:root {
  --coffee-dark: #3A2618;
  --coffee-medium: #8B5A2B;
  --coffee-cream: #F4E4D4;
  --coffee-light: #FFF9F2;
  --accent-warm: #B87C4B;
  --muted-text: #5F4E3C;
  --card-bg: #FFFFFFF0;
  --shadow-sm: 0 12px 28px -8px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.02);
  --shadow-hover: 0 24px 44px -12px rgba(94, 56, 20, 0.24);
  --border-radius-card: 28px;
  --border-radius-btn: 60px;
  --font-serif: 'Playfair Display', serif;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --header-bg: rgba(255, 249, 242, 0.85);
  --header-border: rgba(139, 90, 43, 0.15);
}

body.dark {
  --coffee-dark: #1E1510;
  --coffee-medium: #A67B5B;
  --coffee-cream: #2C1E16;
  --coffee-light: #1F1812;
  --accent-warm: #C28A5C;
  --muted-text: #C9B6A2;
  --card-bg: #2F231CF0;
  --shadow-sm: 0 12px 28px -8px rgba(0,0,0,0.6);
  --shadow-hover: 0 24px 44px -12px #00000080;
  --header-bg: rgba(30, 21, 16, 0.9);
  --header-border: #8B5A2B40;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--coffee-light);
  color: var(--coffee-dark);
  line-height: 1.6;
  transition: background-color 0.2s, color 0.2s;
  scroll-behavior: smooth;
}

body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 80 80'%3E%3Cpath fill='%238B5A2B' fill-opacity='0.03' d='M32 24c-4 0-8 4-8 8s4 8 8 8 8-4 8-8-4-8-8-8zm16 0c-4 0-8 4-8 8s4 8 8 8 8-4 8-8-4-8-8-8zM24 48c-4 0-8 4-8 8s4 8 8 8 8-4 8-8-4-8-8-8zm32 0c-4 0-8 4-8 8s4 8 8 8 8-4 8-8-4-8-8-8z'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: -1;
}

.container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 28px;
}

/* --- header --- */
.site-header {
  position: sticky;
  top: 20px;
  z-index: 50;
  background: var(--header-bg);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 80px;
  margin: 16px 28px 0;
  border: 1px solid var(--header-border);
  box-shadow: 0 8px 20px -8px rgba(0,0,0,0.08);
}

.navbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 20px;
}

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

.logo-img {
  height: 44px;
  width: auto;
  filter: drop-shadow(0 2px 4px #00000010);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 8px;
  margin: 0 0 0 20px;
}

.nav-links a {
  color: var(--coffee-dark);
  text-decoration: none;
  font-weight: 500;
  padding: 10px 18px;
  border-radius: 40px;
  transition: all 0.2s;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}

.nav-links a:hover {
  background: var(--coffee-medium);
  color: white;
  transform: translateY(-2px);
}

.nav-actions {
  margin-left: auto;
  display: flex;
  gap: 12px;
  align-items: center;
}

.icon-btn {
  background: transparent;
  border: 1px solid var(--coffee-medium);
  color: var(--coffee-medium);
  width: 40px;
  height: 40px;
  border-radius: 40px;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: 0.2s;
}
.icon-btn:hover {
  background: var(--coffee-medium);
  color: white;
  transform: rotate(15deg);
}

.lang-selector {
  display: flex;
  gap: 4px;
  background: rgba(139, 90, 43, 0.08);
  padding: 4px;
  border-radius: 60px;
}
.lang {
  border: none;
  background: transparent;
  padding: 6px 12px;
  border-radius: 40px;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--coffee-dark);
  transition: 0.15s;
}
.lang.active {
  background: var(--coffee-medium);
  color: white;
}

.hamburger {
  display: none;
  background: transparent;
  border: 1px solid var(--coffee-medium);
  color: var(--coffee-medium);
  font-size: 1.8rem;
  line-height: 1;
  padding: 6px 14px;
  border-radius: 60px;
  cursor: pointer;
}

/* --- main content sections --- */
.section {
  padding: 80px 0;
}

.section h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  margin-bottom: 24px;
}

.section h2 {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 32px;
  position: relative;
  display: inline-block;
}
.section h2::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 0;
  width: 70%;
  height: 4px;
  background: linear-gradient(90deg, var(--coffee-medium), #D9B382);
  border-radius: 4px;
}

