/* ============================================================
   Fester UI — Shared Design System
   Used by: index.html, ui/live_dag.html, ui/replay.html,
            cockpit/fester-module/ui.html
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
    /* surfaces */
    --bg-0: #07090d;
    --bg-1: #0b0f14;
    --bg-2: #0e141d;
    --bg-3: #131c28;
    --bg-4: #1a2432;

    /* lines */
    --line: #1f2a38;
    --line-2: #2c3b4d;

    /* text */
    --fg-0: #f4f6fa;
    --fg-1: #d0d6df;
    --fg-2: #8a95a5;
    --fg-3: #5a6573;

    /* status */
    --ok: #66bb6a;
    --ok-bg: rgba(102, 187, 106, 0.12);
    --warn: #ffb300;
    --warn-bg: rgba(255, 179, 0, 0.12);
    --err: #ef5350;
    --err-bg: rgba(239, 83, 80, 0.12);
    --info: #42a5f5;
    --info-bg: rgba(66, 165, 245, 0.12);
    --accent: #ffd54f;
    --accent-bg: rgba(255, 213, 79, 0.12);

    /* heat ramp */
    --heat-0: #2ecc71;
    --heat-1: #f1c40f;
    --heat-2: #e67e22;
    --heat-3: #e74c3c;

    /* layout */
    --radius: 6px;
    --radius-lg: 10px;
    --gap: 12px;
    --pad: 12px;
    --topbar-h: 48px;

    /* type */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "JetBrains Mono", "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
    font-family: var(--font-sans);
    font-size: 13px;
    color: var(--fg-1);
    background: var(--bg-1);
    line-height: 1.45;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--info); text-decoration: none; }
a:hover { text-decoration: underline; }
pre, code, .mono { font-family: var(--font-mono); }
button, input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }
h1, h2, h3, h4 { margin: 0 0 8px; font-weight: 600; color: var(--fg-0); }
h1 { font-size: 18px; }
h2 { font-size: 15px; }
h3 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.6px; color: var(--fg-2); }
hr { border: 0; border-top: 1px solid var(--line); margin: 12px 0; }

/* ---------- Topbar / Shell ---------- */
.topbar {
    height: var(--topbar-h);
    background: var(--bg-2);
    border-bottom: 1px solid var(--line);
    display: flex;
    align-items: center;
    padding: 0 16px;
    gap: 16px;
    position: sticky;
    top: 0;
    z-index: 50;
}
.topbar .brand {
    font-weight: 700;
    color: var(--fg-0);
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.topbar .brand .mark {
    width: 22px; height: 22px;
    border-radius: 4px;
    background: linear-gradient(135deg, var(--info), var(--accent));
    display: inline-block;
}
.topbar nav { display: flex; gap: 4px; flex: 1; }
.topbar nav a {
    color: var(--fg-2);
    padding: 6px 12px;
    border-radius: var(--radius);
    font-size: 12px;
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
}
.topbar nav a:hover { background: var(--bg-3); color: var(--fg-0); text-decoration: none; }
.topbar nav a.active { background: var(--bg-4); color: var(--fg-0); }

/* connection pill */
.conn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--bg-3);
    border: 1px solid var(--line-2);
    font-size: 11px;
    font-family: var(--font-mono);
    color: var(--fg-2);
}
.conn .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--fg-3); }
.conn.connecting .dot { background: var(--warn); animation: pulse 1.2s infinite; }
.conn.online .dot { background: var(--ok); box-shadow: 0 0 6px var(--ok); }
.conn.offline .dot { background: var(--err); }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

/* ---------- Buttons ---------- */
button, .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-4);
    color: var(--fg-1);
    border: 1px solid var(--line-2);
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.12s, border-color 0.12s, transform 0.05s;
    font-size: 12px;
    white-space: nowrap;
}
button:hover, .btn:hover { background: var(--bg-3); border-color: #3a4a5e; }
button:active, .btn:active { transform: translateY(1px); }
button:disabled { opacity: 0.4; cursor: not-allowed; }
button.primary { background: var(--info); color: #061018; border-color: var(--info); }
button.primary:hover { filter: brightness(1.1); }
button.danger { background: var(--err); color: #1a0606; border-color: var(--err); }
button.ghost { background: transparent; }
button.full { width: 100%; }

