/* ===================================================================
   BCI Memory R/W — Responsive overrides
   Shared across index.html, simulations/flow.html, simulations/brain.html
   =================================================================== */

/* ========= GLOBAL TYPE + PADDING SHRINK ========= */
@media (max-width: 900px){
  body { font-size: 13px; }
  .wrap { padding: 0 var(--s-4) !important; }
  h1, .serif[style*="clamp"] { letter-spacing: -0.015em; }
  /* Horizontal scroll fallback for anything that refuses */
  body { overflow-x: hidden; }
}

/* Sim pages lock html/body to 100vh + overflow hidden on desktop —
   on mobile we must release that so stacked content can scroll. */
@media (max-width: 900px){
  body[data-sim] { height: auto !important; overflow: auto !important; }
  body[data-sim] html,
  html:has(body[data-sim]) { height: auto !important; overflow: auto !important; }
  body[data-sim] main { height: auto !important; }
}

/* Landing: ensure the oscillation / band table scrolls horizontally on mobile */
@media (max-width: 900px){
  .band-table,
  table.band-table,
  .wrap table {
    display: block !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch;
    max-width: 100%;
  }
}

/* =========================================================
   INDEX.HTML — LANDING
   ========================================================= */

/* Nav ---------------------------------------------------- */
@media (max-width: 900px){
  nav.top .inner {
    padding: 12px var(--s-4) !important;
    flex-wrap: wrap; gap: 10px;
  }
  nav.top ul { display: none !important; }
  nav.top .cta .pill.ghost { display: none !important; }
  nav.top .brand .logo { font-size: 16px !important; }
  nav.top .brand .tag { font-size: 9px !important; letter-spacing: 0.1em !important; }
}

/* Hero --------------------------------------------------- */
@media (max-width: 900px){
  .hero { padding: var(--s-6) 0 var(--s-6) !important; }
  .hero-grid { gap: var(--s-6) !important; }
  .hero h1 { font-size: clamp(36px, 9vw, 56px) !important; line-height: 1.05 !important; }
  .hero-meta {
    grid-template-columns: 1fr 1fr !important;
    gap: var(--s-4) var(--s-4) !important;
    padding: var(--s-4) 0 !important;
  }
  .hero .eyebrow { font-size: 10px !important; margin-bottom: var(--s-3) !important; }
  .hero-viz { aspect-ratio: 4/3 !important; }
}

/* Section chrome ---------------------------------------- */
@media (max-width: 900px){
  section { padding: var(--s-7) 0 !important; }
  .sec-head { margin-bottom: var(--s-5) !important; }
  .sec-title { font-size: clamp(26px, 6vw, 40px) !important; }
  .sec-label { font-size: 10px !important; }
}

/* Architecture rows (label / content / timescale) ------- */
@media (max-width: 900px){
  .stage-row {
    grid-template-columns: 1fr !important;
    gap: 0 !important;
  }
  .stage-label,
  .stage-content,
  .stage-timescale {
    border-right: 0 !important;
    padding: var(--s-4) !important;
  }
  .stage-label {
    border-bottom: 1px solid var(--line);
    flex-direction: row !important;
    gap: 12px; align-items: center !important;
  }
  .stage-label .num { font-size: 22px !important; }
  .stage-content {
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch;
    border-bottom: 1px solid var(--line);
  }
  .stage-content::-webkit-scrollbar { height: 4px; }
  .stage-timescale { padding: var(--s-3) var(--s-4) !important; }
  .arch { padding: var(--s-4) !important; }
  .arch-legend { gap: 12px !important; font-size: 9px !important; }
}

/* Pipeline + claims + hardware grids -------------------- */
@media (max-width: 700px){
  .pipeline { gap: var(--s-5) !important; }
  .stage-bar {
    grid-template-columns: 1fr !important;
    gap: 4px !important;
    padding: 10px 0 !important;
  }
  .stage-bar .bar-track { order: 3; grid-column: 1 / -1; }
  .claim { padding: var(--s-4) !important; gap: 10px !important; }
  .claim .cno { font-size: 10px !important; }
  .hw-tier { padding: var(--s-4) !important; }
  .hw-tier .spec { grid-template-columns: 1fr !important; gap: 4px 0 !important; }
  .hw-tier .spec > div:nth-child(odd) {
    font-family: var(--f-mono); font-size: 10px; color: var(--fg-3);
    letter-spacing: 0.1em; text-transform: uppercase;
    padding-top: 6px;
  }
}

