* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #fcfbf8;
  --surface: #ffffff;
  --surface-soft: #f6f3ef;
  --surface-accent: #f4efeb;
  --text: #1f1a1a;
  --muted: #6b6161;
  --line: #ddd7d2;
  --line-strong: #cfc7c1;
  --brand: #d62828;
  --brand-dark: #b71f1f;
  --brand-soft: #f9ece8;
  --map: #ffffff;
  --map-text: #5f5656;
  --radius: 22px;
  --radius-sm: 16px;
  --shadow-none: none;
  --max-width: 1000px;
  --transition: 220ms ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Open Sans', Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

/* HEADER */
.header {
  position: relative;
  text-align: center;
  padding: 2rem 1rem 2.8rem;
  background: linear-gradient(180deg, #ffffff 0%, #fbf8f5 100%);
}

.header::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 10px;
  background: linear-gradient(90deg, #d62828 0 28%, #f4d000 28% 52%, #0f5597 52% 76%, #3c774b 76% 100%);
}

.header-nav {
  text-align: left;
  margin-bottom: 0.75rem;
}

.back-link {
  color: var(--brand);
  text-decoration: none;
  font-weight: 700;
  margin-left: 1rem;
  transition: color var(--transition);
}

.back-link:hover {
  color: var(--brand-dark);
  text-decoration: underline;
}

.logo {
  width: 148px;
  height: auto;
  margin: 0 auto;
}

h1 {
  font-size: clamp(1.9rem, 3vw, 2.4rem);
  line-height: 1.15;
  margin-top: 0.85rem;
  margin-bottom: 0.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

h2 {
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
  color: var(--text);
  margin-top: 0.65rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.45rem);
  margin-bottom: 1rem;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.ad-dates {
  color: var(--muted);
  margin-top: 0.8rem;
  margin-bottom: 0.8rem;
  font-size: 0.98rem;
  font-weight: 400;
}

/* STORE LIST */
.store-list {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem 0;
}

.stores {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.store-card {
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-none);
  padding: 1.25rem;
  text-align: center;
  transition:
    transform var(--transition),
    border-color var(--transition),
    background-color var(--transition);
}

.store-card:hover {
  transform: translateY(-2px);
  background-color: #fffdfb;
  border-color: var(--line-strong);
}

.store-card h4 {
  margin-bottom: 0.45rem;
  color: var(--text);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.store-card p {
  color: var(--muted);
  font-size: 0.94rem;
  margin-bottom: 0.95rem;
}

.btn,
.btn-map {
  display: inline-block;
  padding: 0.72rem 1.15rem;
  border-radius: 999px;
  text-decoration: none;
  margin: 0.24rem;
  font-weight: 700;
  font-size: 0.95rem;
  transition:
    background-color var(--transition),
    color var(--transition),
    border-color var(--transition),
    transform var(--transition);
  border: 1px solid transparent;
}

.btn {
  background-color: #fff;
  color: var(--brand);
  border: 1px solid var(--brand);
}

.btn:hover {
  background-color: var(--brand);
  color: #fff;
  transform: translateY(-1px);
}

.btn-map {
  background-color: var(--map);
  color: var(--map-text);
  border-color: var(--line);
}

.btn-map:hover {
  background-color: var(--surface-soft);
  border-color: var(--line-strong);
  color: var(--text);
  transform: translateY(-1px);
}

/* REWARDS */
.rewards {
  background: var(--surface);
  margin-top: 2.4rem;
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-none);
}

.rewards-content {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-direction: row;
}

.rewards-image {
  width: 160px;
  height: auto;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  border: none;
}

.rewards-text h3 {
  color: var(--text);
  font-size: 1.35rem;
  margin-bottom: 1rem;
}

.rewards-text p {
  font-size: 1rem;
  color: var(--text);
  line-height: 1.6;
}

/* Responsive: rewards section layout tweaks */
@media (max-width: 768px) {
  .rewards-content {
    flex-direction: column;
    text-align: center;
  }

