/* =========================================================
   WORDSTRIKE FLOW PHASE 7 — DEDICATED UI
   Interface architecture only. Quiet Signal remains the visual language.
   ========================================================= */

.flow-phase1-screen[data-flow-ui-phase7="true"] {
  --flow-ui-rule: rgb(241 239 232 / 12%);
  --flow-ui-rule-strong: rgb(241 239 232 / 24%);
  --flow-ui-selected: color-mix(in srgb, var(--flow-signal) 10%, transparent);
}

/* ---------- SETUP ---------- */

.flow-ready-screen[data-flow-ui-phase7="true"] .flow-phase1-shell {
  width: min(calc(100% - 48px), 1180px);
  grid-template-columns: minmax(0, 1fr) minmax(230px, 0.34fr);
  grid-template-areas:
    "back back"
    "kicker kicker"
    "title brief"
    "lead brief"
    "setup setup"
    "note note"
    "start start";
  column-gap: clamp(52px, 8vw, 118px);
  row-gap: 22px;
  align-content: start;
  padding-top: clamp(32px, 5vw, 64px);
  padding-bottom: clamp(36px, 6vw, 80px);
}

.flow-ready-screen[data-flow-ui-phase7="true"] .flow-setup {
  grid-area: setup;
}

.flow-ready-screen[data-flow-ui-phase7="true"] .flow-phase1-note {
  max-width: 78ch;
}

.flow-setup {
  display: grid;
  gap: 0;
  margin-top: clamp(10px, 2vw, 24px);
  border-top: 1px solid var(--flow-ui-rule-strong);
  border-bottom: 1px solid var(--flow-ui-rule-strong);
}

.flow-setup-heading,
.flow-setup-itinerary-heading {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
  color: var(--flow-ink-muted);
  font-family: var(--flow-data-face);
  font-size: 0.66rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.flow-setup-heading {
  padding: 14px 0 12px;
  border-bottom: 1px solid var(--flow-ui-rule);
}

.flow-setup-heading strong {
  color: var(--flow-ink-soft);
  font-weight: 600;
  letter-spacing: 0.08em;
}

.flow-choice-group {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: clamp(20px, 4vw, 54px);
  margin: 0;
  padding: 18px 0;
  border: 0;
  border-bottom: 1px solid var(--flow-ui-rule);
  min-width: 0;
}

.flow-choice-group legend {
  align-self: start;
  padding: 12px 0 0;
  color: var(--flow-ink-muted);
  font-family: var(--flow-data-face);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.flow-choice-row {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.flow-choice-row--length {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.flow-choice-row--categories {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.flow-choice-row--difficulty {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.flow-choice {
  position: relative;
  display: grid;
  gap: 5px;
  min-height: 54px;
  padding: 10px 12px 10px 14px;
  border: 0;
  border-left: 1px solid var(--flow-ui-rule-strong);
  border-radius: 0;
  background: transparent;
  color: var(--flow-ink-muted);
  text-align: left;
  cursor: pointer;
  transition:
    color 150ms ease,
    background-color 150ms ease,
    border-color 150ms ease;
}

.flow-choice::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: transparent;
  transition: background-color 150ms ease, box-shadow 150ms ease;
}

.flow-choice span {
  font-family: var(--flow-ui-face);
  font-size: 0.88rem;
  font-weight: 620;
  letter-spacing: 0.01em;
}

.flow-choice small {
  color: var(--flow-ink-muted);
  font-family: var(--flow-data-face);
  font-size: 0.62rem;
  line-height: 1.45;
}

.flow-choice:hover,
.flow-choice:focus-visible {
  border-left-color: var(--flow-line-strong);
  background: rgb(255 255 255 / 2.5%);
  color: var(--flow-ink);
  outline: none;
}

.flow-choice:focus-visible {
  box-shadow: inset 0 0 0 1px var(--flow-ui-rule-strong);
}

