/* ==========================================================================
           1. MODERN ULTRA-SAAS DESIGN SYSTEM (VARIABLES)
           ========================================================================== */
        :root[data-theme="dark"] {
            --bg-main: #080c14;
            --bg-sidebar: #04070d;
            --bg-surface: #0e1726;
            --bg-surface-hover: #142034;
            --bg-element: #16233b;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-highlight: rgba(59, 130, 246, 0.4);
            
            --text-heading: #ffffff;
            --text-body: #94a3b8;
            --text-muted: #64748b;
            
            --brand-primary: #3b82f6;
            --brand-gradient: linear-gradient(135deg, #2563eb, #4f46e5);
            
            --status-progress-bg: rgba(59, 130, 246, 0.12);
            --status-progress: #60a5fa;
            --status-waiting-bg: rgba(245, 158, 11, 0.12);
            --status-waiting: #fbbf24;
            --status-ready-bg: rgba(16, 185, 129, 0.12);
            --status-ready: #34d399;
            --status-danger-bg: rgba(244, 63, 94, 0.12);
            --status-danger: #f43f5e;
            
            --shadow-subtle: 0 10px 30px -10px rgba(0,0,0,0.5);
            --plate-bg: #ffffff;
            --plate-text: #000000;
        }

        :root[data-theme="light"] {
            --bg-main: #f1f5f9;
            --bg-sidebar: #ffffff;
            --bg-surface: #ffffff;
            --bg-surface-hover: #f8fafc;
            --bg-element: #e2e8f0;
            --border-color: #e2e8f0;
            --border-highlight: rgba(37, 99, 235, 0.4);
            
            --text-heading: #0f172a;
            --text-body: #334155;
            --text-muted: #64748b;
            
            --brand-primary: #2563eb;
            --brand-gradient: linear-gradient(135deg, #1d4ed8, #4338ca);
            
            --status-progress-bg: rgba(37, 99, 235, 0.1);
            --status-progress: #1d4ed8;
            --status-waiting-bg: rgba(217, 119, 6, 0.1);
            --status-waiting: #b45309;
            --status-ready-bg: rgba(5, 150, 105, 0.1);
            --status-ready: #047857;
            --status-danger-bg: rgba(225, 29, 72, 0.1);
            --status-danger: #e11d48;
            
            --shadow-subtle: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
            --plate-bg: #f8fafc;
            --plate-text: #0f172a;
        }

        /* RESET & BASE */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Plus Jakarta Sans', sans-serif;
            transition: background 0.2s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.2s, color 0.2s;
        }

        body {
            background-color: var(--bg-main);
            color: var(--text-body);
            display: flex;
            min-height: 100vh;
        }

        /* SIDEBAR & WORKSPACE LAYOUT */
        aside.sidebar {
            width: 280px;
            background-color: var(--bg-sidebar);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: sticky;
            top: 0;
            height: 100vh;
        }

        main.workspace {
            flex: 1;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        header.navbar {
            height: 80px;
            background-color: var(--bg-sidebar);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 2.5rem;
            position: sticky;
            top: 0;
            z-index: 40;
        }

        .content-area {
            padding: 2.5rem;
            display: flex;
            flex-direction: column;
            gap: 2.5rem;
        }

        /* UI SECTION CARD */
        .component-section {
            background-color: var(--bg-surface);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 1.75rem;
            box-shadow: var(--shadow-subtle);
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .section-head {
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 1rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .section-head h2 {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text-heading);
        }

        /* ==========================================================================
           2. FORM INPUTS & FIELD CONTROLS
           ========================================================================== */
        .form-grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.25rem;
        }

        .form-grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.25rem;
        }

        @media (max-width: 900px) {
            .form-grid-2, .form-grid-3 { grid-template-columns: 1fr; }
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
        }

        .form-label {
            font-size: 0.775rem;
            font-weight: 700;
            color: var(--text-heading);
            display: flex;
            align-items: center;
            gap: 0.35rem;
        }

        .form-label span.req { color: var(--status-danger); }

        .form-input, .form-select, .form-textarea {
            width: 100%;
            background-color: var(--bg-main);
            border: 1px solid var(--border-color);
            padding: 0.75rem 1rem;
            border-radius: 12px;
            color: var(--text-heading);
            font-size: 0.85rem;
            font-weight: 500;
            outline: none;
        }

        .form-input:focus, .form-select:focus, .form-textarea:focus {
            border-color: var(--brand-primary);
        }

        /* Radio & Checkbox Cards */
        .option-card-group {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 0.75rem;
        }

        .option-card-label {
            background-color: var(--bg-main);
            border: 1px solid var(--border-color);
            padding: 0.75rem 1rem;
            border-radius: 12px;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--text-body);
        }

        .option-card-label input[type="radio"], 
        .option-card-label input[type="checkbox"] {
            accent-color: var(--brand-primary);
        }

        .option-card-label:has(input:checked) {
            border-color: var(--brand-primary);
            background-color: var(--status-progress-bg);
            color: var(--brand-primary);
        }

        /* ==========================================================================
           3. DETAIL CARDS & DRAWER COMPONENTS
           ========================================================================== */
        .detail-card {
            background-color: var(--bg-main);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 1.25rem;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .detail-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
        }

        .detail-label { color: var(--text-muted); font-weight: 600; }
        .detail-value { color: var(--text-heading); font-weight: 800; }

        /* License Plate */
        .license-plate {
            background-color: var(--plate-bg);
            color: var(--plate-text);
            border: 1.5px solid #94a3b8;
            padding: 0.25rem 0.6rem;
            border-radius: 6px;
            font-weight: 800;
            font-size: 0.775rem;
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
        }

        .license-plate .tr-code {
            background-color: #1d4ed8;
            color: #ffffff;
            font-size: 0.55rem;
            font-weight: 900;
            padding: 0.1rem 0.25rem;
            border-radius: 2px;
        }

        /* Buttons & Actions */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 1.4rem;
            font-size: 0.85rem;
            font-weight: 700;
            border-radius: 7px;
            border: none;
            cursor: pointer;
            text-decoration: none;
        }

        .btn-primary { background: var(--brand-gradient); color: #fff; }
        .btn-secondary { background-color: var(--bg-element); color: var(--text-heading); border: 1px solid var(--border-color); }
        .btn-danger { background-color: var(--status-danger-bg); color: var(--status-danger); border: 1px solid rgba(244,63,94,0.2); }
        .btn-success { background-color: var(--status-ready-bg); color: var(--status-ready); border: 1px solid rgba(16,185,129,0.2); }

        .theme-toggle-btn {
            background-color: var(--bg-main);
            border: 1px solid var(--border-color);
            color: var(--text-heading);
            width: 42px;
            height: 42px;
            border-radius: 7px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
        }

        @media (max-width: 992px) {
            body {
                display: block;
            }

            aside.sidebar {
                position: relative;
                width: 100%;
                height: auto;
                border-right: 0;
                border-bottom: 1px solid var(--border-color);
            }

            header.navbar {
                height: auto;
                min-height: 72px;
                padding: 0.75rem 1rem;
                gap: 0.75rem;
                flex-wrap: wrap;
            }

            .content-area {
                padding: 1rem;
                gap: 1.25rem;
            }

            .component-section {
                border-radius: 14px;
                padding: 1rem;
            }
        }

        @media (max-width: 768px) {
            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.5rem;
            }

            .detail-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.25rem;
            }

            .btn {
                width: 100%;
            }
        }