:root {
      --primary-color: #4a90e2;
      --secondary-color: #50e3c2;
      --background-color: #f4f7f6;
      --surface-color: #ffffff;
      --text-color: #333;
      --text-light-color: #777;
      --error-color: #d0021b;
      --danger-color: #d0021b;
      --danger-color-hover: #a30015;
      --border-color: #ddd;
      --warning-color: #f5a623;
      --input-bg: #ffffff;
      --th-bg: #f8f9fa;
      --section-bg: #f9f9f9;
      --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
      --border-radius: 8px;
      --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
      --btn-secondary-bg: #eee;
    }

    /* DARK MODE OVERRIDES */
    body.dark-mode {
      --background-color: #121212;
      --surface-color: #1e1e1e;
      --text-color: #e0e0e0;
      --text-light-color: #aaa;
      --border-color: #333;
      --input-bg: #2c2c2c;
      --th-bg: #252525;
      --section-bg: #252525;
      --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
      --btn-secondary-bg: #3a3a3a;
    }
    body.dark-mode input, 
    body.dark-mode select, 
    body.dark-mode textarea {
        background-color: var(--input-bg);
        color: var(--text-color);
        border-color: var(--border-color);
    }
    
    html, body {
      margin: 0;
      padding: 0;
      font-family: var(--font-family);
      background-color: var(--background-color);
      color: var(--text-color);
      -webkit-font-smoothing: antialiased;
      transition: background-color 0.3s, color 0.3s;
    }
    #app {
      height: 100vh;
      width: 100vw;
      display: flex;
      flex-direction: column;
    }
    * { box-sizing: border-box; }
    .main-container {
      flex-grow: 1;
      overflow-y: auto;
      padding: 1rem;
      -webkit-overflow-scrolling: touch;
    }
    
    /* LOGIN LAYOUT FIX */
    .login-container {
        display: flex;
        flex-direction: column; /* Stack vertically */
        justify-content: center;
        align-items: center;
        height: 100%;
        padding: 1rem;
    }
    
    .form-container {
        background: var(--surface-color);
        padding: 2rem;
        border-radius: var(--border-radius);
        box-shadow: var(--box-shadow);
        width: 100%;
        max-width: 400px;
        display: flex;
        flex-direction: column;
        gap: 1.2rem;
    }
    .input-group { display: flex; flex-direction: column; gap: 0.5rem; }
    input, select, textarea {
        width: 100%;
        padding: 0.8rem;
        border: 1px solid var(--border-color);
        border-radius: var(--border-radius);
        font-size: 1rem;
        background-color: var(--input-bg);
        color: var(--text-color);
    }
    .btn {
        padding: 0.8rem 1rem;
        border: none;
        border-radius: var(--border-radius);
        cursor: pointer;
        font-weight: 600;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
    }
    .btn-primary { background-color: var(--primary-color); color: white; }
    .btn-secondary { background-color: var(--btn-secondary-bg); color: var(--text-color); }
    .btn-danger { background-color: var(--danger-color); color: white; }
    .btn-success { background-color: #28a745; color: white; }
    .btn-sm { padding: 0.4rem 0.8rem; font-size: 0.8rem; }
    
    .card {
        background: var(--surface-color);
        border-radius: var(--border-radius);
        padding: 1.5rem;
        margin-bottom: 1rem;
        box-shadow: var(--box-shadow);
    }
    .status-badge {
      padding: 0.3rem 0.6rem;
      border-radius: 1rem;
      font-size: 0.8rem;
      font-weight: 600;
      color: white;
      text-transform: uppercase;
    }
    .status-badge.completed { background-color: #28a745; }
    .status-badge.in-progress { background-color: var(--primary-color); }
    .status-badge.cancelled { background-color: var(--danger-color); }
    .status-badge.pending { background-color: var(--warning-color); color: #333; }

    .photo-gallery {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
      gap: 1rem;
      margin-top: 1rem;
    }
    .photo-gallery img {
      width: 100%;
      height: 100px;
      object-fit: cover;
      border-radius: var(--border-radius);
    }
    
    .offline-banner {
        background-color: var(--warning-color);
        color: #333;
        text-align: center;
        padding: 0.5rem;
        font-weight: bold;
        display: none;
    }
    .offline-banner.visible { display: block; }
    
