/*
    AI-CODING NOTE:
    Responsibility: Style the five-step Trace to Plug workflow and its preview.
    Inputs: Class and id hooks from index.html and the workflow controller.
    Outputs: Presentation only.
    Safe edits: Colour, spacing, typography and responsive behaviour.
    Do not: Hide a control the workflow depends on, or style a disabled control as available.
    Verification: test/workflow-browser-smoke.mjs
*/

:root {
    --bg: #10131a;
    --surface: #181c25;
    --surface-2: #1f2431;
    --line: #2c3342;
    --ink: #e8ecf4;
    --ink-dim: #9aa5b8;
    --accent: #4fd1a5;
    --accent-ink: #05231a;
    --warn: #ffd166;
    --error: #ff6b6b;
    --radius: 10px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

h1 { font-size: 1.25rem; margin: 0; }
h2 { font-size: 1.05rem; margin: 0 0 0.35rem; }
h3 { font-size: 0.95rem; margin: 1.5rem 0 0.5rem; color: var(--ink-dim); text-transform: uppercase; letter-spacing: 0.04em; }
code { background: var(--surface-2); padding: 0.1em 0.35em; border-radius: 4px; font-size: 0.9em; }

/* ---- masthead ---- */

.masthead {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.85rem 1.25rem;
    border-bottom: 1px solid var(--line);
    background: var(--surface);
}

.brand { display: flex; align-items: center; gap: 0.75rem; }
.brand-mark { font-size: 1.7rem; }
.brand p { margin: 0; color: var(--ink-dim); font-size: 0.85rem; }

/* ---- stepper ---- */

.stepper {
    display: flex;
    gap: 0.4rem;
    padding: 0.75rem 1.25rem 0;
    flex-wrap: wrap;
}

.step {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--surface);
    color: var(--ink-dim);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 0.5rem 0.9rem;
    font: inherit;
    cursor: pointer;
}

.step span {
    display: grid;
    place-items: center;
    width: 1.4rem;
    height: 1.4rem;
    border-radius: 50%;
    background: var(--surface-2);
    font-size: 0.8rem;
}

.step.is-done { color: var(--ink); border-color: #35506a; }
.step.is-done span { background: #2b4b63; color: var(--ink); }
.step.is-active { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); }
.step.is-active span { background: rgba(0, 0, 0, 0.2); color: var(--accent-ink); }
.step:disabled { opacity: 0.4; cursor: not-allowed; }

/* ---- status ---- */

.status {
    margin: 0.75rem 1.25rem 0;
    padding: 0.55rem 0.85rem;
    border-radius: var(--radius);
    border-left: 3px solid var(--line);
    background: var(--surface);
    font-size: 0.9rem;
}

.status-ok { border-left-color: var(--accent); }
.status-warn { border-left-color: var(--warn); }
.status-error { border-left-color: var(--error); }
.status-busy { border-left-color: #6aa9ff; }

/* ---- layout ---- */

.workspace {
    display: grid;
    grid-template-columns: minmax(340px, 460px) 1fr;
    gap: 1rem;
    padding: 1rem 1.25rem 2rem;
    align-items: start;
}

@media (max-width: 900px) {
    .workspace { grid-template-columns: 1fr; }
    .viewport { height: 46vh; }
}

.panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1.1rem 1.15rem;
}

.lede { color: var(--ink-dim); margin: 0 0 1rem; }
.note { color: var(--ink-dim); font-size: 0.85rem; border-left: 2px solid var(--line); padding-left: 0.7rem; margin: 1rem 0 0; }

/* ---- import ---- */

.dropzone {
    border: 1.5px dashed var(--line);
    border-radius: var(--radius);
    padding: 1.6rem 1rem;
    text-align: center;
    background: var(--surface-2);
}

.dropzone.is-hot { border-color: var(--accent); background: #16302a; }
.dropzone p { margin: 0 0 0.6rem; color: var(--ink-dim); }
.filepick input { display: block; margin: 0 auto 0.4rem; color: var(--ink-dim); max-width: 100%; }
.filepick span { color: var(--ink-dim); font-size: 0.85rem; }

/* ---- controls ---- */

.control { display: block; margin: 0 0 1rem; }
.control-inline { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.control-label { display: block; font-weight: 600; margin-bottom: 0.3rem; }
.control-inline .control-label { margin-bottom: 0; font-weight: 500; }
.hint { display: block; color: var(--ink-dim); font-size: 0.83rem; margin-top: 0.25rem; }

input[type="range"] { width: 100%; accent-color: var(--accent); }
input[type="checkbox"] { accent-color: var(--accent); width: 1.05rem; height: 1.05rem; }

input[type="number"], input[type="text"], select, textarea {
    background: var(--surface-2);
    color: var(--ink);
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 0.4rem 0.55rem;
    font: inherit;
}

input[type="text"], textarea { width: 100%; }
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.82rem; resize: vertical; }
output { color: var(--accent); font-variant-numeric: tabular-nums; }

.subcontrols {
    border-left: 2px solid var(--line);
    padding-left: 0.9rem;
    margin: 0.6rem 0 1rem;
}

button {
    font: inherit;
    border-radius: 7px;
    padding: 0.5rem 0.95rem;
    cursor: pointer;
    border: 1px solid var(--line);
}

.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.ghost { background: var(--surface-2); color: var(--ink); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

/* ---- readouts ---- */

.readout {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.3rem 0.9rem;
    margin: 1rem 0 0;
    padding: 0.75rem 0.85rem;
    background: var(--surface-2);
    border-radius: var(--radius);
    font-size: 0.9rem;
}

.readout dt { color: var(--ink-dim); }
.readout dd { margin: 0; font-variant-numeric: tabular-nums; }

.afterwards { color: var(--ink-dim); padding-left: 1.2rem; margin: 0; }
.afterwards li { margin-bottom: 0.4rem; }

/* ---- preview ---- */

.preview { position: sticky; top: 1rem; }

.viewport {
    height: min(72vh, 720px);
    background: #14171c;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
}

.viewport canvas { display: block; width: 100%; height: 100%; }

.viewbar { display: flex; gap: 0.4rem; margin-top: 0.5rem; }
.viewbar button { background: var(--surface); color: var(--ink-dim); }

/* ---- AI modal ---- */

.modal {
    background: var(--surface);
    color: var(--ink);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    max-width: 720px;
    width: calc(100% - 2rem);
    padding: 1.3rem;
}

.modal::backdrop { background: rgba(4, 6, 10, 0.72); }
.modal-actions { display: flex; gap: 0.5rem; margin-top: 0.9rem; }

.diagnostics:empty { display: none; }

.diagnostics {
    background: #2a1a1c;
    border-left: 3px solid var(--error);
    border-radius: 6px;
    padding: 0.6rem 0.85rem;
    font-size: 0.86rem;
}

.ai-refused { margin: 0 0 0.4rem; font-weight: 600; color: var(--error); }
.diagnostics ul { margin: 0; padding-left: 1.1rem; }
.diagnostics li { margin-bottom: 0.25rem; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.8rem; }