/* ──────────────────────────────────────────────────────────────
   Notum AHI Sub-page Layout — Shared CSS
   Copyright © 2026 Notum Robotics. Licensed under the MIT License.

   Common layout styles used by dynamic.html, interactive.html,
   ahi.html, and any future sub-page that renders a viewport-
   filling grid layout with header + container + footer.

   USAGE:
     <link rel="stylesheet" href="css/subpage.css">
     <div class="subpage-app">   (flex column, 100dvh)
       <header>…</header>
       <div class="nd-grid">…</div>   (flex:1 container)
       <div class="subpage-footer">…</div>
     </div>
   ────────────────────────────────────────────────────────────── */

/* ═══════════════════════════════════
   Viewport Lock
   ═══════════════════════════════════ */

html, body {
    overflow: hidden;
    height: 100%;
    margin: 0;
    padding: 0;
}

/* ═══════════════════════════════════
   App Shell — Full-viewport flex column
   ═══════════════════════════════════ */

.subpage-app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
}

.subpage-app header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: baseline;
    padding: calc(1rem + env(safe-area-inset-top, 0px)) 16px .5rem;
    flex-shrink: 0;
    column-gap: 1rem;
}

.header-subtitle {
    width: 100%;
    font-size: .65rem;
    letter-spacing: .25em;
    color: rgba(0,229,255, 0.3);
    margin-top: -.15rem;
    margin-bottom: .15rem;
}

/* ═══════════════════════════════════
   Header Meta Links
   ═══════════════════════════════════ */

.header-meta a {
    color: rgba(0,229,255, 0.35);
    text-decoration: none;
}
.header-meta a:hover {
    color: rgba(0,229,255, 0.6);
}

/* ═══════════════════════════════════
   Grid Container
   ═══════════════════════════════════ */

.nd-grid {
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

/* ═══════════════════════════════════
   Grid Cell Overrides
   Baseline styles for nDynamic-rendered controls
   inside the viewport-filling container.
   ═══════════════════════════════════ */

.nd-grid .grid-cell {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    position: relative;
    padding: 10px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.nd-grid .grid-cell.gc-slider {
    justify-content: center;
    gap: 6px;
}

.nd-grid .grid-cell.gc-toggle {
    justify-content: center;
    gap: 2px;
    padding: 6px 10px;
}

.nd-grid .grid-cell.gc-toggle .panel-label {
    font-size: .55rem;
    line-height: 1;
}

.nd-grid .grid-cell.gc-toggle .tg-option {
    padding: 4px 0;
    font-size: .7rem;
}

.nd-grid .grid-cell.gc-stepper {
    justify-content: center;
    gap: 4px;
}

.nd-grid .grid-cell.gc-bar {
    justify-content: center;
    gap: 4px;
}

.nd-grid .grid-cell.gc-status {
    gap: 3px;
}

.nd-grid .action-btn {
    display: flex;
}

.nd-grid .card {
    flex: none;
    min-width: 0;
}

/* ═══════════════════════════════════
   Footer Bar
   ═══════════════════════════════════ */

.subpage-footer {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .4rem 16px calc(.4rem + env(safe-area-inset-bottom, 0px));
    border-top: 1px solid var(--border);
}

.subpage-footer .footer-info {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .55rem;
    color: var(--text-dim);
    letter-spacing: .06em;
}

.subpage-footer .footer-info span {
    color: var(--accent);
}

/* ═══════════════════════════════════
   Footer Actions & Buttons
   ═══════════════════════════════════ */

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

.footer-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 4px 10px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: .6rem;
    letter-spacing: .06em;
    color: var(--text-dim);
    cursor: pointer;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 4px;
}

.footer-btn:hover {
    color: var(--text);
    border-color: rgba(244,244,244, 0.20);
}

.footer-btn.active {
    color: var(--accent);
    border-color: rgba(0,229,255, 0.30);
}