/* Data Pipeline Flowchart — style.css — Data Engineering Dark Mode */

:root {
    --bg: #0C0A1D;
    --bg2: #10102A;
    --surface: #161630;
    --surface2: #1C1C3D;
    --border: #2A2A5A;
    --blue: #3B82F6;
    --blue2: #93C5FD;
    --green: #10B981;
    --green2: #6EE7B7;
    --purple: #8B5CF6;
    --orange: #F59E0B;
    --red: #EF4444;
    --text: #E2E8F4;
    --muted: #4A5280;
    --mono: 'JetBrains Mono', monospace;
    --sans: 'Inter', system-ui;
    --radius: 10px;
    --node-src-bg: rgba(59, 130, 246, 0.12);
    --node-src-br: #3B82F6;
    --node-tfm-bg: rgba(16, 185, 129, 0.12);
    --node-tfm-br: #10B981;
    --node-snk-bg: rgba(139, 92, 246, 0.12);
    --node-snk-br: #8B5CF6;
}

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

html,
body {
    height: 100%;
    overflow: hidden;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    font-size: 13px;
    -webkit-font-smoothing: antialiased;
}

.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* ── Header ──────────────────────────────────────────── */
.app-header {
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    padding: 8px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    gap: 10px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    color: var(--blue);
    font-size: 1.2rem;
}

h1 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--blue2);
}

.logo-badge {
    font-size: 0.58rem;
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: var(--blue);
    border-radius: 4px;
    padding: 1px 7px;
}

.header-actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

/* ── App body ────────────────────────────────────────── */
.app-body {
    flex: 1;
    display: grid;
    grid-template-columns: 190px 1fr 280px;
    min-height: 0;
    overflow: hidden;
}

/* ── Palette ─────────────────────────────────────────── */
.palette {
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 10px;
    background: var(--bg2);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.palette-section {
    margin-bottom: 12px;
}

.palette-label {
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted);
    font-weight: 700;
    margin-bottom: 6px;
}

.node-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: 8px;
    border: 1px solid var(--border);
    cursor: grab;
    user-select: none;
    font-size: 0.78rem;
    font-weight: 500;
    transition: all 0.15s;
    background: var(--surface);
}

.node-item:hover {
    transform: translateX(2px);
}

.node-item.source:hover {
    border-color: var(--blue);
    background: var(--node-src-bg);
}

.node-item.transform:hover {
    border-color: var(--green);
    background: var(--node-tfm-bg);
}

.node-item.sink:hover {
    border-color: var(--purple);
    background: var(--node-snk-bg);
}

.node-item:active {
    cursor: grabbing;
    opacity: 0.7;
}

.ni-icon {
    font-size: 1rem;
}

.ni-label {}

/* ── Canvas area ─────────────────────────────────────── */
.canvas-area {
    position: relative;
    overflow: hidden;
    background: var(--bg);
}

#pipeline-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.nodes-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.canvas-hint {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--muted);
    font-size: 0.8rem;
    text-align: center;
    pointer-events: none;
    transition: opacity 0.3s;
}

/* ── Pipeline nodes (DOM overlay) ────────────────────── */
.pipeline-node {
    position: absolute;
    width: 140px;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1.5px solid;
    cursor: pointer;
    pointer-events: all;
    user-select: none;
    transition: box-shadow 0.15s, transform 0.15s;
    backdrop-filter: blur(4px);
}

.pipeline-node.source {
    background: var(--node-src-bg);
    border-color: var(--node-src-br);
}

.pipeline-node.transform {
    background: var(--node-tfm-bg);
    border-color: var(--node-tfm-br);
}

.pipeline-node.sink {
    background: var(--node-snk-bg);
    border-color: var(--node-snk-br);
}

.pipeline-node:hover {
    transform: scale(1.02);
    z-index: 10;
}

.pipeline-node.selected {
    box-shadow: 0 0 0 2px #fff, 0 0 20px rgba(59, 130, 246, 0.4);
}

.pn-icon {
    font-size: 1.2rem;
    display: block;
    text-align: center;
    margin-bottom: 4px;
}

.pn-label {
    font-size: 0.72rem;
    text-align: center;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pn-sub {
    font-size: 0.6rem;
    text-align: center;
    color: var(--muted);
    margin-top: 2px;
}

