/* ==========================================================================
   SingaporeBookHaven — Stylesheet
   Color Scheme: deep emerald, warm cream, muted gold, dark brown, soft beige
   ========================================================================== */

:root {
  --color-emerald: #1f4d3f;
  --color-emerald-dark: #163a30;
  --color-cream: #faf5e9;
  --color-beige: #f0e6d2;
  --color-gold: #c8a24a;
  --color-brown: #3b2a20;
  --color-text: #33281f;
  --color-white: #ffffff;

  --radius: 8px;
  --transition: 0.25s ease;
}

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

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', Arial, sans-serif;
  color: var(--color-text);
  background-color: var(--color-cream);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: 'Playfair Display', Georgia, serif;
  color: var(--color-emerald-dark);
  line-height: 1.25;
}

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

a {
  color: var(--color-emerald);
  text-decoration: none;
}

a:hover {
  color: var(--color-gold);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-gold);
  margin-bottom: 0.5rem;
}

.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-lead.center {
  max-width: 640px;
}

/* ============== Buttons ============== */
.btn {
  display: inline-block;
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

.btn-primary {
  background-color: var(--color-emerald);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-emerald-dark);
  color: var(--color-white);
}

.btn-secondary {
  background-color: transparent;
  border-color: var(--color-emerald);
  color: var(--color-emerald);
}

.btn-secondary:hover {
  background-color: var(--color-emerald);
  color: var(--color-white);
}

.btn-small {
  padding: 0.55rem 1.2rem;
  font-size: 0.85rem;
}

/* ============== Layout Helpers ============== */
.section {
  padding: 4.5rem 1.5rem;
}

.section-inner {
  max-width: 1140px;
  margin: 0 auto;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.two-col.reverse .col-media {
  order: 2;
}

.two-col.reverse .col-text {
  order: 1;
}

.section-about {
  background-color: var(--color-beige);
}

.section-authors {
  background-color: var(--color-beige);
}

.checklist {
  list-style: none;
  margin-top: 1rem;
}

.checklist li {
  padding-left: 1.6rem;
  position: relative;
  margin-bottom: 0.6rem;
}

.checklist li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--color-gold);
  font-weight: 700;
}

/* ============== Section photos (16:9) ============== */
.section-photo {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
}

/* ============== Header / Navigation ============== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-cream);
  border-bottom: 1px solid var(--color-beige);
}

.header-inner {
  max-width: 1140px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  position: relative;
}

.brand {
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--color-emerald-dark);
}

.nav-menu ul {
  list-style: none;
  display: flex;
  gap: 1.8rem;
}

.nav-menu a {
  font-weight: 500;
  color: var(--color-brown);
}

.nav-menu a:hover {
  color: var(--color-emerald);
}

.burger-checkbox {
  display: none;
}

.burger-icon {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 0.4rem;
}

.burger-icon span {
  width: 26px;
  height: 3px;
  background-color: var(--color-emerald-dark);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ============== Hero ============== */
.hero {
  max-width: 1140px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  top: -2rem;
  bottom: -2rem;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  z-index: -1;
  background:
    linear-gradient(105deg, rgba(250, 245, 233, 0.92) 42%, rgba(250, 245, 233, 0.55) 100%),
    url("images/SingaporeBookHaven-background.jpg") center / cover no-repeat;
}

.hero-lead {
  margin: 1.2rem 0 1.8rem;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ============== Genres ============== */
.section-genres {
  background-color: var(--color-cream);
}

.genre-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.genre-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-beige);
  border-radius: var(--radius);
  padding: 1.6rem;
}

.genre-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
  color: var(--color-emerald);
}

.genre-media {
  margin-top: 2.5rem;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* ============== Reviews ============== */
.section-reviews {
  background-color: var(--color-beige);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.review-card {
  background-color: var(--color-white);
  border-left: 4px solid var(--color-gold);
  border-radius: var(--radius);
  padding: 1.6rem;
}

.review-card p {
  font-style: italic;
  margin-bottom: 1rem;
}

.review-author {
  font-weight: 600;
  color: var(--color-emerald-dark);
  font-style: normal;
}

/* ============== Contact ============== */
.section-contact {
  background-color: var(--color-cream);
}

.contact-address {
  margin-top: 1.5rem;
  font-style: normal;
  line-height: 1.8;
}

form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.form-field label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
  color: var(--color-brown);
}

