/* =========================================================================
 * Node Wizard — Sidebar Shell Styles
 * ========================================================================= */

:root {

    --color-bg: #f5f6f8;
    --color-surface: #ffffff;
    --color-text: #1a1a2e;
    --color-text-secondary: #5a5a7a;
    --color-border: #e0e0e8;
    --color-accent: #2563eb;
    --color-accent-light: #eff4ff;
    --color-accent-border: #93b4f8;
    --color-disabled: #c0c0cc;

    --radius: 8px;

    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                  "Helvetica Neue", Arial, sans-serif;

}

/* ---- Reset & Base ---- */

*, *::before, *::after {

    box-sizing: border-box;
    margin: 0;
    padding: 0;

}

body {

    font-family: var(--font-stack);
    font-size: 15px;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;

}

/* ---- Header ---- */

header {

    flex: 0 0 auto;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 24px;
    display: flex;
    align-items: baseline;
    gap: 16px;

}

header h1 {

    font-size: 18px;
    font-weight: 600;

}

header .subtitle {

    color: var(--color-text-secondary);
    font-size: 13px;

}

/* ---- Header action buttons ---- */

.header-actions {

    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;

}

.header-btn {

    padding: 0 12px;
    height: 30px;
    border: 1px solid var(--color-border);
    border-radius: 5px;
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.12s, border-color 0.12s;

}

.header-btn:hover:not(:disabled) {

    background: #edf0f4;
    border-color: #b0b8c4;

}

.header-btn:disabled {

    opacity: 0.4;
    cursor: not-allowed;

}

.header-btn-primary {

    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);

}

.header-btn-primary:hover:not(:disabled) {

    background: #1d4ed8;
    border-color: #1d4ed8;

}

.header-btn-primary:disabled {

    background: var(--color-disabled);
    border-color: var(--color-disabled);

}

.header-btn-wrap {

    position: relative;
    display: inline-block;

}

.header-btn-wrap input[type="file"] {

    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    width: 100%;

}

.header-btn-wrap .header-btn {

    pointer-events: none;

}

.header-checkbox {

    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text);
    cursor: pointer;
    white-space: nowrap;
    user-select: none;

}

.header-checkbox input[type="checkbox"] {

    margin: 0;
    cursor: pointer;

}

.header-sep {

    width: 1px;
    height: 20px;
    background: var(--color-border);
    margin: 0 4px;

}

/* ---- Layout: sidebar + workspace ---- */

.layout {

    flex: 1 1 auto;
    display: flex;
    overflow: hidden;

}

/* ---- Sidebar ---- */

.sidebar {

    flex: 0 0 220px;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    overflow-y: auto;

}

.sidebar-section {

    padding: 16px 12px 8px;

}

.sidebar-section + .sidebar-section {

    border-top: 1px solid var(--color-border);

}

.sidebar-label {

    display: block;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
    padding-left: 4px;

}

/* ---- Sidebar Tiles ---- */

.sidebar-tile {

    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    margin-bottom: 2px;
    border-radius: 6px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: background 0.12s, border-color 0.12s;

}

.sidebar-tile:hover:not(.disabled) {

    background: var(--color-accent-light);

}

.sidebar-tile.selected {

    border-color: var(--color-accent);
    background: var(--color-accent-light);

}

/* Node type tiles use "chosen" — subtler than the active view's "selected" */

.sidebar-tile.chosen {

    border-color: #a5b4c8;
    background: #f0f2f5;

}

.sidebar-tile.disabled {

    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;

}

.tile-icon {

    font-size: 18px;
    flex-shrink: 0;
    width: 24px;
    text-align: center;

}

.tile-content {

    display: flex;
    flex-direction: column;
    min-width: 0;

}

.tile-name {

    font-size: 13px;
    font-weight: 600;
    line-height: 1.3;

}

.tile-desc {

    font-size: 11px;
    color: var(--color-text-secondary);
    line-height: 1.3;
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;

}

.tile-desc.has-file {

    color: #4ec9b0;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 10px;

}

/* ---- Warning badge on tiles ---- */

.sidebar-tile {

    position: relative;

}

.tile-badge {

    position: absolute;
    top: 4px;
    right: 6px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #f59e0b;
    display: none;

}

.tile-badge.visible {

    display: block;

}

.tile-badge.badge-error {

    background: #ef4444;

}

/* ---- Sidebar Footer ---- */

.sidebar-footer {

    margin-top: auto;
    padding: 16px 12px;
    border-top: 1px solid var(--color-border);

}

.btn-primary {

    width: 100%;
    background: var(--color-accent);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;

}

.btn-primary:hover:not(:disabled) {

    background: #1d4ed8;

}

.btn-primary:disabled {

    background: var(--color-disabled);
    cursor: not-allowed;

}

/* ---- Workspace ---- */

.workspace {

    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
    background: var(--color-bg);

}

#workspace-iframe {

    width: 100%;
    height: 100%;
    border: none;
    flex: 1;

}

.workspace-empty {

    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--color-text-secondary);

}

.empty-icon {

    font-size: 36px;
    opacity: 0.4;

}

.empty-text {

    font-size: 15px;
    font-style: italic;

}

/* ---- Utility ---- */

.hidden {

    display: none !important;

}

/* ---- Responsive ---- */

@media (max-width: 700px) {

    .layout {

        flex-direction: column;

    }

    .sidebar {

        flex: 0 0 auto;
        flex-direction: row;
        overflow-x: auto;
        border-right: none;
        border-bottom: 1px solid var(--color-border);

    }

    .sidebar-section {

        display: flex;
        gap: 4px;
        padding: 8px;

    }

    .sidebar-label {

        display: none;

    }

    .sidebar-footer {

        margin-top: 0;
        border-top: none;
        padding: 8px;

    }

}