:root {
  --bg: #071411;
  --bg-soft: #0b201a;
  --card: rgba(17, 39, 32, 0.82);
  --card-strong: rgba(18, 45, 36, 0.96);
  --line: rgba(255, 255, 255, 0.09);
  --text: #f3fff8;
  --muted: #a8c2b6;
  --green: #54e291;
  --green-2: #25b96a;
  --cyan: #58d9d0;
  --yellow: #f5c95f;
  --orange: #ff9d5c;
  --red: #ff6f6f;
  --purple: #b99cff;
  --shadow: 0 28px 70px rgba(0, 0, 0, 0.32);
  --radius: 28px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, rgba(45, 190, 111, 0.17), transparent 28%),
    radial-gradient(circle at 90% 12%, rgba(52, 184, 193, 0.12), transparent 30%),
    linear-gradient(145deg, #06110e 0%, #081713 48%, #07120f 100%);
  overflow-x: hidden;
}

button,
input {
  font: inherit;
}

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

.ambient {
  position: fixed;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  filter: blur(110px);
  pointer-events: none;
  opacity: 0.16;
  z-index: -1;
}

.ambient-a {
  background: #31e77c;
  top: 8%;
  left: -220px;
}

.ambient-b {
  background: #35d5d0;
  bottom: -180px;
  right: -180px;
}

.site-header {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  background: linear-gradient(145deg, var(--green), var(--green-2));
  color: #04100b;
  font-weight: 900;
  box-shadow: 0 12px 32px rgba(84, 226, 145, 0.22);
}

.brand strong,
.brand span {
  display: block;
}

.brand strong {
  font-size: 16px;
}

.brand span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 70px;
}

.screen {
  display: none;
  animation: screenIn 0.45s ease both;
}

.screen.active {
  display: block;
}

@keyframes screenIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.glass {
  background: linear-gradient(160deg, rgba(21, 50, 40, 0.88), rgba(10, 28, 23, 0.82));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-card {
  min-height: 650px;
  border-radius: 36px;
  padding: clamp(34px, 7vw, 78px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-card::after {
  content: "";
  position: absolute;
  inset: auto -100px -180px auto;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  border: 80px solid rgba(84, 226, 145, 0.05);
  pointer-events: none;
}

.eyebrow {
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 12px;
  font-weight: 800;
}

.hero-card h1,
.result-hero h1 {
  margin: 16px 0 18px;
  max-width: 820px;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 0.98;
  letter-spacing: -0.045em;
}

.hero-card h1 span {
  color: var(--green);
}

.lead {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.65;
}

.feature-grid {
  margin-top: 38px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  max-width: 900px;
}

.feature-grid article {
  padding: 20px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
}

.feature-grid strong,
.feature-grid span {
  display: block;
}

.feature-grid strong {
  margin: 9px 0 6px;
}

.feature-grid span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.feature-icon {
  font-size: 26px;
}

.hero-actions,
.result-actions {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.primary-button,
.secondary-button,
.ghost-button {
  border: 0;
  border-radius: 14px;
  min-height: 50px;
  padding: 0 20px;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  font-weight: 800;
}

.primary-button {
  color: #03110a;
  background: linear-gradient(135deg, var(--green), #7bf2a9);
  box-shadow: 0 14px 30px rgba(84, 226, 145, 0.18);
}

.primary-button:hover,
.secondary-button:hover,
.ghost-button:hover {
  transform: translateY(-2px);
}

.secondary-button,
.ghost-button {
  color: var(--text);
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid var(--line);
}

.ghost-button {
  min-height: 42px;
  font-size: 13px;
}

.microcopy {
  margin-top: 18px;
  color: #769186;
  font-size: 12px;
}

.hidden {
  display: none !important;
}

/* Quiz */
.quiz-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 18px;
  align-items: stretch;
}

.quiz-side,
.question-panel,
.result-hero,
.result-card {
  border-radius: var(--radius);
}

.quiz-side {
  padding: 24px;
  min-height: 670px;
  display: flex;
  flex-direction: column;
}