.pn-ports {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
}

.pn-port {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid;
    cursor: crosshair;
    background: var(--bg);
    pointer-events: all;
    transition: background 0.15s;
}

.pn-port.in {
    border-color: var(--blue);
}

.pn-port.out {
    border-color: var(--green);
}

.pn-port:hover {
    background: var(--blue);
}

.pn-port.out:hover {
    background: var(--green);
}

/* ── Right panel ─────────────────────────────────────── */
.right-panel {
    border-left: 1px solid var(--border);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 12px;
}

/* Properties */
.props-panel {}

.panel-title {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    font-weight: 700;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.props-content {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.prop-row {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.prop-label {
    font-size: 0.62rem;
    text-transform: uppercase;
    color: var(--muted);
    font-weight: 600;
    letter-spacing: 0.06em;
}

.prop-input,
.prop-select {
    background: var(--surface2);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 6px;
    padding: 6px 8px;
    font-size: 0.75rem;
    outline: none;
    width: 100%;
}

.prop-input:focus,
.prop-select:focus {
    border-color: var(--blue);
}

/* Code panel */
.code-panel {
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
}

.code-panel .panel-title {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    margin: 0;
    justify-content: space-between;
}

.code-tabs {
    display: flex;
    gap: 2px;
}

.code-tab {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--muted);
    border-radius: 4px;
    padding: 2px 10px;
    font-size: 0.65rem;
    cursor: pointer;
    transition: all 0.15s;
}

.code-tab.active {
    background: var(--blue);
    border-color: var(--blue);
    color: #fff;
    font-weight: 600;
}

.code-block {
    display: none;
}

.code-block.active {
    display: block;
}

.code-block pre {
    padding: 10px 12px;
    font-family: var(--mono);
    font-size: 0.65rem;
    color: var(--green2);
    overflow-x: auto;
    max-height: 280px;
    overflow-y: auto;
}

.code-hint {
    color: var(--muted);
    font-style: italic;
}

.code-panel>div:last-of-type {
    padding: 8px 12px;
    border-top: 1px solid var(--border);
}

/* Validation */
.validation-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px;
}

.validation-panel.hidden {
    display: none;
}

.val-ok {
    color: var(--green);
    font-size: 0.78rem;
}

.val-warn {
    color: var(--orange);
    font-size: 0.78rem;
}

.val-err {
    color: var(--red);
    font-size: 0.78rem;
}

/* ── Modal ───────────────────────────────────────────── */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.hidden {
    display: none;
}

.modal-body {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    width: 100%;
    max-width: 420px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.modal-hdr {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
}

.modal-hdr h2 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--blue2);
}

.modal-form {
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.modal-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 8px;
}

/* ── Buttons ─────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 12px;
    border-radius: 7px;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.18s;
    white-space: nowrap;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: var(--blue);
    color: #fff;
}

.btn-primary:hover {
    background: #2563EB;
}

.btn-secondary {
    background: var(--surface2);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-ghost {
    background: transparent;
    color: var(--muted);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    color: var(--text);
    border-color: var(--blue);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--red);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    background: var(--red);
    color: #fff;
}

.btn-sm {
    padding: 4px 10px;
    font-size: 0.7rem;
}

/* ── Toast ───────────────────────────────────────────── */
#toast-wrap {
    position: fixed;
    bottom: 16px;
    right: 16px;
    z-index: 600;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.toast {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 14px;
    font-size: 0.8rem;
    animation: slide-up 0.2s ease;
}

.toast.ok {
    border-color: rgba(16, 185, 129, 0.4);
    color: var(--green2);
}

.toast.err {
    border-color: rgba(239, 68, 68, 0.4);
    color: var(--red);
}

.toast.warn {
    border-color: rgba(245, 158, 11, 0.4);
    color: var(--orange);
}

@keyframes slide-up {
    from {
        transform: translateY(8px);
        opacity: 0;
    }
}

.empty-state {
    color: var(--muted);
    font-size: 0.78rem;
    text-align: center;
    padding: 20px 0;
}

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 860px) {

    html,
    body {
        overflow: auto;
    }

    .app,
    .app-body {
        height: auto;
        overflow: auto;
    }

    .app-body {
        grid-template-columns: 1fr;
    }

    .canvas-area {
        height: 320px;
    }
}