/* CTA strip + footer ------------------------------------ */
@media (max-width: 700px){
  .cta-strip { margin-top: var(--s-5) !important; }
  .cta-card { padding: var(--s-5) !important; }
  footer .fgrid { grid-template-columns: 1fr 1fr !important; gap: var(--s-4) !important; }
  footer div[style*="justify-content: space-between"] {
    flex-direction: column !important; gap: 8px !important;
    align-items: flex-start !important; font-size: 11px !important;
  }
}

/* Index grid viz (the 32×32 sparse grid) ---------------- */
@media (max-width: 900px){
  div[style*="grid-template-columns: 1.2fr 1fr"] {
    grid-template-columns: 1fr !important;
  }
  #index-grid { grid-template-columns: repeat(24, 1fr) !important; }
}

/* 4-col risk matrix inlined ----------------------------- */
@media (max-width: 900px){
  div[style*="grid-template-columns: repeat(4, 1fr)"][style*="background: var(--line)"] {
    grid-template-columns: 1fr 1fr !important;
  }
}
@media (max-width: 500px){
  div[style*="grid-template-columns: repeat(4, 1fr)"][style*="background: var(--line)"] {
    grid-template-columns: 1fr !important;
  }
}

/* Tweaks panel ------------------------------------------ */
@media (max-width: 700px){
  #tweaks {
    right: 8px !important; bottom: 8px !important;
    left: 8px !important; width: auto !important; max-width: none !important;
    max-height: 60vh; overflow-y: auto;
  }
}

/* =========================================================
   SIMULATIONS — shared
   ========================================================= */

.mobile-only { display: none; }

/* Topbar collapsing */
@media (max-width: 900px){
  body[data-sim] .topbar,
  .topbar {
    flex-wrap: wrap; gap: 8px; padding: 10px 14px !important;
  }
  .topbar .brand .b1 { font-size: 15px !important; }
  .topbar .brand .b2 { font-size: 9px !important; letter-spacing: 0.08em !important; }
  .topbar nav { order: 3; width: 100%; justify-content: flex-start; gap: 12px; }
  .topbar nav a { font-size: 10px !important; }
  .topbar .modes button { padding: 6px 10px !important; font-size: 10px !important; }
  .topbar > div[style*="letter-spacing"] { display: none; }
}

/* =========================================================
   flow.html — 3-col shell → stacked tabs on mobile
   ========================================================= */
@media (max-width: 1100px){
  main { grid-template-columns: 220px 1fr 260px !important; }
}

@media (max-width: 900px){
  body[data-sim="flow"] main,
  body[data-sim="flow"] > main {
    display: grid !important;
    grid-template-columns: 1fr !important;
    grid-template-rows: auto auto auto !important;
    height: auto !important;
    min-height: 0 !important;
  }
  aside.left, aside.right {
    border-right: 0 !important;
    border-left: 0 !important;
    max-height: none;
    width: 100% !important;
    min-width: 0 !important;
  }
  aside.left {
    border-bottom: 1px solid var(--line);
    order: 1;
  }
  .canvas-wrap { order: 2; min-height: 62vw; height: 62vw; }
  aside.right {
    border-top: 1px solid var(--line);
    order: 3;
  }
  /* Mobile collapsers — click to expand */
  aside.left, aside.right { padding: 0 !important; }
  aside.left > *, aside.right > * {
    padding-left: 16px; padding-right: 16px;
  }
  aside.left > h6:first-child,
  aside.right > h6:first-child {
    padding-top: 14px;
  }
  /* Ensure the flow SVG fits */
  #flow-svg { height: 100%; }
  .phase-title { font-size: 20px !important; top: 10px !important; left: 12px !important; }
  .phase-title .mode { font-size: 9px !important; }
  .phase-desc {
    position: static !important; max-width: none !important;
    padding: 8px 12px !important; text-align: left !important;
    border-top: 1px solid var(--line); background: var(--bg-1);
  }
  .canvas-wrap { display: flex; flex-direction: column; }
  .canvas-wrap #flow-svg { flex: 1; min-height: 0; }
  .legend {
    position: static !important;
    flex-wrap: wrap; padding: 6px 12px; border-top: 1px solid var(--line);
    background: var(--bg-1); font-size: 8px !important;
  }
  .timeline {
    padding: 10px 14px !important; gap: 10px !important; flex-wrap: wrap;
  }
  .timeline .scrub { order: 3; flex-basis: 100%; }
  .timeline .mark { font-size: 8px !important; padding: 3px 4px !important; }
  .timeline .clock { font-size: 10px !important; width: auto !important; }
  .log { max-height: 180px !important; }
}

