:root {
  --navy-950: oklch(17% 0.042 250);
  --navy-900: oklch(23% 0.05 248);
  --navy-800: oklch(31% 0.055 248);
  --blue-700: oklch(42% 0.11 250);
  --blue-600: oklch(48% 0.12 250);
  --blue-400: oklch(68% 0.09 245);
  --paper: oklch(97.4% 0.012 88);
  --paper-2: oklch(94.8% 0.016 86);
  --ink: oklch(24% 0.03 250);
  --ink-soft: oklch(42% 0.03 248);
  --line: oklch(86% 0.02 240);
  --gold: oklch(72% 0.09 86);
  --danger: oklch(52% 0.16 25);
  --ok: oklch(52% 0.11 155);
  --radius: 18px;
  --shadow: 0 28px 60px oklch(18% 0.05 250 / 0.28);
  --serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--navy-950);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

button,
input {
  font: inherit;
}

.atmosphere {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(1200px 700px at 15% -10%, oklch(36% 0.07 245 / 0.55), transparent 55%),
    radial-gradient(900px 520px at 110% 10%, oklch(40% 0.06 230 / 0.28), transparent 50%),
    linear-gradient(180deg, var(--navy-900), var(--navy-950));
  pointer-events: none;
}

.app {
  position: relative;
  width: min(440px, 100%);
  min-height: 100dvh;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  padding:
    calc(18px + env(safe-area-inset-top))
    18px
    calc(20px + env(safe-area-inset-bottom));
}

.masthead {
  display: flex;
  align-items: center;
  gap: 14px;
  color: oklch(96% 0.02 240);
  padding: 8px 4px 22px;
}

.masthead-mark {
  width: 52px;
  height: 52px;
  color: var(--gold);
  flex: none;
}

.masthead-mark svg {
  width: 100%;
  height: 100%;
  display: block;
}

.eyebrow {
  margin: 0 0 4px;
  letter-spacing: 0.22em;
  font-size: 0.68rem;
  color: oklch(82% 0.04 230);
}

.masthead h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.28rem, 4.6vw, 1.62rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.page[hidden] {
  display: none;
}

.doc,
.result-doc {
  background: var(--paper);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.doc {
  padding: 26px 22px 24px;
}

.doc-rule {
  height: 3px;
  margin: -26px -22px 22px;
  background: linear-gradient(90deg, var(--blue-700), var(--gold) 55%, var(--blue-400));
}

.doc-head {
  display: grid;
  gap: 10px;
  margin-bottom: 26px;
}

.step {
  margin: 0 0 6px;
  color: var(--blue-600);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  font-weight: 600;
}

.doc-head h2,
.result-banner h2,
.verdict h3,
.tip h3 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
}

.doc-head h2 {
  font-size: 1.35rem;
}

.doc-aside {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.86rem;
}

.form {
  display: grid;
  gap: 18px;
}

.field {
  margin: 0;
  padding: 0;
  border: 0;
}

.field label,
.field legend {
  display: block;
  margin-bottom: 8px;
  font-size: 0.92rem;
  font-weight: 600;
}

.field input[type="text"],
.field input[type="tel"],
.field input[type="number"] {
  width: 100%;
  height: 50px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: oklch(99% 0.005 90);
  padding: 0 14px;
  font-size: 16px;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field input:focus-visible {
  border-color: var(--blue-600);
  box-shadow: 0 0 0 3px oklch(48% 0.12 250 / 0.18);
}

.field.is-invalid input {
  border-color: var(--danger);
}

.input-affix {
  position: relative;
}

.input-affix input {
  padding-right: 42px;
}

.input-affix span {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-soft);
}

.field-error {
  min-height: 1.15em;
  margin: 6px 0 0;
  color: var(--danger);
  font-size: 0.78rem;
}

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

.choice {
  display: block;
  cursor: pointer;
}

.choice input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.choice span {
  display: grid;
  gap: 4px;
  min-height: 78px;
  padding: 12px 12px 13px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: oklch(99% 0.005 90);
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.choice strong {
  font-size: 0.95rem;
}

.choice em {
  font-style: normal;
  font-size: 0.72rem;
  color: var(--ink-soft);
  line-height: 1.4;
}

.choice input:checked + span {
  border-color: var(--blue-600);
  background: oklch(96% 0.02 245);
  box-shadow: inset 0 0 0 1px var(--blue-600);
}