.flow-choice.is-selected {
  border-left-color: var(--flow-signal);
  background: var(--flow-ui-selected);
  color: var(--flow-ink);
}

.flow-choice.is-selected::before {
  background: var(--flow-signal);
  box-shadow: 0 0 14px var(--flow-signal-soft);
}

.flow-choice.is-selected small {
  color: var(--flow-ink-soft);
}

.flow-setup-itinerary {
  display: grid;
  gap: 16px;
  padding: 18px 0 20px;
}

.flow-setup-itinerary-heading small {
  color: var(--flow-ink-soft);
  letter-spacing: 0.08em;
}

/* ---------- CHAPTER / SESSION RAIL ---------- */

.flow-session-rail {
  display: grid;
  grid-template-columns: minmax(130px, 0.24fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
  padding: 13px 0 15px;
  border-top: 1px solid var(--flow-ui-rule);
  border-bottom: 1px solid var(--flow-ui-rule);
}

.flow-run-header + .flow-session-rail {
  margin-top: -20px;
}

.flow-session-rail-copy {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.flow-session-rail-copy span,
.flow-session-rail-copy small {
  color: var(--flow-ink-muted);
  font-family: var(--flow-data-face);
  font-size: 0.58rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.flow-session-rail-copy strong {
  overflow: hidden;
  color: var(--flow-ink-soft);
  font-family: var(--flow-ui-face);
  font-size: 0.83rem;
  font-weight: 620;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.flow-itinerary-track {
  position: relative;
  display: grid;
  grid-template-columns: repeat(var(--flow-step-count, 6), minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.flow-itinerary-track::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 8px;
  height: 1px;
  background: var(--flow-ui-rule-strong);
}

.flow-itinerary-step {
  position: relative;
  display: grid;
  gap: 8px;
  min-width: 0;
  padding-right: 10px;
  color: var(--flow-ink-muted);
}

.flow-itinerary-step::before {
  content: "";
  position: relative;
  z-index: 1;
  width: 7px;
  height: 7px;
  margin-top: 5px;
  border: 1px solid var(--flow-line-strong);
  border-radius: 50%;
  background: var(--flow-bg-deep);
}

.flow-itinerary-step[data-state="complete"]::before {
  border-color: var(--flow-signal);
  background: var(--flow-signal);
  box-shadow: 0 0 10px var(--flow-signal-soft);
}

.flow-itinerary-step[data-state="current"]::before {
  width: 9px;
  height: 9px;
  margin-top: 4px;
  border-color: var(--flow-signal);
  background: var(--flow-bg-deep);
  box-shadow: 0 0 12px var(--flow-signal-soft);
}

.flow-itinerary-index {
  color: inherit;
  font-family: var(--flow-data-face);
  font-size: 0.55rem;
  letter-spacing: 0.1em;
}

.flow-itinerary-name {
  overflow: hidden;
  color: inherit;
  font-family: var(--flow-ui-face);
  font-size: 0.66rem;
  font-weight: 560;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.flow-itinerary-step[data-state="complete"],
.flow-itinerary-step[data-state="current"] {
  color: var(--flow-ink-soft);
}

.flow-itinerary-step[data-state="current"] .flow-itinerary-name {
  color: var(--flow-ink);
  font-weight: 680;
}

.flow-itinerary-step[data-state="current"] .flow-itinerary-index {
  color: var(--flow-signal);
}

/* Quick uses three steps; let them breathe rather than occupy only half the rail. */
.flow-itinerary-step:first-child:nth-last-child(3),
.flow-itinerary-step:first-child:nth-last-child(3) ~ .flow-itinerary-step {
  /* selector intentionally only marks quick-run tracks */
}

.flow-itinerary-track:has(.flow-itinerary-step:first-child:nth-last-child(3)) {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.flow-itinerary-track:has(.flow-itinerary-step:first-child:nth-last-child(6)) {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.flow-run-screen[data-flow-ui-phase7="true"] .flow-chapter-strip[hidden] {
  display: none;
}