    .sync-indicator {
        position: fixed;
        bottom: 20px;
        left: 50%;
        transform: translateX(-50%);
        background-color: var(--primary-color);
        color: white;
        padding: 10px 20px;
        border-radius: 50px;
        box-shadow: 0 4px 10px rgba(0,0,0,0.2);
        display: none;
        z-index: 3000;
    }
    .sync-indicator.visible { display: block; }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1rem;
    }
    @media (max-width: 600px) {
      .form-grid { grid-template-columns: 1fr; }
    }
    
    .tabs { display: flex; gap: 10px; border-bottom: 1px solid var(--border-color); margin-bottom: 1rem; overflow-x: auto; }
    .tab-button { padding: 0.5rem 1rem; background: none; border: none; cursor: pointer; border-bottom: 2px solid transparent; white-space: nowrap; color: var(--text-light-color); }
    .tab-button.active { border-bottom-color: var(--primary-color); color: var(--primary-color); font-weight: bold; }
    
    .signature-pad-container {
      border: 1px solid var(--border-color);
      border-radius: var(--border-radius);
      background: white;
    }
    .signature-pad-container canvas { width: 100%; height: 200px; display: block; }

    /* --- RESPONSIVE MENU STYLES --- */
    header {
        position: relative; /* Fix for absolute menu positioning */
        z-index: 2001;
    }

    .header-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 1rem;
        background: var(--surface-color);
        border-bottom: 1px solid var(--border-color);
        position: relative;
        z-index: 2000;
    }

    .desktop-nav {
        display: flex;
        gap: 10px;
        align-items: center;
    }

    /* Updated Hamburger Button Style for Text Character */
    .hamburger-btn {
        display: none; /* Hidden on Desktop */
        background: transparent;
        border: none;
        cursor: pointer;
        padding: 5px 10px;
        font-size: 28px;
        line-height: 1;
        color: var(--primary-color); /* Explicitly set color for visibility */
    }

    .mobile-nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--surface-color);
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        z-index: 1999;
        border-bottom: 1px solid var(--border-color);
    }
    .mobile-nav-menu.open {
        display: flex;
    }
    
    /* Improved Mobile Menu Items */
    .mobile-nav-menu button {
        width: 100%;
        margin-bottom: 0.5rem;
        text-align: left;
        justify-content: flex-start;
        background: transparent; /* Remove default button grey */
        border: none;
        color: var(--text-color); /* Ensure visible in dark mode */
        font-size: 1.1rem;
        padding: 12px;
        border-radius: var(--border-radius);
    }
    .mobile-nav-menu button:active {
        background-color: var(--btn-secondary-bg);
    }
    
    .mobile-bell { display: block; margin-right: 15px; }

    /* --- CAMERA MODAL STYLES --- */
    .camera-modal-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        height: 100dvh; /* Dynamic viewport height for mobile browsers */
        background-color: #000;
        z-index: 4000; /* Ensure on top of everything */
        display: flex;
        flex-direction: column;
        overflow: hidden;
        touch-action: none; /* Prevent scroll on mobile */
    }
    .camera-modal-content {
        flex: 1;
        position: relative;
        display: flex;
        flex-direction: column;
        justify-content: center;
        overflow: hidden;
        background: #000;
    }
    .camera-modal-content video {
        width: 100%;
        height: 100%;
        object-fit: cover;
        max-height: 100dvh;
    }
    .camera-controls {
        position: absolute;
        bottom: 30px;
        left: 0;
        width: 100%;
        display: flex;
        justify-content: center;
        padding-bottom: 20px;
        z-index: 4001;
        pointer-events: none; 
    }
    .camera-capture-button {
        width: 70px;
        height: 70px;
        border-radius: 50%;
        background-color: white;
        border: 4px solid rgba(0,0,0,0.2);
        cursor: pointer;
        pointer-events: auto;
        box-shadow: 0 4px 10px rgba(0,0,0,0.5);
    }
    .camera-capture-button:active {
        transform: scale(0.9);
    }
    .modal-close-button {
        position: absolute;
        top: 20px;
        right: 20px;
        background: rgba(0,0,0,0.5);
        border: none;
        color: white;
        border-radius: 50%;
        width: 40px;
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        z-index: 4002;
    }