/* ---------- Form inputs ---------- */
input[type="text"], input[type="number"], input[type="search"],
input[type="url"], input[type="password"], select, textarea {
    width: 100%;
    padding: 7px 10px;
    background: var(--bg-0);
    border: 1px solid var(--line-2);
    border-radius: var(--radius);
    color: var(--fg-0);
    font-family: var(--font-mono);
    font-size: 12px;
    outline: none;
    transition: border-color 0.12s;
}
input:focus, select:focus, textarea:focus { border-color: var(--info); }
label { display: block; font-size: 11px; color: var(--fg-2); margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.4px; }
.field { margin-bottom: 10px; }

/* range slider */
input[type="range"] {
    width: 100%;
    -webkit-appearance: none;
    background: transparent;
    height: 24px;
}
input[type="range"]::-webkit-slider-runnable-track {
    height: 4px;
    background: var(--bg-4);
    border-radius: 2px;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px; height: 14px;
    border-radius: 50%;
    background: var(--info);
    margin-top: -5px;
    cursor: pointer;
}

/* ---------- Panels / Cards ---------- */
.panel {
    background: var(--bg-2);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.panel > .head {
    padding: 10px 14px;
    border-bottom: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-3);
}
.panel > .head h3 { margin: 0; }
.panel > .body { padding: var(--pad); }

/* ---------- Badges / Pills ---------- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 10px;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 1px solid var(--line-2);
    background: var(--bg-3);
    color: var(--fg-2);
}
.badge.ok { color: var(--ok); background: var(--ok-bg); border-color: rgba(102,187,106,0.3); }
.badge.warn { color: var(--warn); background: var(--warn-bg); border-color: rgba(255,179,0,0.3); }
.badge.err { color: var(--err); background: var(--err-bg); border-color: rgba(239,83,80,0.3); }
.badge.info { color: var(--info); background: var(--info-bg); border-color: rgba(66,165,245,0.3); }
.badge.accent { color: var(--accent); background: var(--accent-bg); border-color: rgba(255,213,79,0.3); }

/* ---------- Tables ---------- */
table { width: 100%; border-collapse: collapse; font-size: 12px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--fg-2); font-weight: 500; font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; }
tbody tr:hover { background: var(--bg-3); }

/* ---------- Lists ---------- */
.list { list-style: none; padding: 0; margin: 0; }
.list > li { padding: 8px 10px; border-bottom: 1px solid var(--line); }
.list > li:last-child { border-bottom: 0; }

/* ---------- Event Stream ---------- */
.stream {
    font-family: var(--font-mono);
    font-size: 11px;
    height: 100%;
    overflow-y: auto;
    padding: 8px;
    background: var(--bg-0);
    border-radius: var(--radius);
    border: 1px solid var(--line);
}
.stream .row {
    padding: 3px 6px;
    border-radius: 3px;
    display: grid;
    grid-template-columns: 70px 80px 1fr;
    gap: 8px;
    align-items: baseline;
    border-bottom: 1px dashed rgba(255,255,255,0.04);
}
.stream .row:hover { background: var(--bg-2); }
.stream .ts { color: var(--fg-3); }
.stream .tag { font-weight: 600; }
.stream .tag.node { color: var(--info); }
.stream .tag.pipeline { color: var(--warn); }
.stream .tag.failure { color: var(--err); }
.stream .tag.cache { color: var(--accent); }
.stream .tag.debug { color: var(--fg-2); }
.stream .tag.policy { color: #ab47bd; }
.stream .tag.session { color: var(--ok); }
.stream .msg { color: var(--fg-1); word-break: break-word; }