/* ---------- CHAPTER TRANSITION UI ---------- */

.flow-chapter-screen[data-flow-ui-phase7="true"] .flow-session-rail {
  grid-column: 1 / -1;
  align-self: start;
  margin-bottom: clamp(8px, 2vw, 24px);
}

.flow-chapter-screen[data-flow-ui-phase7="true"] .flow-chapter-transition {
  grid-template-areas:
    "rail rail"
    "index kicker"
    "index title"
    "index lead"
    "index brief"
    "index action"
    "index note";
}

.flow-chapter-screen[data-flow-ui-phase7="true"] .flow-session-rail { grid-area: rail; }

/* ---------- RESULTS UI ---------- */

.flow-complete-screen[data-flow-ui-phase7="true"] .flow-session-rail {
  margin: 4px 0 8px;
}

.flow-complete-screen[data-flow-ui-phase7="true"] .flow-itinerary-step[data-state="complete"] .flow-itinerary-name {
  color: var(--flow-ink-soft);
}

.flow-complete-screen[data-flow-ui-phase7="true"] .flow-complete-actions {
  align-items: stretch;
}

.flow-complete-screen[data-flow-ui-phase7="true"] [data-flow-ui-action="setup"] {
  border-color: var(--flow-line-strong);
}

/* ---------- RESPONSIVE ---------- */

@media (max-width: 900px) {
  .flow-ready-screen[data-flow-ui-phase7="true"] .flow-phase1-shell {
    grid-template-columns: 1fr;
    grid-template-areas:
      "back"
      "kicker"
      "title"
      "lead"
      "brief"
      "setup"
      "note"
      "start";
  }

  .flow-choice-group {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 22px;
  }

  .flow-choice-row--categories,
  .flow-choice-row--difficulty {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flow-session-rail {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .flow-session-rail-copy {
    grid-template-columns: auto 1fr auto;
    align-items: baseline;
    gap: 10px;
  }

  .flow-session-rail-copy strong {
    text-align: center;
  }
}

@media (max-width: 640px) {
  .flow-ready-screen[data-flow-ui-phase7="true"] .flow-phase1-shell {
    width: min(calc(100% - 28px), 1180px);
    padding-top: 20px;
  }

  .flow-choice-group {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 15px 0;
  }

  .flow-choice-group legend {
    padding-top: 0;
  }

  .flow-choice-row--length {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .flow-choice-row--categories {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flow-choice-row--difficulty {
    grid-template-columns: 1fr;
  }

  .flow-choice {
    min-height: 48px;
    padding: 9px 9px 9px 12px;
  }

  .flow-choice-row--length .flow-choice small {
    display: none;
  }

  .flow-setup-heading,
  .flow-setup-itinerary-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

  .flow-session-rail {
    padding: 10px 0 12px;
  }

  .flow-session-rail-copy {
    grid-template-columns: 1fr auto;
    gap: 4px 10px;
  }

  .flow-session-rail-copy strong {
    grid-column: 1 / -1;
    grid-row: 1;
    text-align: left;
  }

  .flow-session-rail-copy span {
    grid-column: 1;
    grid-row: 2;
  }

  .flow-session-rail-copy small {
    grid-column: 2;
    grid-row: 2;
    text-align: right;
  }

  .flow-itinerary-name {
    display: none;
  }

  .flow-itinerary-step {
    padding-right: 0;
  }

  .flow-chapter-screen[data-flow-ui-phase7="true"] .flow-chapter-transition {
    grid-template-areas:
      "rail"
      "index"
      "kicker"
      "title"
      "lead"
      "brief"
      "action"
      "note";
  }
}

@media (prefers-reduced-motion: reduce) {
  .flow-choice,
  .flow-choice::before {
    transition: none;
  }
}