.choice input:focus-visible + span {
  box-shadow: 0 0 0 3px oklch(48% 0.12 250 / 0.18);
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 52px;
  margin-top: 6px;
  border: 0;
  border-radius: 14px;
  background: linear-gradient(180deg, oklch(50% 0.12 248), var(--blue-700));
  color: oklch(98% 0.01 240);
  letter-spacing: 0.18em;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 10px 24px oklch(42% 0.11 250 / 0.28);
}

.btn-submit:hover {
  filter: brightness(1.05);
}

.btn-submit:active {
  transform: translateY(1px);
}

.btn-submit:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.btn-submit:disabled {
  opacity: 0.7;
  cursor: wait;
}

.result-doc {
  padding: 0 0 22px;
}

.result-banner {
  position: relative;
  padding: 28px 96px 22px 22px;
  background:
    linear-gradient(180deg, oklch(28% 0.06 248), oklch(22% 0.05 250));
  color: oklch(97% 0.015 240);
  text-align: left;
}

.stamp {
  position: absolute;
  top: 18px;
  right: 16px;
  width: 76px;
  height: 76px;
  display: grid;
  place-items: center;
  border: 2px solid oklch(72% 0.14 25);
  border-radius: 50%;
  color: oklch(72% 0.14 25);
  font-family: var(--serif);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  transform: rotate(-14deg);
  opacity: 0.92;
  box-shadow: inset 0 0 0 5px oklch(72% 0.14 25 / 0.28);
}

.result-kicker {
  margin: 0 0 8px;
  letter-spacing: 0.2em;
  font-size: 0.68rem;
  color: var(--gold);
}

.result-banner h2 {
  font-size: 1.42rem;
  letter-spacing: 0.04em;
}

.amount-label {
  margin: 22px 0 4px;
  font-size: 0.78rem;
  color: oklch(84% 0.03 240);
}

.amount {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0;
  font-family: var(--sans);
  font-size: 2.35rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums lining-nums;
  letter-spacing: 0;
  line-height: 1.15;
}

.amount-unit {
  font-size: 1.2rem;
  font-weight: 600;
}

.amount-suffix {
  font-size: 0.95rem;
  font-weight: 500;
  color: oklch(84% 0.03 240);
}

.meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 0;
  padding: 18px 22px 8px;
}

.meta dt {
  font-size: 0.75rem;
  color: var(--ink-soft);
  margin-bottom: 4px;
}

.meta dd {
  margin: 0;
  font-weight: 600;
  font-size: 0.95rem;
}

.verdict,
.tip {
  margin: 12px 22px 0;
  padding: 16px 16px 15px;
  border-radius: 12px;
}

.verdict {
  background: oklch(95.5% 0.018 240);
}

.tip {
  background: oklch(96% 0.025 85);
  border: 1px solid oklch(86% 0.05 85);
}

.verdict h3,
.tip h3 {
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.verdict p,
.tip p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
  text-align: justify;
}

.colophon {
  margin-top: auto;
  padding: 18px 4px 0;
  color: oklch(78% 0.03 240);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.colophon p {
  margin: 0;
}

.overlay {
  position: fixed;
  inset: 0;
  background: oklch(16% 0.04 250 / 0.62);
  display: grid;
  place-items: center;
  padding: 24px;
  z-index: 20;
}

.overlay[hidden] {
  display: none;
}

.overlay-card {
  width: min(320px, 100%);
  padding: 28px 22px;
  border-radius: 16px;
  background: var(--paper);
  text-align: center;
  box-shadow: var(--shadow);
}

.pulse {
  width: 42px;
  height: 42px;
  margin: 0 auto 14px;
  border: 2px solid var(--line);
  border-top-color: var(--blue-600);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.overlay-card p {
  margin: 0;
}

.overlay-sub {
  margin-top: 6px !important;
  color: var(--ink-soft);
  font-size: 0.8rem;
}

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

@media (min-width: 768px) {
  body {
    display: grid;
    place-items: center;
    min-height: 100vh;
    padding: 28px 16px;
  }

  .app {
    min-height: 820px;
    border: 1px solid oklch(70% 0.04 240 / 0.18);
    border-radius: 28px;
    background: oklch(20% 0.04 248 / 0.35);
    box-shadow: 0 40px 80px oklch(10% 0.04 250 / 0.45);
    padding: 22px 20px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pulse,
  .btn-submit {
    animation: none;
    transition: none;
  }
}