:root {
  --ink: #0b1f1c;
  --ink-soft: #163a34;
  --signal: #ff5a1f;
  --signal-deep: #e04a12;
  --mist: #e4ebe8;
  --paper: #f7faf8;
  --line: rgba(11, 31, 28, 0.12);
  --muted: rgba(11, 31, 28, 0.58);
  --ok: #1f8a7a;
  --radar: #071614;
  --shadow: 0 20px 48px rgba(7, 22, 20, 0.18);
  --radius: 12px;
  --font-brand: "ZCOOL QingKe HuangYou", "PingFang SC", sans-serif;
  --font-body: "IBM Plex Sans", "Noto Sans SC", "PingFang SC", sans-serif;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

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

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--mist);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  background:
    radial-gradient(900px 520px at 100% -8%, rgba(255, 90, 31, 0.1), transparent 55%),
    radial-gradient(760px 480px at -12% 18%, rgba(31, 138, 122, 0.12), transparent 52%),
    linear-gradient(180deg, #d9e3df 0%, var(--mist) 38%, #dce6e2 100%);
  background-attachment: fixed;
}

button,
input,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: 0;
  background: none;
}

a {
  color: var(--ink-soft);
}

.app {
  width: min(720px, 100%);
  margin: 0 auto;
  min-height: 100dvh;
  padding: 0 20px calc(28px + var(--safe-bottom));
  position: relative;
}

.screen {
  display: none;
  animation: rise 0.5s ease both;
}

.screen.active {
  display: block;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* —— Intro: one composition, full-bleed radar —— */
.intro {
  min-height: 100dvh;
  min-height: 100svh;
  margin: 0 -20px;
  padding: 0;
  display: grid;
  grid-template-rows: 1fr auto;
  position: relative;
  overflow: hidden;
}

.intro-visual {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  isolation: isolate;
}

.intro-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 62% 38%, rgba(255, 90, 31, 0.18), transparent 28%),
    radial-gradient(circle at 30% 70%, rgba(31, 138, 122, 0.16), transparent 34%),
    linear-gradient(165deg, #0a221e 0%, #0f2e28 42%, #071614 100%);
}

.intro-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(247, 250, 248, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 250, 248, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 55% 42%, #000 20%, transparent 72%);
  opacity: 0.7;
}

.radar-stage {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.radar-rings {
  position: absolute;
  left: 50%;
  top: 42%;
  width: min(78vw, 520px);
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px solid rgba(247, 250, 248, 0.16);
  animation: pulse 5s ease-in-out infinite;
}

.radar-rings::before,
.radar-rings::after {
  content: "";
  position: absolute;
  inset: 18%;
  border-radius: 50%;
  border: 1px solid rgba(247, 250, 248, 0.2);
}

.radar-rings::after {
  inset: 36%;
  border-color: rgba(255, 90, 31, 0.55);
}

.radar-sweep {
  position: absolute;
  left: 50%;
  top: 42%;
  width: min(39vw, 260px);
  height: 2px;
  transform-origin: left center;
  background: linear-gradient(90deg, rgba(255, 90, 31, 0.95), transparent);
  animation: sweep 3.4s linear infinite;
  box-shadow: 0 0 18px rgba(255, 90, 31, 0.35);
}

.radar-dot {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 6px rgba(255, 90, 31, 0.16);
}

.radar-dot:nth-child(4) {
  left: 62%;
  top: 30%;
  animation: blink 2.4s ease-in-out infinite;
}
.radar-dot:nth-child(5) {
  left: 28%;
  top: 52%;
  animation: blink 2.4s ease-in-out 0.45s infinite;
}
.radar-dot:nth-child(6) {
  left: 70%;
  top: 58%;
  animation: blink 2.4s ease-in-out 0.9s infinite;
}

@keyframes sweep {
  to {
    transform: rotate(360deg);
  }
}

@keyframes pulse {
  0%,
  100% {
    transform: translate(-50%, -50%) scale(0.98);
    opacity: 0.85;
  }
  50% {
    transform: translate(-50%, -50%) scale(1.02);
    opacity: 1;
  }
}

@keyframes blink {
  0%,
  100% {
    opacity: 0.35;
    transform: scale(0.9);
  }
  50% {
    opacity: 1;
    transform: scale(1);
  }
}