/* about page list */
ul {
  list-style: none;
  margin-top: 24px;
}
ul li {
  padding: 12px 0 12px 36px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='%238B5A2B'%3E%3Cpath d='M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-2 15l-5-5 1.41-1.41L10 14.17l7.59-7.59L19 8l-9 9z'/%3E%3C/svg%3E") left center no-repeat;
  background-size: 20px;
}

/* contact form */
form {
  max-width: 700px;
  background: var(--card-bg);
  padding: 40px;
  border-radius: var(--border-radius-card);
  box-shadow: var(--shadow-sm);
  margin-top: 32px;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(139, 90, 43, 0.1);
}
label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--coffee-dark);
}
input, textarea {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid rgba(139, 90, 43, 0.3);
  border-radius: 30px;
  background: var(--coffee-light);
  font-family: var(--font-sans);
  font-size: 1rem;
  margin-bottom: 20px;
  color: var(--coffee-dark);
}
input:focus, textarea:focus {
  outline: none;
  border-color: var(--coffee-medium);
  box-shadow: 0 0 0 4px #8B5A2B30;
}
textarea {
  resize: vertical;
}
.form-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.btn {
  background: var(--coffee-medium);
  color: white;
  border: none;
  padding: 14px 34px;
  border-radius: var(--border-radius-btn);
  font-weight: 600;
  letter-spacing: 0.3px;
  text-decoration: none;
  display: inline-block;
  transition: all 0.25s;
  box-shadow: 0 10px 18px -10px var(--coffee-medium);
  border: 1px solid transparent;
  cursor: pointer;
}
.btn:hover {
  background: var(--coffee-dark);
  transform: translateY(-4px);
  box-shadow: 0 22px 28px -14px var(--coffee-dark);
}
.btn.outline {
  background: transparent;
  border: 1px solid var(--coffee-medium);
  color: var(--coffee-medium);
  box-shadow: none;
}
.btn.outline:hover {
  background: var(--coffee-medium);
  color: white;
}
.btn.small {
  padding: 10px 18px;
  font-size: 0.9rem;
}

/* recipe articles */
article {
  background: var(--card-bg);
  padding: 36px;
  border-radius: var(--border-radius-card);
  box-shadow: var(--shadow-sm);
  margin-bottom: 32px;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(139, 90, 43, 0.08);
}
article h2 {
  font-family: var(--font-serif);
  font-size: 2rem;
  margin-bottom: 16px;
}
article ol, article p {
  color: var(--muted-text);
  line-height: 1.8;
}
article li {
  margin-bottom: 8px;
}

/* footer */
.site-footer {
  background: var(--coffee-dark);
  color: #F4E4D4;
  padding: 48px 0 24px;
  border-radius: 60px 60px 0 0;
  margin-top: 60px;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}
.footer-grid a {
  color: #F4E4D4;
  text-decoration: none;
  opacity: 0.8;
  transition: 0.2s;
}
.footer-grid a:hover {
  opacity: 1;
  text-decoration: underline;
}
.copyright {
  text-align: center;
  opacity: 0.7;
  font-size: 0.9rem;
  border-top: 1px solid #F4E4D430;
  padding-top: 24px;
}

/* back to top button */
#backToTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--coffee-medium);
  color: white;
  border: none;
  width: 56px;
  height: 56px;
  border-radius: 56px;
  font-size: 2rem;
  cursor: pointer;
  box-shadow: 0 12px 24px -8px #3A2618;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 0.2s;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  z-index: 90;
}
#backToTop.visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
#backToTop:hover {
  background: var(--coffee-dark);
  transform: translateY(-6px);
}

/* responsive */
@media (max-width: 1000px) {
  .section h2::after { left: 50%; transform: translateX(-50%); width: 120px; }
  .section h2 { text-align: center; display: block; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .site-header { margin: 12px 16px; }
  .nav-links { display: none; }
  .hamburger { display: block; }
  .nav-links.show {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 16px;
    right: 16px;
    background: var(--header-bg);
    backdrop-filter: blur(20px);
    border-radius: 40px;
    padding: 20px;
    border: 1px solid var(--coffee-medium);
    box-shadow: var(--shadow-hover);
  }
  .footer-grid { grid-template-columns: 1fr; }
}

/* dark mode tweaks */
body.dark .btn.outline {
  color: var(--coffee-cream);
  border-color: var(--coffee-cream);
}
body.dark input, body.dark textarea {
  background: #2F231C;
  color: #F4E4D4;
  border-color: #8B5A2B60;
}