/* Control Loops — shared walk chrome (Part 3 gold).
   Quiet page, compact header, left clickable walk, viewport-fill lab. */

body.cl-page {
    background-color: #eef1f4;
    background-image: none;
    min-height: 100dvh;
}

body.cl-page .ai-header {
    margin: 0;
    border-radius: 0;
    padding: 8px 18px;
    flex-shrink: 0;
}

body.cl-page .control-loops-series-nav--top {
    margin: 0;
    padding: 4px 16px 2px;
    max-width: none;
    flex-shrink: 0;
}

body.cl-page .control-loops-series-nav--top .series-progress,
body.cl-page .control-loops-series-nav--top .series-nav-tagline {
    display: none;
}

body.cl-page .control-loops-series-nav--top .series-nav-inner {
    padding: 6px 10px;
}

body.cl-page .control-loops-series-nav--top .series-nav-btn {
    min-height: 42px;
    padding: 6px 10px;
}

body.cl-page .ai-site-footer {
    margin-top: 1.25rem;
}

.cl-workspace {
    display: grid;
    grid-template-columns: minmax(280px, 320px) minmax(0, 1fr);
    gap: 16px 18px;
    align-items: start;
    width: 100%;
    max-width: 2200px;
    margin: 0 auto;
    padding: 10px 16px 16px;
    min-width: 0;
}

.cl-walk {
    position: sticky;
    top: 8px;
    background: #fff;
    border: 1px solid var(--ai-gray-200);
    border-radius: var(--ai-radius-lg);
    box-shadow: var(--ai-shadow-sm);
    padding: 12px 12px 14px;
    min-width: 0;
    max-height: calc(100dvh - 16px);
    overflow-y: auto;
}

.cl-walk .mt-part-label { margin: 0 0 2px; }

.cl-walk h2 {
    margin: 0 0 8px;
    font-size: 1.15rem;
    color: var(--ai-blue-800);
}

.walk-key {
    margin: 0 0 10px;
    font-size: 0.8rem;
    line-height: 1.45;
    color: var(--ai-gray-700);
}

.walk-hint {
    margin: 0 0 8px;
    font-size: 0.72rem;
    color: var(--ai-gray-500);
    line-height: 1.35;
}

.walk-nav {
    display: flex;
    gap: 8px;
    margin: 0 0 8px;
}

.walk-nav button {
    flex: 1 1 auto;
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--ai-blue-800);
    background: #fff;
    border: 1px solid #93c5fd;
    border-radius: 6px;
    padding: 6px 8px;
    cursor: pointer;
}

.walk-nav button:hover:not(:disabled) { background: #eff6ff; }

.walk-nav button:disabled {
    opacity: 0.4;
    cursor: default;
    border-color: var(--ai-gray-200);
}

.walk-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.walk-step {
    display: grid;
    grid-template-columns: 24px 1fr;
    gap: 8px;
    align-items: start;
    padding: 8px 9px;
    background: #f8fafc;
    border: 1px solid var(--ai-gray-200);
    border-radius: 6px;
    font-size: 0.78rem;
    line-height: 1.4;
    color: var(--ai-gray-700);
    cursor: pointer;
}

.walk-step:hover { border-color: #93c5fd; }

.walk-step.is-on {
    border-color: #3b82f6;
    background: #eff6ff;
}

.walk-step:focus-visible {
    outline: 2px solid #2563eb;
    outline-offset: 1px;
}

.walk-n {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: #dbeafe;
    color: #1d4ed8;
    font-size: 0.72rem;
    font-weight: 700;
}

.walk-step.is-on .walk-n {
    background: #1d4ed8;
    color: #fff;
}

.walk-step strong {
    display: block;
    color: var(--ai-blue-800);
    font-size: 0.8rem;
    margin-bottom: 2px;
}

.walk-step p {
    margin: 0;
    display: none;
}

.walk-step.is-on p { display: block; }

.walk-try {
    margin-top: 7px;
    font-family: inherit;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--ai-blue-800);
    background: #fff;
    border: 1px solid #93c5fd;
    border-radius: 999px;
    padding: 3px 10px;
    cursor: pointer;
    display: none;
}

.walk-step.is-on .walk-try { display: inline-block; }

.walk-try:hover { background: #dbeafe; }

.walk-reset {
    display: block;
    width: 100%;
    margin: 10px 0 0;
    font-family: inherit;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--ai-gray-600);
    background: #fff;
    border: 1px dashed var(--ai-gray-200);
    border-radius: 6px;
    padding: 7px 10px;
    cursor: pointer;
}

.walk-reset:hover {
    color: var(--ai-blue-800);
    border-color: #93c5fd;
    background: #f8fafc;
}

.walk-aside {
    margin: 12px 0 0;
    padding: 8px 10px;
    background: #fffbeb;
    border-left: 3px solid #f59e0b;
    border-radius: 4px;
    font-size: 0.75rem;
    line-height: 1.4;
    color: #78350f;
}

.cl-workspace .mt-lesson-lab,
.cl-workspace .cl-lab {
    min-width: 0;
}

.cl-panel {
    margin-bottom: 0;
    padding: 14px 16px 16px;
    background: var(--ai-bg-card, #fff);
    border: 1px solid var(--ai-gray-200);
    border-radius: var(--ai-radius-lg);
    box-shadow: var(--ai-shadow-sm);
}

.cl-panel .mt-panel-head {
    margin-bottom: 8px;
    align-items: center;
    flex-shrink: 0;
}

.cl-deeper-wrap {
    max-width: 2200px;
    margin: 0 auto 24px;
    padding: 0 16px;
}

.cl-deeper {
    background: var(--ai-bg-card, #fff);
    border: 1px solid var(--ai-gray-200);
    border-radius: var(--ai-radius-lg);
    padding: 12px 16px 16px;
}

.cl-deeper summary {
    cursor: pointer;
    font-weight: 700;
    color: var(--ai-blue-800);
    font-size: 0.95rem;
}

.cl-deeper[open] summary { margin-bottom: 10px; }

@media (max-width: 1100px) {
    .cl-workspace { grid-template-columns: 1fr; }
    .cl-walk { position: static; max-height: none; }
}