.intro-copy {
  position: relative;
  z-index: 1;
  padding: calc(24px + var(--safe-top)) 24px calc(36px + var(--safe-bottom));
  background: linear-gradient(180deg, transparent 0%, rgba(7, 22, 20, 0.55) 18%, rgba(7, 22, 20, 0.92) 48%, #071614 100%);
  color: var(--paper);
}

.brand {
  font-family: var(--font-brand);
  font-size: clamp(2.85rem, 11vw, 4rem);
  letter-spacing: 0.05em;
  margin: 0 0 12px;
  line-height: 1.02;
  color: var(--paper);
  text-shadow: 0 8px 28px rgba(0, 0, 0, 0.25);
}

.brand span {
  color: var(--signal);
}

.lede {
  margin: 0 0 24px;
  max-width: 20em;
  color: rgba(247, 250, 248, 0.78);
  font-size: 1.05rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: var(--radius);
  transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--signal);
  color: #fff;
}

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

.intro .btn-primary {
  background: var(--signal);
  color: #fff;
}

.intro .btn-ghost {
  border: 1px solid rgba(247, 250, 248, 0.28);
  background: rgba(247, 250, 248, 0.08);
  color: var(--paper);
  backdrop-filter: blur(8px);
}

.btn-ghost {
  border: 1px solid var(--line);
  background: rgba(247, 250, 248, 0.55);
  backdrop-filter: blur(8px);
}

.btn-block {
  width: 100%;
}

.btn-signal {
  background: var(--signal);
  color: #fff;
}

.btn-signal:hover {
  background: var(--signal-deep);
}

/* —— Shared chrome —— */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: calc(14px + var(--safe-top)) 0 8px;
  position: sticky;
  top: 0;
  z-index: 5;
  background: linear-gradient(180deg, rgba(228, 235, 232, 0.96), rgba(228, 235, 232, 0.78), transparent);
  backdrop-filter: blur(10px);
}

.brand-mini {
  font-family: var(--font-brand);
  font-size: 1.45rem;
  letter-spacing: 0.03em;
  margin: 0;
}

.brand-mini span {
  color: var(--signal);
}

.step-note {
  font-size: 0.85rem;
  color: var(--muted);
}

.panel {
  margin-top: 8px;
  padding: 18px 0 8px;
}

.section-title {
  font-family: var(--font-brand);
  font-size: 1.7rem;
  margin: 0 0 6px;
  letter-spacing: 0.02em;
}

.section-desc {
  margin: 0 0 18px;
  color: var(--muted);
}

.field {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

.field span {
  font-size: 0.9rem;
  color: var(--muted);
}

.field input,
.field select,
.add-row input,
.add-row select {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 14px;
  background: rgba(247, 250, 248, 0.85);
  outline: none;
}

.field input:focus,
.field select:focus,
.add-row input:focus,
.add-row select:focus {
  border-color: rgba(255, 90, 31, 0.55);
  box-shadow: 0 0 0 3px rgba(255, 90, 31, 0.12);
}

.member-list {
  display: grid;
  gap: 0;
  margin: 8px 0 18px;
}

.member {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 12px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.member strong {
  font-weight: 600;
}

.member small {
  display: block;
  color: var(--muted);
  margin-top: 2px;
}

.member .remove {
  color: var(--muted);
  font-size: 0.9rem;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.add-stack {
  display: grid;
  gap: 4px;
  margin-bottom: 28px;
  scroll-margin-top: 72px;
}

.cascade {
  display: grid;
  gap: 0;
}

.place-refine {
  margin-top: 8px;
}

.kind-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.kind-chip {
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(247, 250, 248, 0.72);
  font-size: 0.92rem;
}

.kind-chip.active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.filter-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.place-options {
  display: grid;
  gap: 0;
  max-height: 320px;
  overflow: auto;
  margin: 8px 0 4px;
  border-top: 1px solid var(--line);
}

.place-option {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 12px;
  text-align: left;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.place-option strong {
  grid-column: 1;
  font-weight: 600;
}

.place-option span {
  grid-column: 1;
  color: var(--muted);
  font-size: 0.86rem;
}

.place-option em {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
  font-style: normal;
  font-size: 0.8rem;
  color: var(--ok);
}

.place-option.active {
  color: var(--signal);
}

.place-option.active strong {
  color: var(--signal);
}

.picked-place {
  margin: 10px 0 4px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
  display: grid;
  gap: 4px;
}

