:root {
    /* RETRO LIGHT THEME */
    --bg-desktop: #2b5b5c;
    --bg-panel: #dfdfd1;
    --bg-hover: #c9c9b9;
    --text-primary: #000000;
    --text-secondary: #222222; /* High contrast text */
    
    --header-bg: linear-gradient(90deg, #0000a0, #1084d0);
    --header-text: #ffffff;
    
    --border-light: #ffffff;
    --border-shadow: #808080;
    --border-dark-shadow: #000000;

    --accent-run: #006400; /* WCAG compliant green */
    
    --font-ui: 'Tahoma', 'MS Sans Serif', Arial, sans-serif;
    --font-mono: 'Source Code Pro', 'Courier New', monospace;
}

/* Accessibility Utility Class */
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

[data-theme="dark"] {
    /* RETRO DARK THEME */
    --bg-desktop: #112526;
    --bg-panel: #2e2e2e;
    --bg-hover: #404040;
    --text-primary: #ffffff;
    --text-secondary: #d0d0d0;
    
    --header-bg: linear-gradient(90deg, #001a40, #004080);
    --header-text: #ffffff;
    
    --border-light: #555555;
    --border-shadow: #1a1a1a;
    --border-dark-shadow: #000000;

    --accent-run: #4caf50;
}

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

body {
    background-color: var(--bg-desktop);
    color: var(--text-primary);
    font-family: var(--font-ui);
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Accessible Focus States */
:focus-visible {
    outline: 2px solid #ffcc00;
    outline-offset: 1px;
}

/* Scrollbars Retro */
::-webkit-scrollbar {
    width: 16px;
    height: 16px;
    background-color: var(--bg-panel);
    border-left: 1px solid var(--border-shadow);
}
::-webkit-scrollbar-thumb {
    background-color: var(--bg-panel);
    box-shadow: inset 1px 1px 0px var(--border-light), 
                inset -1px -1px 0px var(--border-dark-shadow),
                inset 2px 2px 0px var(--border-light), 
                inset -2px -2px 0px var(--border-shadow);
}
::-webkit-scrollbar-button {
    background-color: var(--bg-panel);
    box-shadow: inset 1px 1px 0px var(--border-light), 
                inset -1px -1px 0px var(--border-dark-shadow);
    display: block;
    height: 16px;
    width: 16px;
}

/* APP CONTAINER */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
    padding: clamp(4px, 1vw, 8px);
    gap: clamp(4px, 1vw, 8px);
}

/* TOP NAV */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: clamp(4px, 0.8vw, 8px);
    background-color: var(--bg-panel);
    box-shadow: inset 1px 1px 0px var(--border-light), 
                inset -1px -1px 0px var(--border-dark-shadow),
                inset 2px 2px 0px var(--border-light), 
                inset -2px -2px 0px var(--border-shadow);
    gap: 8px;
    flex-wrap: wrap;
}

.main-heading {
    font-size: clamp(0.85rem, 1.3vw, 1.15rem);
    font-weight: bold;
    margin: 0;
    padding: 0 4px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.main-heading .brand-tag {
    color: var(--header-text);
    background: var(--header-bg);
    padding: 2px 6px;
    font-size: clamp(0.75rem, 1vw, 0.9rem);
    border-radius: 2px;
}

.nav-header-row, .nav-controls-row {
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-header-row {
    justify-content: space-between;
}
.nav-actions-group {
    display: flex;
    align-items: center;
    gap: 6px;
}
.db-select-input {
    max-width: 240px;
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hidden;
}

/* Retro Buttons */
.nav-btn {
    background-color: var(--bg-panel);
    color: var(--text-primary);
    padding: clamp(3px, 0.5vw, 5px) clamp(8px, 1vw, 14px);
    font-family: var(--font-ui);
    font-size: clamp(0.75rem, 0.95vw, 0.85rem);
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: inset 1px 1px 0px var(--border-light), 
                inset -1px -1px 0px var(--border-dark-shadow),
                inset 2px 2px 0px var(--border-light), 
                inset -2px -2px 0px var(--border-shadow);
    border: none;
    outline: none;
}

