/* rift-bifrost-demo · mobile-first
 *
 * Tokens / structure cribbed from grim-gambit (refresh-point + tome-queue):
 * solid surfaces, no glassy alpha, sticky header, container max-width 1200,
 * dvh + safe-area, dialog-style cards. Purple swap for grim's gold.
 */

:root {
  --bg:            #06070a;
  --surface:       #111118;
  --surface-2:     #16161e;
  --surface-3:     #1c1c25;
  --border:        #1f1f29;
  --border-accent: #2a2a36;

  --ink:           #e9e6ed;
  --ink-mute:      #8a8595;
  --ink-faint:     #5a5663;

  --accent:        #b558d8;
  --accent-bright: #d8b4fe;
  --accent-dim:    #7a18a0;
  --accent-deep:   #4d0861;

  --ok:            #5fd58a;
  --warn:          #f0c05a;
  --err:           #ff6f7a;

  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 18px;
  --r-pill: 999px;

  --gap-1: 4px;
  --gap-2: 8px;
  --gap-3: 12px;
  --gap-4: 16px;
  --gap-5: 20px;
  --gap-6: 24px;
  --gap-8: 32px;

  --t-xs: 11px;
  --t-sm: 13px;
  --t-md: 15px;
  --t-lg: 18px;
  --t-xl: 22px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --d-fast: 200ms;
  --d:      450ms;
  --d-slow: 700ms;

  --font-body: -apple-system, BlinkMacSystemFont, "Inter", system-ui, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, monospace;

  --pad-page: 16px;
  --header-h: 48px;
}

@media (min-width: 768px) {
  :root { --pad-page: 24px; --header-h: 52px; }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--t-md);
  line-height: 1.5;
  min-height: 100dvh;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-bright); }

button { font: inherit; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-thumb { background: var(--border-accent); border-radius: 3px; }
::-webkit-scrollbar-track { background: transparent; }

.muted {
  color: var(--ink-mute);
  font-size: var(--t-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-family: var(--font-mono);
}

/* ─────────────────────────────────────────────────────────── header */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: env(safe-area-inset-top, 0px) var(--pad-page) 0;
}

.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--gap-3);
  height: var(--header-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--gap-2);
  min-width: 0;
  flex: 1;
  color: var(--ink);
  text-decoration: none;
  overflow: hidden;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: var(--r-sm);
  display: block;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 8px rgba(122, 24, 160, 0.45));
}

.brand-name {
  font-size: var(--t-md);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.brand-sub {
  font-size: 10px;
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding-left: var(--gap-2);
  border-left: 1px solid var(--border);
  margin-left: var(--gap-1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (max-width: 419px) {
  .brand-sub { display: none; }
}

.controls {
  display: flex;
  align-items: center;
  gap: var(--gap-2);
  flex-shrink: 0;
}

.btn {
  appearance: none;
  border: 1px solid var(--border-accent);
  background: var(--surface-2);
  color: var(--ink);
  padding: 6px var(--gap-3);
  font-family: var(--font-body);
  font-size: var(--t-sm);
  border-radius: var(--r-pill);
  cursor: pointer;
  height: 32px;
  -webkit-tap-highlight-color: transparent;
  transition: background var(--d-fast) var(--ease),
              border-color var(--d-fast) var(--ease),
              transform 100ms ease-out;
}

.btn:hover { border-color: var(--accent); }
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--ink);
}

.btn-primary:hover { background: var(--accent); }

.clock {
  position: relative;
  appearance: none;
  background: var(--surface-2);
  border: 1px solid var(--border-accent);
  border-radius: var(--r-pill);
  padding: 0 var(--gap-3);
  height: 32px;
  display: inline-flex;
  align-items: center;
  gap: var(--gap-2);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: border-color var(--d-fast) var(--ease),
              background var(--d-fast) var(--ease);
}

.clock:hover { border-color: var(--accent); }
.clock:active { transform: scale(0.97); }

.clock-time {
  font-family: var(--font-mono);
  font-size: var(--t-sm);
  color: var(--ink-mute);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.clock.running .clock-time { color: var(--ink); }
.clock.done    .clock-time { color: var(--ok); }

.clock-pause {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  color: var(--accent-bright);
  border-radius: var(--r-pill);
  background: rgba(122, 24, 160, 0.25);
  pointer-events: none;
  animation: pause-glow 1.6s var(--ease) infinite;
}

.clock.paused .clock-pause { display: flex; }
.clock.paused .clock-time  { opacity: 0.25; }