.side-top {
  display: grid;
  place-items: center;
  gap: 16px;
}

.progress-ring {
  --progress: 2deg;
  width: 142px;
  height: 142px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: conic-gradient(var(--green) var(--progress), rgba(255,255,255,0.07) 0);
  position: relative;
}

.progress-ring::before {
  content: "";
  position: absolute;
  width: 112px;
  height: 112px;
  border-radius: 50%;
  background: #0b201a;
  border: 1px solid var(--line);
}

.progress-ring-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.progress-ring-inner strong,
.progress-ring-inner span {
  display: block;
}

.progress-ring-inner strong {
  font-size: 25px;
}

.progress-ring-inner span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
}

.category-list {
  margin-top: 32px;
  display: grid;
  gap: 8px;
}

.category-item {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  padding: 9px 10px;
  border-radius: 12px;
  color: #789487;
  font-size: 13px;
}

.category-item.active {
  color: var(--text);
  background: rgba(84, 226, 145, 0.09);
  border: 1px solid rgba(84, 226, 145, 0.14);
}

.category-item.done {
  color: #a8c9b9;
}

.category-item .cat-icon {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: rgba(255,255,255,0.04);
}

.save-state {
  margin-top: auto;
  padding-top: 22px;
  color: #789487;
  font-size: 11px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.save-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 12px rgba(84,226,145,.8);
}

.question-panel {
  min-height: 670px;
  padding: clamp(24px, 4vw, 42px);
  display: flex;
  flex-direction: column;
}

.question-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
}

.category-badge,
.question-counter {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
}

.category-badge {
  padding: 0 12px;
  color: #06150d;
  background: var(--green);
}

.question-counter {
  margin-left: 8px;
  color: var(--muted);
}

.text-button {
  border: 0;
  background: transparent;
  cursor: pointer;
  color: var(--muted);
  font-size: 12px;
}

.text-button.danger:hover {
  color: var(--red);
}

.progress-line {
  margin-top: 18px;
  height: 6px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255,255,255,.06);
}

#progressBar {
  width: 2%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--green-2), var(--green));
  transition: width .35s ease;
}

.question-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
  padding: 34px 0 28px;
}

.question-icon {
  font-size: 44px;
}

.question-content h2 {
  margin: 16px 0 10px;
  font-size: clamp(27px, 4vw, 42px);
  line-height: 1.12;
  letter-spacing: -0.025em;
}

.question-help {
  margin: 0 0 28px;
  color: var(--muted);
  line-height: 1.6;
  font-size: 14px;
}

.answer-area {
  display: grid;
  gap: 10px;
}

.answer-button {
  width: 100%;
  min-height: 58px;
  padding: 13px 16px;
  border-radius: 15px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.035);
  color: var(--text);
  cursor: pointer;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: border .18s ease, background .18s ease, transform .18s ease;
}

.answer-button:hover {
  transform: translateX(3px);
  border-color: rgba(84,226,145,.44);
  background: rgba(84,226,145,.075);
}

.answer-button.selected {
  border-color: var(--green);
  background: rgba(84,226,145,.11);
}

.answer-check {
  min-width: 25px;
  height: 25px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255,255,255,.12);
  color: transparent;
}

.answer-button.selected .answer-check {
  color: #06150d;
  border-color: var(--green);
  background: var(--green);
}

.number-wrap {
  display: flex;
  align-items: stretch;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 16px;
  overflow: hidden;
  background: rgba(255,255,255,.035);
}

.number-input {
  width: 100%;
  min-width: 0;
  padding: 18px;
  border: 0;
  outline: none;
  color: var(--text);
  background: transparent;
  font-size: 23px;
  font-weight: 800;
}

.number-unit {
  display: grid;
  place-items: center;
  padding: 0 17px;
  color: var(--muted);
  border-left: 1px solid rgba(255,255,255,.08);
  white-space: nowrap;
  font-size: 13px;
}

.input-hint {
  margin-top: 10px;
  color: #708e80;
  font-size: 11px;
}

.input-error {
  min-height: 18px;
  margin: 12px 0 0;
  color: var(--red);
  font-size: 12px;
}