.nav-btn:active {
    box-shadow: inset 1px 1px 0px var(--border-dark-shadow), 
                inset -1px -1px 0px var(--border-light),
                inset 2px 2px 0px var(--border-shadow);
    padding: 5px 11px 3px 13px; /* visual shift */
}

.btn-run {
    color: var(--accent-run);
}

/* LAYOUT GRID */
.app-layout {
    display: flex;
    flex-grow: 1;
    overflow: hidden;
    gap: 8px;
}

.layout-left, .layout-right {
    width: 280px;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    flex-shrink: 0;
    gap: 8px;
}

.layout-mid {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    gap: 8px;
}

/* SIDEBAR SECTIONS (Retro Windows) */
.sidebar-section {
    background-color: var(--bg-panel);
    box-shadow: inset 1px 1px 0px var(--border-light), 
                inset -1px -1px 0px var(--border-dark-shadow),
                inset 2px 2px 0px var(--border-light), 
                inset -2px -2px 0px var(--border-shadow);
    padding: 2px;
    display: flex;
    flex-direction: column;
}

.section-title {
    font-size: 13px;
    font-weight: bold;
    padding: 4px 6px;
    background: var(--header-bg);
    color: var(--header-text);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Add faux retro window controls using ::after */
.section-title::after {
    content: "✖";
    display: inline-block;
    background-color: var(--bg-panel);
    color: var(--text-primary);
    font-size: 10px;
    padding: 1px 4px;
    box-shadow: inset 1px 1px 0px var(--border-light), 
                inset -1px -1px 0px var(--border-dark-shadow);
    cursor: default;
}

.section-subtitle {
    font-size: 12px;
    color: var(--text-secondary);
    padding: 6px 8px;
    border-bottom: 1px solid var(--border-shadow);
    background-color: var(--bg-panel);
}

.text-center {
    text-align: left; /* Windows 95 titles were usually left-aligned */
}

/* SCHEMA LIST */
.schema-list {
    list-style: none;
    margin: 0;
    padding: 4px;
    background-color: #ffffff; /* Classic white for lists in retro os */
    color: #000000;
    border: 2px solid;
    border-color: var(--border-shadow) var(--border-light) var(--border-light) var(--border-shadow);
    margin: 4px;
}
[data-theme="dark"] .schema-list {
    background-color: #1a1a1a;
    color: #e0e0e0;
}

.schema-table-name {
    font-size: 13px;
    font-weight: bold;
    padding: 4px 8px;
    cursor: pointer;
}
.schema-table-name:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.schema-column {
    font-size: 12px;
    padding: 4px 8px 4px 24px;
    cursor: pointer;
}
.schema-column:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

/* EDITOR */
.editor-container {
    flex: 1 1 auto;
    min-height: 200px;
    position: relative;
    background-color: var(--bg-panel);
    box-shadow: inset 1px 1px 0px var(--border-light), 
                inset -1px -1px 0px var(--border-dark-shadow),
                inset 2px 2px 0px var(--border-light), 
                inset -2px -2px 0px var(--border-shadow);
    padding: 4px;
}

.CodeMirror {
    height: 100% !important;
    font-family: var(--font-mono) !important;
    font-size: 14px;
    border: 2px solid;
    border-color: var(--border-shadow) var(--border-light) var(--border-light) var(--border-shadow);
}

/* RESIZER */
.resizer {
    height: 6px;
    background-color: var(--bg-panel);
    cursor: row-resize;
    position: relative;
    z-index: 10;
    box-shadow: inset 1px 1px 0px var(--border-light), 
                inset -1px -1px 0px var(--border-dark-shadow);
}

/* RESULTS PANEL */
.results-panel {
    height: 250px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-panel);
    box-shadow: inset 1px 1px 0px var(--border-light), 
                inset -1px -1px 0px var(--border-dark-shadow),
                inset 2px 2px 0px var(--border-light), 
                inset -2px -2px 0px var(--border-shadow);
    padding: 4px;
    overflow: hidden;
}