    /* --- SCHEDULER GRID STYLES (NEW) --- */
    .scheduler-container { display: flex; gap: 10px; height: calc(100vh - 180px); overflow: hidden; }
    .unscheduled-jobs { 
        width: 240px; 
        flex-shrink: 0; 
        overflow-y: auto; 
        border-right: 1px solid var(--border-color); 
        padding-right: 10px; 
        background: var(--surface-color);
    }
    .unscheduled-job-item {
        background: var(--input-bg);
        border: 1px solid var(--border-color);
        border-radius: 4px;
        padding: 8px;
        margin-bottom: 8px;
        cursor: grab;
        font-size: 0.9rem;
    }
    
    .scheduler-main { 
        flex-grow: 1; 
        overflow: auto; 
        background: var(--surface-color); 
        border: 1px solid var(--border-color); 
        border-radius: 4px; 
        position: relative;
    }

    /* Fixed Layout Table for clear blocks */
    .schedule-grid { 
        width: 100%; 
        min-width: 800px;
        border-collapse: separate; 
        border-spacing: 0; 
        table-layout: fixed; /* Ensures equal columns */
    }
    
    /* Header (Dates) */
    .schedule-grid th { 
        background: var(--th-bg); 
        position: sticky; 
        top: 0; 
        z-index: 10; 
        border-bottom: 1px solid var(--border-color); 
        border-right: 1px solid var(--border-color);
        padding: 8px; 
        font-size: 0.9rem; 
        text-align: center; 
        height: 45px; 
        box-shadow: 0 1px 2px rgba(0,0,0,0.05);
        color: var(--text-color);
    }
    
    /* Cells (Days) */
    .schedule-grid td { 
        border-bottom: 1px solid var(--border-color); 
        border-right: 1px solid var(--border-color); 
        vertical-align: top; 
        padding: 4px; 
        height: 100px; /* Fixed height for blocks */
        transition: background 0.2s; 
        position: relative;
        background: var(--surface-color);
    }
    .schedule-grid td.drag-over { background-color: rgba(74, 144, 226, 0.1) !important; }
    
    /* Zebra Striping */
    .schedule-grid tr:nth-child(even) td { background-color: var(--background-color); }
    .schedule-grid tr:nth-child(even) td:first-child { background-color: var(--th-bg); }

    /* Sticky First Column (Technicians) */
    .schedule-grid th:first-child, 
    .schedule-grid td:first-child {
        position: sticky; 
        left: 0; 
        z-index: 20; 
        border-right: 2px solid var(--border-color); 
        width: 160px; /* Fixed compact width for names */
        min-width: 160px;
    }
    .schedule-grid th:first-child { z-index: 30; background: var(--th-bg); }
    .schedule-grid td:first-child { 
        background: var(--surface-color); 
        vertical-align: middle; 
        padding: 0 10px;
        font-weight: 500;
        font-size: 0.9rem;
    }

    /* Job Chips (Blocks) */
    .schedule-job-chip {
        display: block; 
        padding: 3px 6px; 
        margin-bottom: 3px; 
        border-radius: 3px;
        font-size: 0.75rem; 
        color: white; 
        cursor: pointer; 
        text-decoration: none;
        box-shadow: 0 1px 2px rgba(0,0,0,0.15); 
        transition: transform 0.1s, box-shadow 0.1s;
        border-left: 3px solid rgba(0,0,0,0.2);
        overflow: hidden;
        line-height: 1.2;
    }
    .schedule-job-chip:hover { transform: translateY(-1px); box-shadow: 0 2px 4px rgba(0,0,0,0.2); z-index: 5; position: relative; }
    
    /* Color Coding */
    .schedule-job-chip.completed { background-color: #28a745; }
    .schedule-job-chip.in-progress { background-color: #4a90e2; }
    .schedule-job-chip.cancelled { background-color: #d0021b; }
    .schedule-job-chip.pending { background-color: #f5a623; color: #222; }

