:root {
  --bg: #f6f7f8;
  --surface: #ffffff;
  --surface-alt: #f0f3f5;
  --text: #182126;
  --muted: #5d6972;
  --line: #cfd7dd;
  --line-strong: #9eabb6;
  --brand: #0f766e;
  --brand-strong: #0a5c56;
  --danger: #a94442;
  --success: #1f6f43;
  --radius: 16px;
  --radius-small: 10px;
  --container: 1120px;
  --space-0: 4px;
  --space-1: 8px;
  --space-2: 12px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  width: 100%;
  max-width: 100%;
  overflow-x: clip;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  width: 100%;
  max-width: 100%;
  overflow-x: clip;
}

p,
ul,
ol,
dl,
blockquote {
  margin: 0 0 var(--space-4);
}

img,
canvas,
video {
  max-width: 100%;
  display: block;
  height: auto;
}

svg {
  max-width: 100%;
}

a {
  color: var(--brand-strong);
  text-decoration-thickness: 1px;
}

a:hover {
  text-decoration: none;
}

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

button,
.button {
  min-height: 48px;
}

:focus-visible {
  outline: 3px solid #1a8d84;
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -3rem;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-small);
  z-index: 1000;
}

.skip-link:focus {
  top: var(--space-3);
}

.container {
  width: min(100% - (var(--space-3) * 2), var(--container));
  margin: 0 auto;
  min-width: 0;
}

.section {
  padding: var(--space-6) 0;
}

.section-alt {
  background: var(--surface-alt);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 247, 248, 0.97);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 76px;
  padding: var(--space-3) 0;
  min-width: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  min-width: 0;
  flex: 1 1 auto;
}

.brand span:last-child {
  overflow-wrap: anywhere;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  display: inline-grid;
  place-items: center;
  border: 2px solid var(--brand);
  border-radius: 0.5rem;
  color: var(--brand);
  font-size: 1rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-width: 0;
}

.site-nav a {
  color: var(--text);
  text-decoration: none;
  padding: var(--space-1) 0;
  border-bottom: 2px solid transparent;
}

.site-nav a[aria-current="page"],
.site-nav a:hover {
  border-color: var(--brand);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  border-radius: var(--radius-small);
  inline-size: 48px;
  block-size: 48px;
  padding: 0;
}

.nav-toggle span {
  display: block;
  inline-size: 20px;
  block-size: 2px;
  background: var(--text);
  margin: 5px auto;
}

.hero-grid,
.page-grid,
.footer-grid,
.grid {
  display: grid;
  gap: var(--space-5);
  min-width: 0;
}

.hero-grid,
.page-grid {
  align-items: start;
}

.hero h1,
h1,
h2,
h3 {
  line-height: 1.2;
  margin: 0 0 var(--space-3);
}

h1 {
  font-size: clamp(2rem, 4vw, 3.5rem);
}

h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
}

h3 {
  font-size: 1.1rem;
}

.eyebrow {
  margin: 0 0 var(--space-2);
  color: var(--brand-strong);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
}

.lead {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 62ch;
  margin-bottom: var(--space-4);
}

.helper-text,
.status-text,
.footer-text,
.notice {
  color: var(--muted);
}

.notice {
  border-left: 3px solid var(--brand);
  padding-left: var(--space-3);
  margin-bottom: var(--space-4);
}

.button-row,
.button-stack {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  min-width: 0;
}

.button-stack {
  flex-direction: column;
}

.button-row + .helper-text,
.button-row + .notice,
.button-row + .status-text {
  margin-top: var(--space-3);
}

.button,
button.button,
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-small);
  border: 1px solid var(--brand);
  background: var(--brand);
  color: #ffffff;
  text-decoration: none;
  padding: var(--space-2) var(--space-4);
  cursor: pointer;
  max-width: 100%;
  white-space: normal;
  text-align: center;
}

.button:hover,
button:hover {
  background: var(--brand-strong);
  border-color: var(--brand-strong);
}

.button:disabled,
button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.button-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--line-strong);
}

.button-secondary:hover {
  background: var(--surface-alt);
  border-color: var(--line-strong);
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-4);
}