.placeholder-msg {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    text-align: center;
    background-color: #ffffff;
    border: 2px solid;
    border-color: var(--border-shadow) var(--border-light) var(--border-light) var(--border-shadow);
}
[data-theme="dark"] .placeholder-msg { background-color: #1a1a1a; }

.placeholder-msg h2 {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-weight: bold;
}
.placeholder-msg p {
    font-size: 13px;
    line-height: 1.5;
}

.results-content-wrapper {
    height: 100%;
    overflow: auto;
    background-color: #ffffff;
    border: 2px solid;
    border-color: var(--border-shadow) var(--border-light) var(--border-light) var(--border-shadow);
}
[data-theme="dark"] .results-content-wrapper { background-color: #1a1a1a; }

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    border: 1px solid var(--border-shadow);
    padding: 6px;
    font-size: 13px;
    text-align: left;
    color: #000000;
}
[data-theme="dark"] th, [data-theme="dark"] td { color: #e0e0e0; }

th {
    background-color: var(--bg-panel);
    font-weight: bold;
    position: sticky;
    top: 0;
    box-shadow: inset 1px 1px 0px var(--border-light), 
                inset -1px -1px 0px var(--border-dark-shadow);
}

/* RIGHT SIDEBAR ELEMENTS */
.mission-text {
    padding: 12px;
    font-size: 13px;
    color: var(--text-primary);
    line-height: 1.5;
    background-color: var(--bg-panel);
    box-shadow: inset 1px 1px 0px var(--border-light), 
                inset -1px -1px 0px var(--border-dark-shadow),
                inset 2px 2px 0px var(--border-light), 
                inset -2px -2px 0px var(--border-shadow);
}

.mission-actions {
    display: flex;
    gap: 8px;
    padding: 0; /* padding logic moved */
}
.mission-actions .nav-btn {
    flex: 1;
    justify-content: center;
}

.table-info-list {
    padding: 8px;
    font-size: 13px;
    color: var(--text-primary);
    background-color: #ffffff;
    border: 2px solid;
    border-color: var(--border-shadow) var(--border-light) var(--border-light) var(--border-shadow);
    margin: 4px;
}
[data-theme="dark"] .table-info-list { background-color: #1a1a1a; color: #e0e0e0; }

.expected-output-wrapper {
    padding: 4px;
    background-color: var(--bg-panel);
    overflow-x: auto;
    max-height: 220px;
    overflow-y: auto;
    border: 1px solid var(--border-shadow);
}
.expected-table {
    width: 100%;
    border-collapse: collapse;
    background-color: #ffffff;
    color: #000000;
    font-size: 11px;
    font-family: var(--font-mono);
    border: 2px solid;
    border-color: var(--border-shadow) var(--border-light) var(--border-light) var(--border-shadow);
}
[data-theme="dark"] .expected-table {
    background-color: #1a1a1a;
    color: #ffffff;
}
.expected-table th, .expected-table td {
    padding: 4px 8px;
    border: 1px solid var(--border-shadow);
    text-align: left;
}
.expected-table th {
    background: var(--header-bg);
    color: var(--header-text);
    font-weight: bold;
    font-size: 11px;
}
.expected-table tr:nth-child(even) {
    background-color: rgba(0, 0, 0, 0.04);
}
[data-theme="dark"] .expected-table tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.06);
}

/* HINTING (AUTOCOMPLETE) CSS OVERRIDES FOR RETRO */
.CodeMirror-hints {
    background-color: #ffffff !important;
    border: 2px solid !important;
    border-color: var(--border-shadow) var(--border-dark-shadow) var(--border-dark-shadow) var(--border-shadow) !important;
    font-family: var(--font-ui) !important;
    font-size: 13px !important;
    color: #000 !important;
    box-shadow: 2px 2px 4px rgba(0,0,0,0.5) !important;
    padding: 0 !important;
}
[data-theme="dark"] .CodeMirror-hints {
    background-color: #1a1a1a !important;
    color: #e0e0e0 !important;
}
.CodeMirror-hint {
    padding: 4px 8px !important;
    border-radius: 0 !important;
}
li.CodeMirror-hint-active {
    background-color: var(--bg-hover) !important;
    color: var(--text-primary) !important;
}