.question-navigation {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

/* Result */
.result-hero {
  padding: clamp(28px, 5vw, 52px);
}

.result-top {
  display: grid;
  grid-template-columns: 1fr 330px;
  gap: 40px;
  align-items: center;
}

.result-hero h1 {
  font-size: clamp(52px, 8vw, 88px);
  color: var(--green);
}

.result-hero h1 small {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 18px;
  letter-spacing: 0;
  font-weight: 600;
}

.rating-pill {
  width: fit-content;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,.04);
  font-size: 13px;
  font-weight: 800;
}

.comparison-text {
  max-width: 650px;
  color: var(--muted);
  line-height: 1.6;
}

.donut-wrap {
  display: grid;
  place-items: center;
}

.donut-chart {
  width: min(280px, 75vw);
  aspect-ratio: 1;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: conic-gradient(var(--green) 0 60deg, var(--cyan) 60deg 120deg, var(--yellow) 120deg 180deg, var(--orange) 180deg 240deg, var(--purple) 240deg 300deg, #5f7a70 300deg 360deg);
  position: relative;
  box-shadow: 0 20px 50px rgba(0,0,0,.22);
}

.donut-chart::after {
  content: "";
  width: 62%;
  height: 62%;
  border-radius: 50%;
  position: absolute;
  background: #0c211b;
  border: 1px solid var(--line);
}

.donut-center {
  position: relative;
  z-index: 1;
  text-align: center;
}

.donut-center strong,
.donut-center span {
  display: block;
}

.donut-center strong {
  font-size: 24px;
}

.donut-center span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 11px;
}

.result-meta-grid {
  margin-top: 35px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.result-meta-grid article {
  padding: 18px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.025);
}

.result-meta-grid span,
.result-meta-grid strong,
.result-meta-grid small {
  display: block;
}

.result-meta-grid span {
  color: var(--muted);
  font-size: 11px;
}

.result-meta-grid strong {
  margin: 7px 0 3px;
  font-size: 20px;
}

.result-meta-grid small {
  color: #718b7f;
  font-size: 11px;
}

.result-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.result-card {
  margin-top: 18px;
  padding: clamp(24px, 4vw, 36px);
}

.result-grid .result-card {
  margin-top: 0;
}

.section-heading h2 {
  margin: 7px 0 24px;
  font-size: 24px;
}

.category-bars,
.comparison-bars {
  display: grid;
  gap: 18px;
}

.bar-row {
  display: grid;
  gap: 8px;
}

.bar-head {
  display: flex;
  justify-content: space-between;
  gap: 15px;
  font-size: 13px;
}

.bar-head span:last-child {
  color: var(--muted);
}

.bar-track {
  height: 11px;
  border-radius: 999px;
  background: rgba(255,255,255,.055);
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  width: 0;
  border-radius: inherit;
  transition: width .7s ease;
}

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

.compare-row:last-child {
  border-bottom: 0;
}

.compare-title {
  display: flex;
  justify-content: space-between;
  gap: 15px;
  margin-bottom: 10px;
  font-size: 13px;
}

.compare-double {
  display: grid;
  gap: 6px;
}

.compare-line {
  display: grid;
  grid-template-columns: 58px 1fr 56px;
  gap: 9px;
  align-items: center;
  color: var(--muted);
  font-size: 10px;
}

.compare-line .bar-track {
  height: 8px;
}

.tips-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.tip-card {
  min-height: 180px;
  padding: 20px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.025);
}

.tip-card .tip-rank {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  background: rgba(84,226,145,.12);
  color: var(--green);
  font-weight: 900;
}

.tip-card strong {
  display: block;
  margin: 16px 0 8px;
}

.tip-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.calculation-details {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.detail-row {
  padding: 16px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.025);
}

.detail-row strong,
.detail-row span,
.detail-row small {
  display: block;
}

.detail-row strong {
  margin-bottom: 5px;
}

.detail-row span {
  color: var(--green);
  font-weight: 800;
}

.detail-row small {
  margin-top: 7px;
  color: var(--muted);
  line-height: 1.5;
}