    /* --- DAILY VIEW GRID --- */
    .daily-view-container {
      display: flex;
      flex-direction: column;
      height: 100%;
      width: 100%;
      overflow: auto;
      position: relative;
    }
    .daily-header-row {
      display: flex;
      background: var(--th-bg);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 30;
      min-width: max-content;
    }
    .daily-header-cell {
      flex: 1;
      padding: 10px;
      text-align: center;
      font-weight: bold;
      border-right: 1px solid var(--border-color);
      min-width: 150px;
    }
    .daily-time-header-cell {
      width: 80px;
      min-width: 80px;
      flex: none;
      border-right: 1px solid var(--border-color);
      background: var(--th-bg);
      position: sticky;
      left: 0;
      z-index: 40;
    }
    .daily-body {
      display: flex;
      position: relative;
      flex-grow: 1;
      min-width: max-content;
    }
    .daily-time-column {
      width: 80px;
      min-width: 80px;
      flex: none;
      border-right: 1px solid var(--border-color);
      background: var(--surface-color);
      position: sticky;
      left: 0;
      z-index: 20;
    }
    .daily-time-slot-label {
      height: 80px; /* INCREASED: From 60px to 80px for more vertical space */
      border-bottom: 1px solid var(--border-color);
      font-size: 0.8rem;
      color: var(--text-light-color);
      padding: 5px;
      text-align: right;
      position: relative;
    }
    .daily-time-slot-label span {
      position: relative;
      top: -10px; 
      background: var(--surface-color);
      padding-left: 5px;
    }
    .daily-tech-column {
      flex: 1;
      position: relative; /* Context for absolute job cards */
      border-right: 1px solid var(--border-color);
      background: var(--surface-color);
      min-width: 150px;
    }
    .daily-tech-column.drag-over {
      background-color: rgba(74, 144, 226, 0.05);
    }
    .daily-hour-grid-line {
      height: 80px; /* INCREASED: From 60px to 80px */
      border-bottom: 1px solid var(--border-color);
      width: 100%;
      box-sizing: border-box;
    }
    .daily-hour-grid-line.half-hour {
        border-bottom: 1px dashed rgba(0,0,0,0.05);
        position: absolute;
        width: 100%;
        top: 40px; /* ADJUSTED: From 30px to 40px */
        height: 0;
    }
    
    .daily-event {
      position: absolute;
      left: 0; /* Changed from 5px to allow for overlap calculation */
      right: 5px;
      border-radius: 4px;
      padding: 4px;
      font-size: 0.75rem;
      color: white;
      overflow: hidden;
      cursor: pointer;
      box-shadow: 0 2px 4px rgba(0,0,0,0.15);
      z-index: 10;
      border: 1px solid rgba(255,255,255,0.2);
      transition: all 0.2s ease; /* Smooth transition for positioning */
    }
    .daily-event.completed { background-color: #28a745; opacity: 0.9; }
    .daily-event.in-progress { background-color: #4a90e2; }
    .daily-event.cancelled { background-color: #d0021b; }
    .daily-event.pending { background-color: #f5a623; color: #222; }

    /* Scheduler Day View (Mobile) */
    .scheduler-day-view { display: flex; flex-direction: column; gap: 10px; }
    .day-view-resource { background: var(--surface-color); padding: 10px; border: 1px solid var(--border-color); border-radius: 4px; }
    .day-view-drop-zone { min-height: 50px; border: 1px dashed var(--border-color); padding: 5px; margin-top: 5px; border-radius: 4px; }

    /* Mobile Breakpoint */
    @media (max-width: 768px) {
        .desktop-nav { display: none; }
        .hamburger-btn { display: block; }
        .mobile-bell { display: block; margin-right: 15px; }
        .scheduler-container { 
            flex-direction: column; 
            height: calc(100vh - 60px); 
            overflow: hidden; 
        }
        .unscheduled-jobs { 
            width: 100%; 
            max-height: 150px; 
            margin-bottom: 0; 
            border-right: none; 
            border-bottom: 1px solid var(--border-color); 
            overflow-y: auto;
            flex-shrink: 0;
        }
        .scheduler-main { 
            flex: 1;
            height: auto; 
            overflow: hidden; 
            min-height: 0;
        }
    }
    
    .item-list { list-style: none; padding: 0; margin-top: 1rem; }
    .item-list-item { display: flex; justify-content: space-between; align-items: center; padding: 0.75rem 0.5rem; border-bottom: 1px solid var(--border-color); }
    
    .modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.6); display: flex; justify-content: center; align-items: center; z-index: 2500; }
    .modal-content { background: var(--surface-color); padding: 2rem; border-radius: var(--border-radius); width: 90%; max-width: 500px; max-height: 90vh; overflow-y: auto; }
    
    .job-card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; flex-wrap: wrap; gap: 10px; }
    .job-card-actions { display: flex; gap: 5px; flex-wrap: wrap; }

    .version-tag {
        position: fixed;
        bottom: 10px;
        left: 15px;
        font-size: 0.75rem;
        color: var(--text-light-color);
        opacity: 0.7;
        z-index: 3000;
        pointer-events: none;
    }