:root {
  color-scheme: light;
  --ink: #16302d;
  --muted: #647572;
  --surface: #ffffff;
  --surface-soft: #eff6f3;
  --line: #d7e4df;
  --forest: #153e3a;
  --forest-bright: #1e6a5f;
  --mint: #8fe0bd;
  --cold: #4389c8;
  --warm: #e59b2f;
  --hot: #e65d42;
  --danger: #a83f32;
  --success: #157454;
  --shadow: 0 18px 45px rgba(20, 62, 57, 0.12);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: #eaf3ef;
}

body {
  min-width: 280px;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 85% 8%, rgba(143, 224, 189, 0.36), transparent 28rem),
    linear-gradient(180deg, #f5faf7 0%, #e9f2ee 100%);
}

button,
input {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

[hidden] {
  display: none !important;
}

.app-shell {
  width: min(100%, 640px);
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0 auto;
  padding: max(24px, env(safe-area-inset-top)) 18px max(20px, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
}

.app-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.brand-mark {
  position: relative;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  border-radius: 15px 15px 18px 18px;
  background: var(--forest);
  box-shadow: 0 8px 18px rgba(21, 62, 58, 0.2);
}

.brand-mark::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 10px;
  width: 14px;
  height: 14px;
  border: 4px solid var(--mint);
  border-radius: 50%;
  transform: translateX(-50%);
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 5px;
  width: 10px;
  height: 10px;
  background: var(--forest);
  border-right: 4px solid var(--mint);
  border-bottom: 4px solid var(--mint);
  transform: translateX(-50%) rotate(45deg);
}

.brand-mark span {
  display: none;
}

.eyebrow,
.brand-name,
.screen-kicker,
.success-label,
.proximity-label {
  margin: 0;
}

.eyebrow {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.brand-name {
  margin-top: 2px;
  font-size: 1.05rem;
  font-weight: 800;
}

.screen {
  width: 100%;
}

.card {
  padding: clamp(24px, 7vw, 42px);
  border: 1px solid rgba(215, 228, 223, 0.85);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.93);
  box-shadow: var(--shadow);
}

.screen-kicker,
.success-label {
  color: var(--forest-bright);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

h1 {
  margin: 10px 0 14px;
  font-size: clamp(2rem, 9vw, 3.5rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

h2 {
  margin: 0 0 8px;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.lead {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.65;
}

.notice {
  margin: 22px 0 0;
  padding: 13px 15px;
  border: 1px solid #b9d9ce;
  border-radius: 14px;
  color: var(--forest);
  background: #eaf7f1;
  line-height: 1.45;
}

.privacy-note {
  margin: 18px 2px 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.button {
  width: 100%;
  min-height: 54px;
  border: 0;
  border-radius: 16px;
  padding: 14px 20px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease, background-color 150ms ease;
}

.button:active {
  transform: translateY(1px) scale(0.995);
}

.button:focus-visible,
.text-button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(30, 106, 95, 0.28);
  outline-offset: 3px;
}

.button-primary {
  margin-top: 26px;
  color: #ffffff;
  background: var(--forest);
  box-shadow: 0 12px 24px rgba(21, 62, 58, 0.22);
}

.button-primary:hover {
  background: #0d4c44;
}

.button-secondary {
  margin: 16px 0 0;
  color: var(--forest);
  border: 1px solid var(--line);
  background: var(--surface);
}

.search-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 18px;
}

.search-heading h1 {
  margin-bottom: 0;
  font-size: clamp(2rem, 9vw, 3rem);
}

.status-badge {
  flex: 0 0 auto;
  margin-top: 3px;
  padding: 8px 11px;
  border-radius: 999px;
  color: var(--forest);
  background: #dcebe6;
  font-size: 0.72rem;
  font-weight: 800;
}

.proximity-card {
  --signal-color: #76908a;
  --pulse-duration: 3.2s;
  position: relative;
  min-height: 390px;
  overflow: hidden;
  padding: 245px 28px 26px;
  border-radius: 30px;
  color: #ffffff;
  text-align: center;
  background: linear-gradient(160deg, #546b67, #253c39);
  box-shadow: var(--shadow);
  transition: background 350ms ease;
}

.proximity-card[data-level="cold"] {
  --signal-color: #9ed6ff;
  --pulse-duration: 3.8s;
  background: linear-gradient(160deg, #4389c8, #215176);
}

.proximity-card[data-level="warm"] {
  --signal-color: #ffe2a1;
  --pulse-duration: 2.2s;
  background: linear-gradient(160deg, #e9a440, #a95e1a);
}