.hero-visual {
  min-height: 320px;
  display: grid;
  place-items: center;
}

.qr-illustration {
  position: relative;
  width: min(100%, 340px);
  aspect-ratio: 1;
  border: 2px solid var(--line-strong);
  border-radius: 24px;
  background: linear-gradient(180deg, #ffffff 0%, #f0f3f5 100%);
}

.qr-box {
  position: absolute;
  border: 14px solid var(--text);
  border-radius: 18px;
}

.qr-box-large {
  inline-size: clamp(72px, 27%, 92px);
  block-size: clamp(72px, 27%, 92px);
  top: clamp(16px, 7%, 24px);
  left: clamp(16px, 7%, 24px);
}

.qr-box-small {
  inline-size: clamp(56px, 21%, 72px);
  block-size: clamp(56px, 21%, 72px);
  bottom: clamp(20px, 10%, 34px);
  right: clamp(20px, 10%, 34px);
}

.scan-frame {
  position: absolute;
  inset: 22%;
  border: 3px solid var(--brand);
  border-radius: 20px;
}

.cards-3,
.cards-5 {
  grid-template-columns: repeat(1, minmax(0, 1fr));
}

.feature-card,
.step-card {
  height: 100%;
}

.step-number {
  width: 2.25rem;
  height: 2.25rem;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  margin-bottom: var(--space-3);
  font-weight: 700;
}

.faq-list {
  display: grid;
  gap: var(--space-3);
}

.content-stack {
  display: grid;
  gap: var(--space-4);
}

.top-gap {
  margin-top: var(--space-4);
}

details summary {
  cursor: pointer;
  font-weight: 700;
}

details p {
  margin-top: var(--space-3);
  margin-bottom: 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding: var(--space-6) 0;
  min-width: 0;
}

.footer-grid {
  grid-template-columns: 1fr;
  align-items: start;
}

.footer-grid > * {
  min-width: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  align-content: start;
  min-width: 0;
}

.footer-links a {
  text-decoration: none;
  overflow-wrap: anywhere;
}

.footer-brand {
  margin: 0 0 var(--space-2);
  font-weight: 700;
}

.footer-credit {
  margin: var(--space-2) 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

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

.scanner-preview-wrap,
.image-preview-card,
.result-card,
.helper-card {
  display: grid;
  gap: var(--space-4);
  min-width: 0;
}

.scanner-main-column,
.scanner-side-column,
.tool-main-column,
.tool-side-column {
  display: grid;
  align-content: start;
}

.scanner-main-column,
.tool-main-column {
  gap: var(--space-4);
}

.scanner-side-column,
.tool-side-column {
  gap: var(--space-3);
}

.scanner-main-column > .lead,
.scanner-main-column > .notice,
.scanner-main-column > .scanner-actions {
  margin-bottom: 0;
}

.scanner-actions {
  gap: var(--space-2);
}

.scanner-preview-wrap {
  gap: var(--space-3);
}

.result-card {
  gap: var(--space-3);
}

.helper-card {
  gap: var(--space-3);
}

.result-card .helper-text,
.result-card .result-box,
.result-card .compact-actions,
.helper-card .plain-list {
  margin: 0;
}

.compact-actions {
  gap: var(--space-2);
}

.scanner-page-grid {
  gap: var(--space-4);
}

.scanner-preview {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  overflow: hidden;
  background: #0f1417;
  aspect-ratio: 4 / 3;
  width: 100%;
  margin: 0 auto;
}

.scanner-preview video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scanner-overlay {
  position: absolute;
  inset: 14%;
  border: 3px solid #ffffff;
  border-radius: 18px;
}

.result-box,
.empty-state {
  min-height: 88px;
  padding: var(--space-3);
  border-radius: var(--radius-small);
  border: 1px solid var(--line);
  background: var(--surface-alt);
  overflow-wrap: anywhere;
}

.small-result {
  min-height: 72px;
}

.compact-actions .button,
.compact-actions button {
  width: 100%;
}

.plain-list {
  margin: 0;
  padding-left: 1.1rem;
}

.plain-list li + li {
  margin-top: var(--space-2);
}

.drop-zone {
  text-align: center;
  border-style: dashed;
  padding: var(--space-5);
  gap: var(--space-3);
  width: 100%;
}