/* Viewport-pause: clock freezes silently while waiting for a stage to scroll
 * into view. No glow — that's reserved for explicit user pause. */
.clock.paused-viewport .clock-time {
  color: var(--ink-faint);
  opacity: 0.7;
}

@keyframes pause-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(181, 88, 216, 0.55); }
  50%      { box-shadow: 0 0 0 8px rgba(181, 88, 216, 0); }
}

/* ─────────────────────────────────────────────────────────── layout */

.layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--pad-page);
  padding-bottom: calc(env(safe-area-inset-bottom, 0px) + 32px);
  display: flex;
  flex-direction: column;
  gap: var(--gap-5);
}

@media (min-width: 1024px) {
  .layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: var(--gap-6);
    align-items: start;
  }
}

/* ─────────────────────────────────────────────────────────── pipeline */

.pipeline {
  display: flex;
  flex-direction: column;
  gap: var(--gap-3);
  min-width: 0;
}

.stage {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--gap-4);
  opacity: 0.55;
  transition:
    opacity var(--d) var(--ease),
    border-color var(--d) var(--ease),
    box-shadow var(--d) var(--ease),
    background var(--d) var(--ease);
}

.stage.active {
  opacity: 1;
  background: var(--surface-2);
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(181, 88, 216, 0.4),
              0 12px 40px rgba(122, 24, 160, 0.18);
}

.stage.complete {
  opacity: 0.95;
  border-color: rgba(95, 213, 138, 0.4);
}

.stage-head {
  display: flex;
  align-items: center;
  gap: var(--gap-3);
  margin-bottom: var(--gap-3);
  flex-wrap: wrap;
}

.stage-num {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  color: var(--ink-faint);
  letter-spacing: 0.1em;
}

.stage-label {
  font-size: var(--t-md);
  font-weight: 600;
  flex: 1;
  min-width: 0;
}

@media (min-width: 768px) {
  .stage-label { font-size: var(--t-lg); }
}

.stage-status {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 4px var(--gap-2);
  border-radius: var(--r-pill);
  background: var(--surface-3);
  white-space: nowrap;
}

.stage.active .stage-status { background: var(--accent-dim); color: var(--ink); }
.stage.complete .stage-status { background: rgba(95, 213, 138, 0.18); color: var(--ok); }

.stage-body {
  display: flex;
  flex-direction: column;
  gap: var(--gap-3);
}

.kv {
  display: grid;
  grid-template-columns: minmax(80px, max-content) 1fr;
  gap: var(--gap-1) var(--gap-3);
  font-family: var(--font-mono);
  font-size: var(--t-sm);
  align-items: baseline;
  word-break: break-word;
}

.kv .k {
  color: var(--ink-mute);
  font-size: var(--t-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.kv .v {
  color: var(--ink);
  overflow-wrap: anywhere;
}

/* ─────────────────────────────────────────────────────────── connector */

.connector {
  width: 2px;
  height: 18px;
  background: linear-gradient(180deg, var(--border-accent), transparent);
  margin: -6px auto;
  position: relative;
}

.connector::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  transform: translate(-50%, -50%) scale(0.6);
  opacity: 0;
  transition: opacity var(--d-fast) var(--ease);
}

.connector.active::after {
  opacity: 1;
  animation: pulse-dot 1.4s var(--ease) infinite;
}

@keyframes pulse-dot {
  0%, 100% {
    transform: translate(-50%, -50%) scale(0.7);
    box-shadow: 0 0 0 0 rgba(181, 88, 216, 0.55);
  }
  50% {
    transform: translate(-50%, -50%) scale(1.3);
    box-shadow: 0 0 0 10px rgba(181, 88, 216, 0);
  }
}

/* ─────────────────────────────────────────────────────────── decompose */

.dag {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-2);
}

.dag-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--gap-3);
  background: var(--surface-3);
  border-radius: var(--r-md);
  min-width: 0;
}

.dag-stat .v {
  font-family: var(--font-mono);
  font-size: var(--t-md);
  color: var(--ink);
}

.dag-branches {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-2);
}

.dag-node {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  padding: 6px var(--gap-3);
  border-radius: var(--r-sm);
  background: var(--surface-3);
  border: 1px solid var(--border);
  color: var(--ink);
  opacity: 0;
  animation: fade-in 220ms var(--ease) forwards;
  white-space: nowrap;
}

.dag-node.done {
  background: rgba(95, 213, 138, 0.1);
  border-color: rgba(95, 213, 138, 0.4);
  color: var(--ok);
}

