:root {
  --bg: #f7f8fa;
  --ink: #17202a;
  --muted: #647080;
  --line: #d9dee7;
  --panel: #ffffff;
  --primary: #0f766e;
  --primary-dark: #0b5f59;
  --accent: #d97706;
  --soft: #eef6f4;
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header,
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(247, 248, 250, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand {
  color: var(--ink);
  font-size: 20px;
  font-weight: 800;
}

.nav,
.admin-nav {
  display: flex;
  gap: 16px;
  color: var(--muted);
  font-weight: 650;
}

.nav a:hover,
.admin-nav a:hover {
  color: var(--primary);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 40px;
  align-items: center;
  min-height: 72vh;
  padding: 54px clamp(20px, 5vw, 72px);
  background:
    linear-gradient(110deg, rgba(15, 118, 110, 0.12), rgba(217, 119, 6, 0.08)),
    var(--bg);
}

.hero h1,
.page-hero h1,
.download-box h1 {
  max-width: 720px;
  margin: 0 0 18px;
  font-size: clamp(40px, 6vw, 76px);
  line-height: 1;
  letter-spacing: 0;
}

.hero p,
.page-hero p,
.download-box p {
  max-width: 680px;
  color: var(--muted);
  font-size: 18px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  font: inherit;
  font-weight: 750;
  cursor: pointer;
}

.button.primary {
  border-color: var(--primary);
  background: var(--primary);
  color: white;
}

.button.primary:hover {
  background: var(--primary-dark);
}

.button.danger {
  border-color: var(--danger);
  background: var(--danger);
  color: white;
}

.button.danger:hover {
  background: #8f1d14;
}

.button.small {
  min-height: 34px;
  padding: 6px 12px;
  font-size: 14px;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.65;
}

.button.wide {
  width: 100%;
}

.qr-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.qr-card,
.download-box,
.admin-card,
.form-panel,
.login-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 16px 42px rgba(23, 32, 42, 0.08);
}

.qr-card {
  padding: 20px;
}

.qr-card img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.qr-card h2 {
  margin: 16px 0 6px;
  font-size: 22px;
}

.qr-card p,
.muted {
  color: var(--muted);
}

.page-hero,
.download-page {
  padding: 72px clamp(20px, 5vw, 72px);
}

.page-hero {
  background: var(--soft);
}

.content-band {
  padding: 44px clamp(20px, 5vw, 72px) 72px;
}

.prose {
  max-width: 860px;
  font-size: 18px;
}

.prose h2 {
  font-size: 30px;
}

.download-page {
  display: grid;
  min-height: 70vh;
  place-items: center;
}

.download-box {
  width: min(100%, 520px);
  padding: 32px;
}

.site-footer {
  justify-content: center;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.footer-link {
  color: var(--primary);
  font-weight: 750;
}

.footer-link:hover {
  color: var(--primary-dark);
}

.admin-body {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  min-height: 100vh;
}

.admin-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 24px;
  border-right: 1px solid var(--line);
  background: var(--panel);
}

.admin-nav {
  flex-direction: column;
}

.admin-main {
  padding: 32px;
}

.admin-title {
  margin-bottom: 24px;
}

.admin-title h1 {
  margin: 0 0 4px;
  font-size: 34px;
}

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

.admin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.admin-card {
  display: grid;
  gap: 6px;
  min-height: 110px;
  padding: 20px;
}

.admin-card span {
  color: var(--muted);
}

.form-panel,
.login-card {
  display: grid;
  gap: 18px;
  max-width: 820px;
  padding: 24px;
}

.upload-form {
  grid-template-columns: 180px minmax(0, 1fr) auto;
  align-items: end;
  max-width: none;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-weight: 700;
}

input,
textarea,
select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

textarea {
  resize: vertical;
}

.table-section {
  margin-top: 28px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}

th {
  background: #f0f3f7;
  font-size: 13px;
  text-transform: uppercase;
}

td input {
  min-width: 360px;
}

.messages {
  display: grid;
  gap: 10px;
  margin-bottom: 20px;
}

.message {
  border-radius: 8px;
  padding: 10px 12px;
  background: #e8f5e9;
  color: #17633a;
  font-weight: 700;
}

.message.error {
  background: #fff1f0;
  color: var(--danger);
}

.login-page {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(100%, 420px);
}

.link-button {
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--danger);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

@media (max-width: 840px) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    flex-wrap: wrap;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .qr-panel {
    grid-template-columns: 1fr;
  }

  .admin-body {
    grid-template-columns: 1fr;
  }

  .admin-sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .upload-form {
    grid-template-columns: 1fr;
  }
}