition: border-color 0.2s; 
}

input[type="text"]:focus, 
input[type="number"]:focus, 
input[type="color"]:focus, 
select:focus { 
    outline: none; 
    border-color: var(--im-teal);
    box-shadow: 0 0 0 2px var(--ui-accent-color);
}

.input-row { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 12px; 
}

.input-row-3 { 
    display: grid; 
    grid-template-columns: 1fr 1fr 1fr; 
    gap: 12px; 
}

/* Preview */
.preview-box { 
    background: var(--ui-modal-bg);
    backdrop-filter: blur(var(--ui-glass-blur));
    border: 2px solid var(--ui-panel-border);
    border-radius: 8px; 
    padding: 20px; 
    text-align: center; 
    min-height: 400px; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    overflow: auto; 
}

.preview-box img { 
    max-width: 100%; 
    max-height: 100%; 
    border-radius: 6px; 
}

/* Buttons */
button { 
    width: 100%; 
    padding: 12px; 
    background: var(--ui-button-bg);
    border: none; 
    border-radius: 6px; 
    color: var(--im-black);
    font-weight: 600; 
    cursor: pointer; 
    font-size: 0.95em; 
    transition: all 0.2s; 
    box-shadow: var(--box-shadow);
}

button:hover { 
    background: var(--im-green);
    transform: translateY(-2px); 
    filter: brightness(1.1);
}

button:active { 
    transform: translateY(0); 
}

.mode-selector { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 10px; 
    margin-bottom: 15px; 
}

.mode-btn { 
    padding: 10px; 
    background: var(--ui-menu-bg);
    backdrop-filter: blur(var(--ui-glass-blur));
    border: 2px solid var(--ui-panel-border);
    border-radius: 6px; 
    color: var(--ui-menu-colour);
    cursor: pointer; 
    font-size: 0.9em; 
    transition: all 0.2s; 
}

.mode-btn.active { 
    background: var(--im-teal);
    border-color: var(--im-teal);
    color: var(--im-black);
}

.divider { 
    height: 1px; 
    background: var(--ui-panel-border);
    margin: 20px 0; 
}

.error { 
    color: #ff6b6b; 
    font-size: 0.9em; 
    margin-top: 5px; 
}

/* CSV Preview */
.csv-preview { 
    background: var(--ui-modal-bg);
    backdrop-filter: blur(var(--ui-glass-blur));
    border: 1px solid var(--ui-panel-border);
    border-radius: 6px; 
    margin-top: 10px; 
    overflow-x: auto; 
    max-height: 150px; 
    overflow-y: auto; 
}

.csv-preview table { 
    width: 100%; 
    font-size: 0.85em; 
    border-collapse: collapse; 
}

.csv-preview th { 
    background: var(--table-row-color);
    padding: 8px; 
    text-align: left; 
    color: var(--im-teal);
    font-weight: 600; 
}

.csv-preview td { 
    padding: 8px; 
    border-bottom: 1px solid var(--ui-panel-border);
    color: var(--ui-menu-colour);
}

/* Button Groups */
.button-group { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 12px; 
}

.btn-secondary { 
    background: var(--ui-menu-bg);
    backdrop-filter: blur(var(--ui-glass-blur));
    color: var(--ui-menu-colour);
    border: 1px solid var(--ui-panel-border);
}

.btn-secondary:hover { 
    background: var(--ui-menu-hover);
    border-color: var(--im-teal);
}

.btn-small { 
    padding: 8px 12px; 
    font-size: 0.85em; 
}

/* File Input */
.file-input-label { 
    display: block; 
    padding: 20px; 
    background: var(--ui-modal-bg);
    backdrop-filter: blur(var(--ui-glass-blur));
    border: 2px dashed var(--ui-panel-border);
    border-radius: 6px; 
    text-align: center; 
    cursor: pointer; 
    transition: all 0.2s; 
    color: var(--ui-menu-colour);
    font-size: 0.9em; 
}

.file-input-label:hover { 
    border-color: var(--im-teal);
    background: var(--ui-accent-color);
}

.file-input-label.has-cached { 
    border-color: var(--im-green);
    background: hsl(78 68% 86% / 15%);
}

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

.file-confirmation { 
    color: var(--im-green);
    font-size: 0.9em; 
    margin-top: 5px; 
}

.file-confirmation.cached { 
    color: var(--im-yellow);
}

/* Settings Import Section */
.settings-import-section { 
    background: var(--ui-modal-bg);
    backdrop-filter: blur(var(--ui-glass-blur));
    border: 2px solid var(--im-green);
    border-radius: 8px; 
    padding: 15px; 
    margin-bottom: 20px; 
    box-shadow: var(--box-shadow);
}

.settings-import-section h3 { 
    color: var(--im-green) !important;
    cursor: default !important; 
}