.drop-zone.dragover {
  border-color: var(--brand);
  background: #eef8f7;
}

.drop-title {
  margin: 0;
  font-weight: 700;
}

.image-preview {
  border-radius: var(--radius-small);
  border: 1px solid var(--line);
  width: 100%;
  max-height: 420px;
  object-fit: contain;
}

.generator-form {
  display: grid;
  gap: var(--space-4);
  min-width: 0;
}

.type-switcher {
  margin: 0;
  padding: 0;
  border: 0;
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
  min-width: 0;
  width: 100%;
}

.tab-button {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--line-strong);
  min-width: 0;
  flex: 1 1 96px;
}

.tab-button.active {
  background: var(--brand);
  color: #ffffff;
  border-color: var(--brand);
}

.form-group {
  display: grid;
  gap: var(--space-1);
}

label {
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  border-radius: var(--radius-small);
  padding: var(--space-2) var(--space-3);
  color: var(--text);
  min-height: 48px;
}

textarea {
  resize: vertical;
  min-height: 144px;
}

.inline-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0 0;
}

.inline-toggle input {
  width: 20px;
  height: 20px;
}

.generator-preview {
  display: grid;
  place-items: center;
  padding: var(--space-4);
  border-radius: var(--radius-small);
  border: 1px solid var(--line);
  background: var(--surface-alt);
  min-height: 328px;
  width: 100%;
}

.generator-preview canvas,
.generator-preview img {
  width: min(100%, 280px);
  height: auto;
}

.tool-page-grid {
  gap: var(--space-4);
  min-width: 0;
}

.centered-card,
.centered-block,
.not-found-main {
  text-align: center;
}

.not-found-card {
  max-width: 640px;
}

.faq-wrap,
.prose,
.contact-form,
.generator-form,
.result-card,
.helper-card,
.image-preview-card,
.scanner-preview-wrap {
  max-width: 100%;
}

.page-grid > section,
.page-grid > aside {
  min-width: 0;
}

.result-box,
.footer-credit,
.copyright,
.footer-text,
.prose,
.lead {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.prose {
  max-width: 760px;
  min-width: 0;
}

.prose > * + * {
  margin-top: var(--space-4);
}

.prose h1 + p,
.prose h2 + p {
  margin-top: 0;
}

.hidden,
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.keep-space {
  position: static;
  width: auto;
  height: auto;
  padding: inherit;
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

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

.message-success {
  color: var(--success);
}

@media (max-width: 767px) {
  .section {
    padding: var(--space-5) 0;
  }

  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% - var(--space-1));
    right: var(--space-3);
    left: var(--space-3);
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-3);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
  }

  .site-nav a {
    width: 100%;
    padding: var(--space-2) 0;
  }

  .site-nav.is-open {
    display: flex;
  }

  .button-row,
  .compact-actions,
  .footer-links {
    flex-direction: column;
    align-items: stretch;
  }

  .footer-grid {
    gap: var(--space-4);
  }

  .button-row .button,
  .button-row button,
  .tab-button,
  .contact-form .button {
    width: 100%;
  }

  .header-inner {
    gap: var(--space-3);
  }

  .brand {
    padding-right: var(--space-2);
  }

  .scanner-main-column,
  .scanner-side-column,
  .scanner-page-grid,
  .tool-main-column,
  .tool-side-column,
  .tool-page-grid {
    gap: var(--space-3);
  }

  .hero-visual {
    min-height: 280px;
  }

  .drop-zone,
  .card,
  .generator-preview {
    padding: var(--space-4);
  }
}

@media (min-width: 768px) {
  .container {
    width: min(100% - (20px * 2), var(--container));
  }

  .section {
    padding: var(--space-6) 0;
  }

  .hero-grid,
  .page-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
  }

  .scanner-page-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.8fr);
    gap: var(--space-4);
    align-items: start;
  }

  .tool-page-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    gap: var(--space-4);
    align-items: start;
  }

  .cards-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .cards-5 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1.35fr) minmax(0, 0.7fr);
  }
}

@media (min-width: 1024px) {
  .section {
    padding: var(--space-7) 0;
  }

  .cards-5 {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .hero-grid {
    align-items: center;
  }

  .scanner-page-grid {
    gap: var(--space-5);
  }

  .tool-page-grid {
    gap: var(--space-5);
  }
}