@keyframes fade-in {
  to { opacity: 1; }
}

/* ─────────────────────────────────────────────────────────── arms */

.route-decision {
  display: grid;
  gap: var(--gap-2);
  padding: var(--gap-3);
  background: var(--surface-3);
  border-radius: var(--r-md);
  border: 1px solid var(--border);
}

.route-row {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: var(--gap-3);
  align-items: baseline;
  font-family: var(--font-mono);
  font-size: var(--t-sm);
  word-break: break-word;
}

.route-row .muted { margin: 0; line-height: 1.4; }
.route-row .v    { color: var(--ink); overflow-wrap: anywhere; }

.arms-label, .exec-label {
  margin: 0;
  font-size: 10px;
  letter-spacing: 0.14em;
}

.arms-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-2);
}

@media (min-width: 480px) {
  .arms-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 768px) {
  .arms-row { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.arm {
  display: grid;
  grid-template-rows: auto auto auto;
  gap: 6px;
  padding: var(--gap-3);
  border-radius: var(--r-md);
  background: var(--surface-3);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  min-width: 0;
  transition:
    background var(--d) var(--ease),
    border-color var(--d) var(--ease),
    opacity var(--d) var(--ease);
}

.arm-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--gap-2);
  min-width: 0;
}

.arm-name {
  font-weight: 600;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
  flex: 1;
}

.arm-tier {
  font-size: 9px;
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  white-space: nowrap;
  flex-shrink: 0;
}

.arm.selected {
  background: rgba(122, 24, 160, 0.22);
  border-color: var(--accent);
}

.arm.selected .arm-name { color: var(--accent-bright); }

/* After scoring, dim every arm and drop the highlight so the visual no
 * longer implies the bandit's selection alone determined the reward —
 * the reward is composite (cost + quality + SWU + cache stack). */
.arms-row.scored .arm,
.arms-row.scored .arm.selected {
  opacity: 0.45;
  background: var(--surface-3);
  border-color: var(--border);
}
.arms-row.scored .arm.selected .arm-name { color: var(--ink); }

.ucb-bar {
  height: 3px;
  background: var(--bg);
  border-radius: var(--r-pill);
  overflow: hidden;
}

.ucb-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-deep), var(--accent-bright));
  border-radius: var(--r-pill);
  transition: width var(--d-slow) var(--ease);
}

.arm-foot {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--gap-2);
  font-size: 10px;
  color: var(--ink-mute);
  align-items: baseline;
  min-width: 0;
}

.arm-foot > span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.arm-cost {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-mute);
  letter-spacing: -0.01em;
}
.arm-cost.expensive { color: var(--err); }
.arm-cost.cheap     { color: var(--ok); }
.arm.selected .arm-cost { color: var(--accent-bright); }

.exec-log {
  display: flex;
  flex-direction: column;
  gap: var(--gap-1);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  border-top: 1px dashed var(--border);
  padding-top: var(--gap-3);
  max-height: 180px;
  overflow-y: auto;
}

.exec-line {
  display: grid;
  grid-template-columns: 18px 1fr auto;
  gap: var(--gap-2);
  align-items: center;
  padding: 4px 0;
  opacity: 0;
  animation: fade-in 220ms var(--ease) forwards;
}

.exec-line .ok { color: var(--ok); }
.exec-line .name { color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.exec-line .meta { color: var(--ink-mute); white-space: nowrap; font-size: 10px; }

.lane-pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 9px;
  padding: 2px 6px;
  border-radius: var(--r-pill);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-left: 4px;
  vertical-align: middle;
}
.lane-pill.batch { background: rgba(95, 213, 138, 0.15); color: var(--ok); }
.lane-pill.live  { background: rgba(240, 192, 90, 0.15); color: var(--warn); }

/* ─────────────────────────────────────────────────────────── reward */

.reward-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-2);
}

@media (min-width: 540px) {
  .reward-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.reward-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--gap-3);
  background: var(--surface-3);
  border-radius: var(--r-md);
  min-width: 0;
}

.reward-cell .v {
  font-family: var(--font-mono);
  font-size: var(--t-md);
  color: var(--ink);
}

.reward-cell.wide {
  grid-column: 1 / -1;
}

.savings-bar {
  height: 8px;
  background: var(--bg);
  border-radius: var(--r-pill);
  overflow: hidden;
  margin-top: 6px;
}

.savings-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-deep), var(--ok));
  transition: width var(--d-slow) var(--ease);
}