.settings-import-section h3::after { 
    display: none; 
}

/* Cache Info */
.cache-info { 
    background: var(--ui-modal-bg);
    backdrop-filter: blur(var(--ui-glass-blur));
    border: 1px solid var(--ui-panel-border);
    border-radius: 6px; 
    padding: 10px; 
    margin-top: 10px; 
    font-size: 0.85em; 
}

.cache-item { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    padding: 5px 0; 
    border-bottom: 1px solid var(--ui-panel-border);
}

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

.cache-badge { 
    display: inline-block; 
    padding: 2px 8px; 
    border-radius: 4px; 
    font-size: 0.8em; 
    font-weight: 600; 
    background: var(--im-green);
    color: var(--im-black);
}

/* Import Status */
.import-status { 
    padding: 10px; 
    border-radius: 6px; 
    margin-top: 10px; 
    font-size: 0.9em; 
    backdrop-filter: blur(var(--ui-glass-blur));
}

.import-status.success { 
    background: hsl(78 68% 86% / 20%);
    border: 1px solid var(--im-green);
    color: var(--im-green);
}

.import-status.warning { 
    background: hsl(45 100% 58% / 20%);
    border: 1px solid var(--im-yellow);
    color: var(--im-yellow);
}

/* Checkbox */
.checkbox-group { 
    display: flex; 
    align-items: center; 
    gap: 10px; 
    margin-bottom: 12px; 
}

.checkbox-group input[type="checkbox"] { 
    width: 20px; 
    height: 20px; 
    accent-color: var(--im-teal);
    cursor: pointer; 
}

.checkbox-group label { 
    margin: 0; 
    cursor: pointer; 
    font-weight: 500; 
}

/* Option Box */
.option-box { 
    background: var(--ui-modal-bg);
    backdrop-filter: blur(var(--ui-glass-blur));
    border: 1px solid var(--ui-panel-border);
    border-radius: 8px; 
    padding: 15px; 
    margin-top: 10px; 
}

.option-box.disabled { 
    opacity: 0.5; 
    pointer-events: none; 
}

/* Slider */
.slider-group { 
    display: flex; 
    align-items: center; 
    gap: 10px; 
}

.slider-group input[type="range"] { 
    flex: 1; 
    height: 6px; 
    border-radius: 3px; 
    background: var(--range-track-color);
    appearance: none; 
    cursor: pointer; 
}

.slider-group input[type="range"]::-webkit-slider-thumb { 
    appearance: none; 
    width: 18px; 
    height: 18px; 
    border-radius: 50%; 
    background: var(--range-thumb-color);
    cursor: pointer; 
}

.slider-value { 
    min-width: 45px; 
    text-align: right; 
    color: var(--ui-menu-colour);
    font-size: 0.9em; 
}

/* Color Presets */
.color-presets { 
    display: flex; 
    gap: 6px; 
    margin-top: 8px; 
}

.color-preset { 
    width: 28px; 
    height: 28px; 
    border-radius: 4px; 
    border: 2px solid var(--ui-panel-border);
    cursor: pointer; 
    transition: all 0.2s; 
}

.color-preset:hover { 
    transform: scale(1.15); 
    border-color: var(--im-teal);
}

/* Character Count */
.char-count { 
    font-size: 0.75em; 
    color: #666; 
    text-align: right; 
    margin-top: 4px; 
}

.char-count.warning { 
    color: #ff9800; 
}

.char-count.danger { 
    color: #ff6b6b; 
}

/* Loading Spinner */
@keyframes spin { 
    to { transform: rotate(360deg); } 
}

.loading-spinner { 
    display: inline-block; 
    width: 20px; 
    height: 20px; 
    border: 2px solid var(--ui-panel-border);
    border-top-color: var(--im-teal);
    border-radius: 50%; 
    animation: spin 0.8s linear infinite; 
    margin-right: 10px; 
    vertical-align: middle; 
}

.preview-loading { 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    color: var(--im-teal);
}

/* Animations */
.fade-in { 
    animation: fadeIn 0.3s ease-in; 
}

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

.file-input-label { 
    transition: all 0.3s ease; 
}

.file-input-label.drag-over { 
    border-color: var(--im-teal) !important;
    background: var(--ui-accent-color) !important;
    transform: scale(1.02); 
}

/* Stop-Specific Styles */
.stop-list { 
    max-height: 500px; 
    overflow-y: auto; 
    background: var(--ui-modal-bg);
    backdrop-filter: blur(var(--ui-glass-blur));
    border: 1px solid var(--ui-panel-border);
    border-radius: 8px; 
    padding: 10px; 
}

.stop-item { 
    background: var(--ui-panel-colour);
    backdrop-filter: blur(var(--ui-glass-blur));
    border: 1px solid var(--ui-panel-border);
    border-radius: 8px; 
    padding: 15px; 
    margin-bottom: 10px; 
    display: grid; 
    grid-template-columns: 80px 2fr 120px 100px; 
    gap: 15px; 
    align-items: center; 
    transition: all 0.2s; 
    box-shadow: var(--box-shadow);
}