.result-disclaimer {
  margin: 22px auto 0;
  max-width: 850px;
  text-align: center;
  color: #6f8c7e;
  font-size: 11px;
  line-height: 1.55;
}

/* dialog */
.method-dialog {
  width: min(850px, calc(100% - 28px));
  max-height: 88vh;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 0;
  color: var(--text);
  background: #0b1f19;
  box-shadow: var(--shadow);
}

.method-dialog::backdrop {
  background: rgba(1, 9, 6, 0.78);
  backdrop-filter: blur(5px);
}

.dialog-head {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 26px 18px;
  background: rgba(11,31,25,.96);
  border-bottom: 1px solid var(--line);
}

.dialog-head h2 {
  margin: 5px 0 0;
}

.dialog-close {
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text);
  background: rgba(255,255,255,.04);
  cursor: pointer;
  font-size: 26px;
}

.dialog-body {
  padding: 26px;
  color: var(--muted);
  line-height: 1.65;
}

.method-list {
  display: grid;
  gap: 10px;
  margin: 22px 0;
}

.method-list article {
  padding: 16px;
  border-radius: 15px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.025);
}

.method-list strong,
.method-list span {
  display: block;
}

.method-list strong {
  color: var(--text);
  margin-bottom: 5px;
}

.method-list span {
  font-size: 13px;
}

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

.source-links a {
  color: var(--green);
  text-decoration: none;
  padding: 9px 11px;
  border-radius: 10px;
  border: 1px solid rgba(84,226,145,.18);
  background: rgba(84,226,145,.06);
  font-size: 12px;
}

@media (max-width: 900px) {
  .quiz-layout,
  .result-top,
  .result-grid {
    grid-template-columns: 1fr;
  }

  .quiz-side {
    min-height: auto;
    padding: 18px;
  }

  .side-top {
    display: flex;
    justify-content: space-between;
  }

  .progress-ring {
    width: 90px;
    height: 90px;
  }

  .progress-ring::before {
    width: 70px;
    height: 70px;
  }

  .progress-ring-inner strong {
    font-size: 18px;
  }

  .category-list {
    grid-template-columns: repeat(3, 1fr);
    margin-top: 18px;
  }

  .save-state {
    margin-top: 12px;
  }

  .donut-wrap {
    margin-top: 10px;
  }

  .tips-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .feature-grid,
  .result-meta-grid,
  .calculation-details {
    grid-template-columns: 1fr;
  }

  .site-header {
    align-items: flex-start;
  }

  .brand span {
    display: none;
  }

  .hero-card {
    min-height: auto;
    padding: 34px 22px;
  }

  .question-panel {
    min-height: 610px;
    padding: 20px;
  }

  .category-list {
    grid-template-columns: 1fr 1fr;
  }

  .question-topline {
    align-items: flex-start;
  }

  .question-counter {
    display: block;
    margin: 7px 0 0;
  }

  .question-navigation .primary-button,
  .question-navigation .secondary-button {
    flex: 1;
  }
}

@media print {
  body {
    background: white;
    color: black;
  }

  .site-header,
  #startScreen,
  #questionScreen,
  .result-actions,
  .ambient,
  .method-dialog {
    display: none !important;
  }

  #resultScreen {
    display: block !important;
  }

  .glass {
    color: black;
    background: white;
    border: 1px solid #ddd;
    box-shadow: none;
  }

  .result-disclaimer,
  .comparison-text,
  .detail-row small,
  .tip-card p,
  .result-meta-grid span,
  .result-meta-grid small {
    color: #444;
  }
}
.site-footer {
  max-width: 1100px;
  margin: 60px auto 20px;
  padding: 25px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  color: #aeb8b2;
  font-size: 14px;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-links a {
  color: #54ef85;
  text-decoration: none;
  font-weight: 700;
}

.footer-links a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  .site-footer {
    flex-direction: column;
    text-align: center;
  }
}