/* OTHER MODES (Audit, DnD) */
.audit-container, .dnd-container {
    padding: 16px;
    background-color: var(--bg-panel);
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.audit-token {
    cursor: pointer;
    padding: 2px 4px;
}
.audit-token:hover { background-color: var(--bg-hover); }
.audit-token.error-found { background-color: red; color: #fff; }

.dnd-blocks-source, .dnd-blocks-target {
    border: 2px inset var(--border-shadow);
    min-height: 50px;
    margin-top: 10px;
    padding: 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    background-color: #ffffff;
}
[data-theme="dark"] .dnd-blocks-source, [data-theme="dark"] .dnd-blocks-target { background-color: #1a1a1a; }

.dnd-block {
    background-color: var(--bg-panel);
    padding: 6px 12px;
    box-shadow: inset 1px 1px 0px var(--border-light), 
                inset -1px -1px 0px var(--border-dark-shadow);
    cursor: grab;
    font-size: 13px;
}

/* CUSTOM RETRO MODAL */
#retro-modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}
#retro-modal-overlay.hidden {
    display: none;
}

.retro-modal {
    background-color: var(--bg-panel);
    border: 2px solid;
    border-color: var(--border-light) var(--border-dark-shadow) var(--border-dark-shadow) var(--border-light);
    width: 300px;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
}

.retro-modal-header {
    background: var(--header-bg);
    color: var(--header-text);
    padding: 4px 6px;
    font-weight: bold;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
}

.retro-modal-close {
    background-color: var(--bg-panel);
    color: var(--text-primary);
    border: none;
    box-shadow: inset 1px 1px 0px var(--border-light), 
                inset -1px -1px 0px var(--border-dark-shadow);
    cursor: pointer;
    width: 16px;
    height: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 10px;
}
.retro-modal-close:active {
    box-shadow: inset 1px 1px 0px var(--border-dark-shadow), 
                inset -1px -1px 0px var(--border-light);
}

.retro-modal-body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    text-align: center;
    font-size: 13px;
}

.retro-modal-buttons {
    display: flex;
    justify-content: center;
    gap: 8px;
}
.retro-modal-buttons .nav-btn {
    min-width: 80px;
    justify-content: center;
}

/* ENCYCLOPEDIA FLOATING WINDOW */
.retro-window {
    position: fixed;
    top: 50px;
    right: 50px;
    width: min(350px, 92vw);
    background-color: var(--bg-panel);
    border: 2px solid;
    border-color: var(--border-light) var(--border-dark-shadow) var(--border-dark-shadow) var(--border-light);
    box-shadow: 4px 4px 10px rgba(0,0,0,0.5);
    z-index: 10000;
    display: flex;
    flex-direction: column;
}
.retro-window.hidden {
    display: none;
}
.retro-window-header {
    background: var(--header-bg);
    color: var(--header-text);
    padding: 4px 6px;
    font-weight: bold;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    cursor: move; /* Indicates draggability */
}
.retro-window-body {
    padding: 12px;
    color: var(--text-primary);
    max-height: 70vh;
    overflow-y: auto;
}
.docs-example-box {
    background-color: #000000 !important;
    color: #ffffff !important;
    padding: 8px 10px;
    border: 1px solid #444444;
    border-radius: 2px;
    margin-top: 4px;
}
.docs-example-box strong {
    color: #4caf50;
    font-size: 11px;
}
#docs-item-example {
    font-family: var(--font-mono);
    font-size: 12px;
    color: #ffffff !important;
    background: transparent !important;
    display: inline-block;
    margin-top: 4px;
    line-height: 1.4;
    word-break: break-all;
}