  .rewards-image {
    width: 140px;
  }
}

.company-link {
  text-align: center;
  margin-top: 2.8rem;
  margin-bottom: 0.5rem;
}

.company-link a {
  display: inline-block;
  background-color: var(--brand);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  padding: 0.72rem 1.2rem;
  border-radius: 999px;
  transition: background-color var(--transition), transform var(--transition);
}

.company-link a:hover {
  background-color: var(--brand-dark);
  transform: translateY(-1px);
}

.company-link {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}

/* AD GALLERY */
.ad-gallery {
  max-width: var(--max-width);
  margin: 2rem auto 0;
  text-align: center;
  padding: 0 1rem;
}

.pdf-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.2rem;
  margin-top: 1.5rem;
}

.pdf-grid a {
  display: block;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.8rem;
  transition:
    transform var(--transition),
    border-color var(--transition),
    background-color var(--transition);
}

.pdf-grid a:hover {
  transform: translateY(-2px);
  background-color: #fffdfb;
  border-color: var(--line-strong);
}

.pdf-grid img {
  width: 100%;
  border-radius: calc(var(--radius-sm) - 2px);
  border: 1px solid #f5f5f5; /* lighter than outer border */
  box-shadow: none;
  transition: transform var(--transition);
}

.pdf-grid a:hover img {
  transform: scale(1.01);
}

.pdf-grid a,
.pdf-grid a:hover,
.pdf-grid a:visited {
  text-decoration: none;
  color: inherit;
}

/* PDF OVERLAY */
.pdf-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(24, 19, 21, 0.86);
  justify-content: center;
  align-items: center;
  z-index: 1000;
  padding: 1rem;
}

.pdf-container {
  width: min(1100px, 96%);
  height: 92%;
  background: #fff;
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
}

#pdf-frame {
  width: 100%;
  height: 100%;
}

.close-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  background-color: var(--brand);
  color: #fff;
  border: none;
  padding: 0.78rem 1.05rem;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.01em;
  box-shadow: none;
  transition: background-color var(--transition), transform var(--transition);
}

.close-btn:hover {
  background-color: var(--brand-dark);
  transform: translateY(-1px);
}

/* FOOTER */
.footer {
  text-align: center;
  padding: 1.5rem 1rem;
  background-color: #fff;
  border-top: 1px solid var(--line);
  margin-top: 2.5rem;
  color: var(--muted);
  font-size: 0.85rem;
}

/* Small-screen tweaks */
@media (max-width: 600px) {
  .logo {
    width: 122px;
  }

  h1 {
    font-size: 1.65rem;
  }

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

  .store-card,
  .rewards,
  .qr-section,
  .pdf-grid a {
    border-radius: 18px;
  }

  .btn,
  .btn-map {
    width: calc(100% - 0.5rem);
    max-width: 260px;
  }
}

/* Top back link under dates */
.back-link-top {
  display: inline-block;
  color: var(--brand);
  font-weight: 700;
  text-decoration: none;
  font-size: 0.98rem;
  margin-top: 0.95rem;
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.back-link-top:hover {
  color: var(--brand-dark);
  text-decoration: none;
  border-color: var(--brand-dark);
}

/* Page label under thumbnails */
.page-label {
  color: var(--muted);
  font-weight: 700;
  margin-top: 0.8rem;
  margin-bottom: 0.2rem;
  font-size: 0.92rem;
  text-decoration: none;
}

/* QR Section */
.qr-section {
  background-color: var(--surface);
  margin: 2.4rem auto;
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: none;
}

.qr-content {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.qr-code {
  width: 160px;
  height: auto;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  border: none;
  background: transparent;
  padding: 0;
}

.qr-text h3 {
  color: var(--text);
  font-size: 1.35rem;
  margin-bottom: 1rem;
}

.qr-text p {
  font-size: 1rem;
  color: var(--text);
  line-height: 1.6;
}

/* Responsive: QR section layout tweaks */
@media (max-width: 768px) {
  .qr-content {
    flex-direction: column;
    text-align: center;
  }

  .qr-code {
    width: 140px;
  }
}