.proximity-card[data-level="hot"] {
  --signal-color: #ffd0b5;
  --pulse-duration: 0.95s;
  background: linear-gradient(160deg, #ef7356, #a8342f);
}

.pulse-field {
  position: absolute;
  top: 34px;
  left: 50%;
  width: 190px;
  height: 190px;
  transform: translateX(-50%);
}

.pulse-core,
.pulse-ring {
  position: absolute;
  left: 50%;
  top: 50%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.pulse-core {
  width: 42px;
  height: 42px;
  background: var(--signal-color);
  box-shadow: 0 0 35px var(--signal-color);
}

.pulse-ring {
  width: 72px;
  height: 72px;
  border: 2px solid var(--signal-color);
  opacity: 0;
  animation: pulse var(--pulse-duration) ease-out infinite;
}

.pulse-ring-2 {
  animation-delay: calc(var(--pulse-duration) / 2);
}

.proximity-card[data-level="waiting"] .pulse-ring {
  animation-duration: 3.2s;
}

@keyframes pulse {
  0% { opacity: 0.8; transform: translate(-50%, -50%) scale(0.6); }
  80%, 100% { opacity: 0; transform: translate(-50%, -50%) scale(2.6); }
}

.proximity-label {
  opacity: 0.76;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.proximity-text {
  margin: 7px 0 10px;
  font-size: clamp(2.1rem, 10vw, 3.2rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
}

.proximity-hint {
  max-width: 390px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.9rem;
  line-height: 1.48;
}

.diagnostics {
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
}

.diagnostics summary {
  padding: 17px 18px;
  font-weight: 800;
  cursor: pointer;
}

.diagnostics dl {
  margin: 0;
  padding: 0 18px 18px;
}

.diagnostics dl div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  gap: 14px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}

.diagnostics dt {
  color: var(--muted);
  font-size: 0.78rem;
}

.diagnostics dd {
  margin: 0;
  overflow-wrap: anywhere;
  font-size: 0.82rem;
  font-weight: 700;
  text-align: right;
}

.diagnostic-error dd {
  color: var(--danger);
}

.story-block,
.riddle-block {
  margin-top: 24px;
  padding: 19px;
  border-radius: 17px;
  background: var(--surface-soft);
}

.riddle-block {
  border: 1px solid #c9ddd5;
  background: #ffffff;
}

.story-block p,
.riddle-block p {
  margin: 0;
  line-height: 1.62;
}

form {
  margin-top: 24px;
}

label {
  display: block;
  margin: 0 0 8px 2px;
  font-size: 0.84rem;
  font-weight: 800;
}

input {
  width: 100%;
  min-height: 54px;
  border: 1px solid #b9cbc5;
  border-radius: 15px;
  padding: 12px 15px;
  color: var(--ink);
  background: #ffffff;
  font-size: 1rem;
}

input:focus {
  border-color: var(--forest-bright);
}

form .button {
  margin-top: 14px;
}

.message {
  margin: 14px 0 0;
  padding: 12px 14px;
  border-radius: 12px;
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.45;
}

.message-error {
  color: #7b2d25;
  background: #fde9e5;
}

.message-success {
  color: #0e5f43;
  background: #e2f6ed;
}

.completion-card {
  text-align: center;
}

.completion-mark {
  display: grid;
  width: 82px;
  height: 82px;
  margin: 0 auto 24px;
  place-items: center;
  border-radius: 26px;
  color: var(--forest);
  background: var(--mint);
  font-size: 2.6rem;
  font-weight: 900;
  transform: rotate(-4deg);
  box-shadow: 0 14px 28px rgba(21, 116, 84, 0.17);
}

.completion-card h1 {
  max-width: 480px;
  margin-right: auto;
  margin-left: auto;
}

.app-footer {
  margin-top: auto;
  padding: 28px 0 4px;
  text-align: center;
}

.text-button {
  border: 0;
  padding: 10px 14px;
  color: #617470;
  background: transparent;
  font-size: 0.84rem;
  font-weight: 750;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}

noscript {
  display: block;
  margin: 20px;
  padding: 16px;
  color: #7b2d25;
  background: #fde9e5;
}

@media (max-width: 390px) {
  .app-shell {
    padding-right: 13px;
    padding-left: 13px;
  }

  .card {
    padding: 24px 20px;
    border-radius: 23px;
  }

  .search-heading {
    display: block;
  }

  .status-badge {
    display: inline-block;
    margin-top: 12px;
  }

  .proximity-card {
    min-height: 370px;
    padding-right: 20px;
    padding-left: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}