.form-field input[type="text"],
.form-field input[type="email"],
.form-field input[type="tel"],
.form-field textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 1px solid #cbbfa4;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.95rem;
  background-color: var(--color-white);
  color: var(--color-text);
}

.form-field input:focus,
.form-field textarea:focus {
  outline: 2px solid var(--color-gold);
  outline-offset: 1px;
}

.form-field-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

.form-field-checkbox input {
  margin-top: 0.3rem;
}

.form-field-checkbox label {
  font-weight: 400;
  font-size: 0.9rem;
}

/* ============== Footer ============== */
.site-footer {
  background-color: var(--color-emerald-dark);
  color: var(--color-cream);
  padding: 3rem 1.5rem 1.5rem;
}

.footer-inner {
  max-width: 1140px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.footer-brand {
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
  color: var(--color-gold);
}

.footer-col h3 {
  color: var(--color-cream);
  font-size: 1rem;
  margin-bottom: 0.8rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.5rem;
}

.footer-col a {
  color: var(--color-beige);
}

.footer-col a:hover {
  color: var(--color-gold);
}

.footer-col address {
  font-style: normal;
  color: var(--color-beige);
  line-height: 1.8;
}

.footer-bottom {
  max-width: 1140px;
  margin: 2rem auto 0;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(250, 245, 233, 0.15);
  font-size: 0.85rem;
  color: var(--color-beige);
  text-align: center;
}

/* ============== Cookie Banner ============== */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background-color: var(--color-brown);
  color: var(--color-cream);
  padding: 1.2rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.cookie-banner p {
  flex: 1 1 480px;
  font-size: 0.9rem;
}

.cookie-banner a {
  color: var(--color-gold);
  text-decoration: underline;
}

/* ============== Modal ============== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(59, 42, 32, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 300;
  padding: 1.5rem;
}

.modal-box {
  background-color: var(--color-white);
  border-radius: var(--radius);
  padding: 2rem;
  max-width: 420px;
  text-align: center;
}

.modal-box h3 {
  margin-bottom: 0.8rem;
}

.modal-box p {
  margin-bottom: 1.5rem;
}

/* ==========================================================================
   Responsive — Burger Menu Breakpoint 900px (pure CSS, checkbox hack)
   ========================================================================== */
@media (max-width: 900px) {
  .burger-icon {
    display: flex;
    z-index: 110;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-cream);
    border-bottom: 1px solid var(--color-beige);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }

  .nav-menu ul {
    flex-direction: column;
    gap: 0;
    padding: 0 1.5rem;
  }

  .nav-menu ul li {
    border-top: 1px solid var(--color-beige);
  }

  .nav-menu ul li a {
    display: block;
    padding: 1rem 0;
  }

  .burger-checkbox:checked ~ .nav-menu {
    max-height: 60vh;
    overflow-y: auto;
  }

  .burger-checkbox:checked ~ .burger-icon span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .burger-checkbox:checked ~ .burger-icon span:nth-child(2) {
    opacity: 0;
  }

  .burger-checkbox:checked ~ .burger-icon span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 3rem;
    padding-bottom: 3rem;
  }

  .hero::before {
    top: 0;
    bottom: 0;
    background:
      linear-gradient(180deg, rgba(250, 245, 233, 0.94) 0%, rgba(250, 245, 233, 0.88) 55%, rgba(250, 245, 233, 0.82) 100%),
      url("images/SingaporeBookHaven-background.jpg") center 35% / cover no-repeat;
  }

  .hero-media {
    max-width: 520px;
    margin: 0 auto;
    width: 100%;
  }

  .hero-lead {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .two-col,
  .two-col.reverse .col-media,
  .two-col.reverse .col-text {
    order: initial;
  }

  .two-col {
    grid-template-columns: 1fr;
  }

  .genre-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-inner {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .hero {
    padding-top: 2.5rem;
    padding-bottom: 2.5rem;
  }

  .hero::before {
    background:
      linear-gradient(180deg, rgba(250, 245, 233, 0.96) 0%, rgba(250, 245, 233, 0.9) 100%),
      url("images/SingaporeBookHaven-background.jpg") center 30% / cover no-repeat;
  }

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

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .cookie-banner {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }
}