.picked-place.ok {
  color: var(--ink);
}

.picked-place.ok .confirm-title {
  color: var(--ok);
  font-weight: 600;
}

.picked-place.bad {
  color: var(--signal-deep);
}

.picked-place span {
  color: var(--muted);
  font-size: 0.86rem;
}

#add-member:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 8px 0 22px;
}

.cat {
  min-height: 52px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(247, 250, 248, 0.72);
  text-align: left;
  padding: 0 16px;
  transition: border-color 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.cat.active {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper);
}

.footer-actions {
  display: grid;
  gap: 10px;
  margin-top: 8px;
  position: sticky;
  bottom: calc(12px + var(--safe-bottom));
}

/* —— Results —— */
.summary {
  display: grid;
  gap: 6px;
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.summary p {
  margin: 0;
  color: var(--muted);
}

.summary strong {
  color: var(--ink);
  font-weight: 600;
}

.place-list {
  display: grid;
  gap: 0;
}

.place {
  width: 100%;
  text-align: left;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 8px;
  transition: opacity 0.18s ease;
}

.place:hover .place-name {
  color: var(--signal);
}

.place-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
}

.place-name {
  font-size: 1.12rem;
  font-weight: 600;
  margin: 0;
  transition: color 0.18s ease;
}

.place-price {
  white-space: nowrap;
  color: var(--muted);
  font-size: 0.92rem;
}

.place-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  color: var(--muted);
  font-size: 0.92rem;
}

.fair {
  color: var(--ok);
  font-weight: 500;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-size: 0.8rem;
  color: var(--ink-soft);
  border-bottom: 1px dashed rgba(11, 31, 28, 0.25);
  padding-bottom: 1px;
}

.empty {
  padding: 28px 0;
  color: var(--muted);
}

/* —— Detail —— */
.detail-hero {
  padding: 8px 0 18px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 18px;
}

.detail-hero h2 {
  font-family: var(--font-brand);
  font-size: clamp(1.8rem, 6vw, 2.3rem);
  margin: 0 0 8px;
  letter-spacing: 0.02em;
  line-height: 1.15;
}

.detail-hero p {
  margin: 0;
  color: var(--muted);
}

.detail-hero .detail-blurb,
.detail-hero .detail-dist {
  margin-top: 8px;
}

.block {
  margin-bottom: 26px;
}

.block h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
}

.fun-list {
  display: grid;
  gap: 0;
}

.fun-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.fun-item strong {
  display: block;
  margin-bottom: 4px;
}

.fun-item span {
  color: var(--muted);
  font-size: 0.92rem;
}

.link-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.link-row a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  background: rgba(247, 250, 248, 0.75);
}

.link-row a:hover {
  border-color: var(--ink);
}

.loading {
  padding: 40px 0;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 10px;
}

.loading::before {
  content: "";
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--line);
  border-top-color: var(--signal);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.demo-tip {
  margin: 0 0 14px;
  font-size: 0.86rem;
  color: var(--muted);
}

/* —— PWA install —— */
.install {
  position: fixed;
  left: 12px;
  right: 12px;
  bottom: calc(12px + var(--safe-bottom));
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(11, 31, 28, 0.96);
  color: var(--paper);
  box-shadow: var(--shadow);
  animation: rise 0.45s ease both;
}

.install[hidden] {
  display: none !important;
}

.install img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
}

.install strong {
  display: block;
  font-size: 0.95rem;
}

.install p {
  margin: 2px 0 0;
  font-size: 0.8rem;
  opacity: 0.78;
}

.install-actions {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: flex-end;
}

.install .install-go {
  color: var(--signal);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 4px 2px;
  white-space: nowrap;
}

.install .install-close {
  color: var(--paper);
  font-size: 1.15rem;
  line-height: 1;
  padding: 4px;
  opacity: 0.75;
}

@media (min-width: 860px) {
  .app {
    width: min(960px, 100%);
  }

  .intro {
    grid-template-columns: 0.95fr 1.05fr;
    grid-template-rows: 1fr;
    align-items: stretch;
  }

  .intro-visual {
    position: absolute;
    inset: 0;
  }

  .intro-copy {
    grid-column: 1;
    align-self: end;
    max-width: 420px;
    margin: 0;
    padding: 56px 32px 56px 40px;
    background: linear-gradient(
      90deg,
      rgba(7, 22, 20, 0.94) 0%,
      rgba(7, 22, 20, 0.78) 62%,
      rgba(7, 22, 20, 0.15) 100%
    );
  }

  .category-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (display-mode: standalone) {
  .install {
    display: none !important;
  }
}