/* ---------- DAG Node (shared) ---------- */
.dag-node {
    position: absolute;
    min-width: 120px;
    padding: 6px 10px;
    font-size: 11px;
    text-align: center;
    border-radius: var(--radius);
    background: var(--bg-3);
    border: 1px solid var(--line-2);
    color: var(--fg-0);
    cursor: pointer;
    user-select: none;
    transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
    z-index: 2;
}
.dag-node:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,0.4); }
.dag-node .label { font-weight: 600; }
.dag-node .meta { font-family: var(--font-mono); font-size: 10px; color: var(--fg-2); margin-top: 2px; }

.dag-node.pending  { border-color: var(--fg-3); }
.dag-node.running  { border-color: var(--warn); box-shadow: 0 0 12px rgba(255,179,0,0.35); }
.dag-node.done     { border-color: var(--ok); }
.dag-node.failed   { border-color: var(--err); background: var(--err-bg); }
.dag-node.cache    { border-color: var(--info); }
.dag-node.critical { outline: 2px solid var(--accent); outline-offset: 2px; }
.dag-node.heat     { box-shadow: 0 0 0 2px var(--heat-2); }
.dag-node.active   { outline: 2px solid var(--accent); outline-offset: 2px; }

/* SVG edges */
svg.edges {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 1;
}
svg.edges line, svg.edges path {
    stroke: var(--line-2);
    stroke-width: 1.5;
    fill: none;
}
svg.edges line.critical, svg.edges path.critical {
    stroke: var(--accent);
    stroke-width: 2.5;
}
svg.edges marker path { fill: var(--line-2); stroke: none; }

/* ---------- Inspector / JSON viewer ---------- */
pre.json {
    margin: 0;
    padding: 10px;
    background: var(--bg-0);
    border-radius: var(--radius);
    border: 1px solid var(--line);
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--fg-1);
    overflow: auto;
    white-space: pre-wrap;
    word-break: break-word;
}

/* ---------- Scrollbars ---------- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-0); }
::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #3a4a5e; }

/* ---------- Utility ---------- */
.row { display: flex; gap: var(--gap); }
.col { display: flex; flex-direction: column; gap: var(--gap); }
.flex-1 { flex: 1; }
.grow { flex-grow: 1; }
.muted { color: var(--fg-2); }
.dim { color: var(--fg-3); }
.right { text-align: right; }
.center { text-align: center; }
.mono { font-family: var(--font-mono); }
.nowrap { white-space: nowrap; }
.hidden { display: none !important; }
.spacer { flex: 1; }

/* heat meter */
.heat-meter {
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--heat-0) 0%, var(--heat-1) 50%, var(--heat-2) 80%, var(--heat-3) 100%);
    position: relative;
}
.heat-meter::after {
    content: "";
    position: absolute;
    top: -2px; bottom: -2px;
    left: var(--heat, 0%);
    width: 2px;
    background: var(--fg-0);
}

/* progress bar */
.progress {
    height: 8px;
    background: var(--bg-0);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--line);
}
.progress > .bar {
    height: 100%;
    background: linear-gradient(90deg, var(--info), var(--ok));
    transition: width 0.3s ease;
}

/* toasts */
#toasts {
    position: fixed;
    bottom: 16px;
    right: 16px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 360px;
}
#toasts .toast {
    background: var(--bg-3);
    border: 1px solid var(--line-2);
    border-left: 3px solid var(--info);
    border-radius: var(--radius);
    padding: 10px 14px;
    font-size: 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.5);
    animation: slide-in 0.2s ease;
}
#toasts .toast.ok { border-left-color: var(--ok); }
#toasts .toast.err { border-left-color: var(--err); }
#toasts .toast.warn { border-left-color: var(--warn); }
@keyframes slide-in { from { transform: translateX(20px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* responsive */
@media (max-width: 900px) {
    .topbar nav a { padding: 6px 8px; font-size: 11px; }
    .topbar .brand .label { display: none; }
}