/* MINI TOGGLE BUTTONS FOR SECTION HEADERS */
.section-title-toggle {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nav-btn-mini {
    background-color: var(--bg-panel);
    color: var(--text-primary);
    padding: 1px 6px;
    font-family: var(--font-ui);
    font-size: 10px;
    font-weight: bold;
    cursor: pointer;
    border: 1px solid var(--border-shadow);
    box-shadow: inset 1px 1px 0px var(--border-light), 
                inset -1px -1px 0px var(--border-dark-shadow);
}
.nav-btn-mini:active {
    box-shadow: inset -1px -1px 0px var(--border-light), 
                inset 1px 1px 0px var(--border-dark-shadow);
}

/* MOBILE TAB BAR (DESKTOP HIDDEN) */
.mobile-tab-bar {
    display: none;
    background-color: var(--bg-panel);
    padding: 4px;
    gap: 4px;
    border-bottom: 2px solid var(--border-shadow);
}
.mobile-tab-btn {
    flex: 1;
    background-color: var(--bg-panel);
    color: var(--text-primary);
    border: none;
    padding: 8px 4px;
    font-family: var(--font-ui);
    font-size: 12px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    min-height: 44px; /* Touch target accessibility */
    box-shadow: inset 1px 1px 0px var(--border-light), 
                inset -1px -1px 0px var(--border-dark-shadow);
}
.mobile-tab-btn.active {
    background-color: var(--bg-hover);
    box-shadow: inset -1px -1px 0px var(--border-light), 
                inset 1px 1px 0px var(--border-dark-shadow);
    color: var(--text-primary);
    font-weight: bold;
}

/* RESPONSIVE MEDIA QUERIES */
@media (max-width: 768px) {
    .desktop-only-btn {
        display: none !important;
    }
    .mobile-tab-bar {
        display: flex;
    }
    .app-container {
        padding: 4px;
    }
    .top-nav {
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        padding: 6px;
    }
    .nav-header-row {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    .nav-controls-row {
        width: 100%;
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .db-select-input {
        flex: 1 1 auto;
        min-width: 0;
        max-width: none;
    }
    .main-heading {
        font-size: 0.95rem;
    }
    .app-layout {
        flex-direction: column;
        flex-grow: 1;
        overflow: hidden;
    }
    .layout-left, .layout-mid, .layout-right {
        width: 100% !important;
        height: 100% !important;
        flex-grow: 1;
        overflow-y: auto;
    }
    .mobile-hide-panel {
        display: none !important;
    }
    .mobile-show-panel {
        display: flex !important;
    }
    .retro-window {
        top: 50% !important;
        left: 50% !important;
        right: auto !important;
        transform: translate(-50%, -50%);
        width: 92vw;
    .mobile-mission-banner {
        display: block !important;
    }
}

/* MOBILE MISSION BANNER */
.mobile-mission-banner {
    display: none;
    background-color: var(--bg-panel);
    border: 2px solid;
    border-color: var(--border-light) var(--border-dark-shadow) var(--border-dark-shadow) var(--border-light);
    padding: 6px 10px;
    margin-bottom: 6px;
    box-shadow: inset 1px 1px 0px var(--border-light), 
                inset -1px -1px 0px var(--border-dark-shadow);
    max-height: 110px;
    overflow-y: auto;
    flex-shrink: 0;
}
.mobile-mission-title {
    font-weight: bold;
    font-size: 12px;
    color: var(--text-primary);
    margin-bottom: 3px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 6px;
}
.mobile-mission-text {
    font-size: 11px;
    line-height: 1.4;
    color: var(--text-secondary);
}

/* DIFFICULTY BADGES & OPTGROUP STYLES */
optgroup {
    background-color: var(--bg-panel);
    color: var(--text-primary);
    font-weight: bold;
    font-style: normal;
}
option {
    background-color: var(--bg-panel);
    color: var(--text-primary);
    padding: 2px 4px;
}
.difficulty-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 6px;
    font-size: 10px;
    font-family: var(--font-mono);
    font-weight: bold;
    border-radius: 2px;
    border: 1px solid var(--border-shadow);
    text-transform: uppercase;
}
.badge-easy {
    background-color: #1b5e20;
    color: #ffffff !important;
}
.badge-medium {
    background-color: #e65100;
    color: #ffffff !important;
}
.badge-hard {
    background-color: #b71c1c;
    color: #ffffff !important;
}