/* =========================================================
   brain.html — 2-col → stacked; region selector scroll
   ========================================================= */
@media (max-width: 1100px){
  body[data-sim="brain"] main,
  body[data-sim="brain"] > main {
    grid-template-columns: 1fr 1fr !important;
  }
}

@media (max-width: 900px){
  body[data-sim="brain"] main,
  body[data-sim="brain"] > main,
  html body[data-sim="brain"] main {
    display: grid !important;
    grid-template-columns: 1fr !important;
    grid-template-rows: auto auto !important;
    grid-auto-flow: row !important;
    height: auto !important;
    min-height: 0 !important;
  }
  body[data-sim="brain"] section.left,
  body[data-sim="brain"] section.right {
    width: 100% !important;
    min-width: 0 !important;
    max-width: 100% !important;
  }
  section.left, section.right {
    border-right: 0 !important; border-left: 0 !important;
  }
  section.left { border-bottom: 1px solid var(--line); }
  .stim-head { padding: 12px 16px !important; }
  .stim-head .title { font-size: 18px !important; }
  .stim-body {
    grid-template-columns: 1fr !important;
    padding: 14px 16px !important; gap: 14px !important;
  }
  .controls {
    grid-template-columns: 1fr !important; padding: 12px 16px !important;
    gap: 10px !important;
  }
  .tabs {
    overflow-x: auto; -webkit-overflow-scrolling: touch;
    white-space: nowrap; flex-wrap: nowrap;
  }
  .tabs button {
    flex-shrink: 0; padding: 10px 12px !important; font-size: 9px !important;
  }
  .tabs .rside { display: none; }
  .tab-body { padding: 12px 16px !important; }
  .ex-grid { grid-template-columns: 1fr 1fr !important; }
  .perf-grid { grid-template-columns: 1fr 1fr !important; }
  .multi-grid { grid-template-columns: 1fr 1fr !important; }

  .brain-head { padding: 12px 16px !important; flex-wrap: wrap; gap: 10px; }
  .brain-head .title { font-size: 18px !important; }
  .heat-strip { width: 110px !important; }
  .brain-head .heat-legend { font-size: 9px !important; }
  .brain-viewer { min-height: 70vw !important; padding: 8px; }
  #brain-svg { width: 100% !important; height: auto !important; max-height: 70vw; }
  .brain-controls {
    padding: 10px 12px !important;
    overflow-x: auto; -webkit-overflow-scrolling: touch;
    white-space: nowrap; flex-wrap: nowrap;
  }
  .bcbtn { flex-shrink: 0; font-size: 9px !important; padding: 5px 8px !important; }
  .readout {
    grid-template-columns: 1fr !important;
    gap: 10px !important; padding: 12px 16px !important;
  }
  .readout svg { width: 100%; height: 42px; }
}

@media (max-width: 500px){
  .ex-grid, .perf-grid, .multi-grid { grid-template-columns: 1fr !important; }
}

/* =========================================================
   Touch target polish
   ========================================================= */
@media (max-width: 900px) and (pointer: coarse) {
  button, .bcbtn, .ex-card, .modes button, .tabs button, .btn-run, .play, .nav {
    min-height: 40px;
  }
  select, input[type=range], input[type=text], textarea {
    min-height: 38px; font-size: 12px !important;
  }
}

/* Prevent any absolutely positioned debug overlays from overflowing */
@media (max-width: 900px){
  .canvas-hud { font-size: 9px !important; }
}