.stop-item.has-image { 
    border-left: 3px solid var(--im-green);
}

.stop-item.no-image { 
    border-left: 3px solid var(--im-yellow);
}

.stop-item.drag-over-item { 
    border: 2px dashed var(--im-teal);
    background: var(--ui-accent-color);
    transform: scale(1.02); 
}

.stop-number-badge { 
    background: var(--im-teal);
    color: var(--im-black);
    font-weight: 700; 
    font-size: 1.5em; 
    padding: 10px; 
    border-radius: 6px; 
    text-align: center; 
}

.stop-info { 
    flex: 1; 
}

.stop-info-row { 
    display: flex; 
    justify-content: space-between; 
    margin-bottom: 5px; 
    font-size: 0.85em; 
}

.stop-preview { 
    width: 120px; 
    height: 80px; 
    border: 2px solid var(--ui-panel-border);
    border-radius: 6px; 
    overflow: hidden; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    background: var(--ui-modal-bg);
    backdrop-filter: blur(var(--ui-glass-blur));
}

.stop-preview img { 
    width: 100%; 
    height: 100%; 
    object-fit: cover; 
}

.stop-preview.empty { 
    color: var(--im-warm-grey);
    font-size: 0.8em; 
    text-align: center; 
}

.stop-actions { 
    display: flex; 
    gap: 8px; 
    flex-direction: column; 
}

.stop-actions button { 
    width: auto; 
    padding: 6px 10px; 
    font-size: 0.75em; 
}

/* Status Bar */
.status-bar { 
    background: var(--ui-panel-colour);
    backdrop-filter: blur(var(--ui-glass-blur));
    border: 1px solid var(--ui-panel-border);
    border-radius: 6px; 
    padding: 12px; 
    margin-bottom: 15px; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
}

.status-progress { 
    flex: 1; 
    margin-right: 15px; 
}

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

.progress-fill { 
    height: 100%; 
    background: linear-gradient(90deg, var(--im-green), var(--im-teal));
    transition: width 0.3s; 
}

.status-text { 
    font-size: 0.9em; 
    margin-top: 5px; 
    color: var(--ui-menu-colour);
}

/* Batch Upload Area */
.batch-upload-area { 
    background: var(--ui-panel-colour);
    backdrop-filter: blur(var(--ui-glass-blur));
    border: 2px dashed var(--im-green);
    border-radius: 8px; 
    padding: 30px; 
    text-align: center; 
    margin-bottom: 20px; 
    cursor: pointer; 
    transition: all 0.2s; 
    box-shadow: var(--box-shadow);
}

.batch-upload-area:hover { 
    border-color: var(--im-teal);
    background: var(--ui-accent-color);
}

.batch-upload-area.drag-over { 
    border-color: var(--im-teal);
    background: var(--ui-accent-color);
    transform: scale(1.02); 
}

/* Progress Container */
.progress-container { 
    background: var(--ui-modal-bg);
    backdrop-filter: blur(var(--ui-glass-blur));
    border: 1px solid var(--ui-panel-border);
    border-radius: 8px; 
    padding: 20px; 
    margin-top: 15px; 
    display: none; 
    box-shadow: var(--box-shadow);
}

.progress-container.active { 
    display: block; 
}

.progress-header { 
    display: flex; 
    justify-content: space-between; 
    margin-bottom: 10px; 
    font-size: 0.9em; 
}

.progress-bar-outer { 
    height: 24px; 
    background: var(--ui-modal-header);
    border: 2px solid var(--ui-panel-border);
    border-radius: 12px; 
    overflow: hidden; 
    position: relative; 
}

.progress-bar-inner { 
    height: 100%; 
    background: linear-gradient(90deg, var(--im-green), var(--im-teal));
    transition: width 0.3s; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    color: var(--im-black);
    font-weight: 600; 
    font-size: 0.85em; 
}

.progress-stats { 
    display: grid; 
    grid-template-columns: 1fr 1fr 1fr; 
    gap: 15px; 
    margin-top: 15px; 
}

.progress-stat { 
    text-align: center; 
}

.progress-stat-value { 
    font-size: 1.5em; 
    font-weight: 700; 
    color: var(--im-teal);
}

.progress-stat-label { 
    font-size: 0.8em; 
    color: var(--ui-menu-colour);
    margin-top: 5px; 
}

/* Responsive Design */
@media (max-width: 1024px) { 
    body { 
        flex-direction: column; 
    }
    
    .sidebar { 
        width: 100%; 
        border-right: none; 
        border-bottom: 2px solid #2a3f5f; 
        flex-direction: row; 
        overflow-x: auto; 
    }
    
    .container { 
        grid-template-columns: 1fr; 
    } 
    
    .button-group { 
        grid-template-columns: 1fr; 
    } 
}