.swu.success { color: var(--ok); }
.swu.escalated { color: var(--warn); }

.stack-strip {
  display: flex;
  gap: var(--gap-2);
  flex-wrap: wrap;
}

.stack-chip {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 4px var(--gap-2);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  border: 1px solid var(--border-accent);
  color: var(--ink-mute);
}
.stack-chip.own      { color: var(--accent-bright); border-color: var(--accent-dim); }
.stack-chip.provider { color: var(--warn); border-color: rgba(240, 192, 90, 0.35); }
.stack-chip.batch    { color: var(--ok);  border-color: rgba(95, 213, 138, 0.35); }

/* ─────────────────────────────────────────────────────────── sidecar */

.sidecar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--gap-4);
  display: flex;
  flex-direction: column;
  gap: var(--gap-3);
  min-width: 0;
  min-height: 0;
}

@media (max-width: 1023px) {
  /* On mobile the sidecar starts pinned to the viewport bottom as a small
   * peek panel. It begins growing only once stage 05's bottom enters the
   * viewport, with the title fading in alongside the growth. Once the
   * sidecar's natural document slot scrolls into view, JS swaps the panel
   * from fixed → static so it slides into place without leaving black
   * space behind it. A spacer reserves the matching height in flow. */
  .sidecar.pinned-bottom {
    position: fixed;
    left: var(--pad-page);
    right: var(--pad-page);
    bottom: 0;
    z-index: 40;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    border-bottom: 0;
    box-shadow: 0 -16px 40px rgba(0, 0, 0, 0.55),
                0 -1px 0 var(--border);
    padding-bottom: calc(env(safe-area-inset-bottom, 0px) + var(--gap-3));
    will-change: height;
  }
  .sidecar.pinned-bottom .sidecar-head {
    position: relative;
    opacity: var(--title-opacity, 0);
    transition: opacity 180ms linear;
  }
  /* Drag-style handle hint at the top edge — visible whenever pinned. */
  .sidecar.pinned-bottom::before {
    content: "";
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 36px;
    height: 4px;
    border-radius: var(--r-pill);
    background: var(--border-accent);
    z-index: 1;
    pointer-events: none;
  }
  /* Spacer that holds the sidecar's place in document flow while pinned. */
  .sidecar-spacer {
    width: 100%;
    pointer-events: none;
  }
}

@media (min-width: 1024px) {
  .sidecar {
    position: sticky;
    top: calc(var(--header-h) + 16px);
    height: calc(100dvh - var(--header-h) - 32px);
    overflow: hidden;
  }
}

.sidecar-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--gap-2);
}

.sidecar-title {
  font-size: var(--t-md);
  font-weight: 600;
}

.event-list {
  list-style: none;
  /* Pinned mobile sidecar gets a fixed height — event-list fills it. */
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  display: flex;
  flex-direction: column;
  gap: var(--gap-2);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  padding-right: 4px;
}

.event-list li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: var(--gap-3);
  padding: var(--gap-2) var(--gap-3);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  border-left: 3px solid var(--accent);
  opacity: 0;
  animation: fade-in 220ms var(--ease) forwards;
  min-width: 0;
}

.event-list li .ev-ts {
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
}

.event-list li .ev-body {
  color: var(--ink);
  overflow-wrap: anywhere;
}

.event-list li[data-event="reward"]   { border-left-color: var(--warn); }
.event-list li[data-event="complete"] { border-left-color: var(--ok); }
.event-list li[data-event="execute"]  { border-left-color: var(--accent-bright); }

/* ─────────────────────────────────────────────────────────── footer */

.footer {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--gap-1);
  padding: var(--gap-5) var(--pad-page);
  padding-bottom: calc(env(safe-area-inset-bottom, 0px) + 20px);
  border-top: 1px solid var(--border);
  font-size: var(--t-xs);
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-family: var(--font-mono);
}

@media (min-width: 768px) {
  .footer { flex-direction: row; justify-content: space-between; }
}

/* ─────────────────────────────────────────────────────────── update toast */

.update-toast {
  position: fixed;
  bottom: calc(env(safe-area-inset-bottom, 0px) + 16px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--surface-2);
  border: 1px solid var(--accent);
  color: var(--accent-bright);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 10px var(--gap-5);
  border-radius: var(--r-pill);
  box-shadow: 0 12px 40px rgba(122, 24, 160, 0.4);
  z-index: 1000;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--d) var(--ease), transform var(--d) var(--ease);
  max-width: calc(100vw - 32px);
  text-align: center;
}

.update-toast.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0ms !important;
    transition-duration: 100ms !important;
  }
}