/* ============================================
   Ruhan & Daniel Wedding — Design System
   Inspired by House of CB
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;0,700;1,300;1,400;1,500&family=Montserrat:wght@300;400;500;600&display=swap');

/* --- Variables --- */
:root {
  --bg-primary: #FDF2F0;
  --bg-white: #FFFFFF;
  --bg-section-alt: #FBE9E6;
  --text-primary: #5C1A1B;
  --text-secondary: #8B4547;
  --text-light: #A66A6C;
  --accent: #C4918E;
  --accent-light: #E8C5C3;
  --border: #E0BFBD;
  --button-bg: #5C1A1B;
  --button-hover: #7A2E30;
  --white: #FFFFFF;
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Montserrat', 'Helvetica Neue', sans-serif;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  font-weight: 300;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  letter-spacing: 0.04em;
}

h2 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  letter-spacing: 0.03em;
  margin-bottom: 1rem;
}

h3 {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 500;
}

p {
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: rgba(253, 242, 240, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: transform 0.3s ease;
}

.nav-logo-text {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-primary);
  transition: color 0.3s;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

.nav-links a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.lang-toggle {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  background: none;
  border: 1px solid var(--text-primary);
  color: var(--text-primary);
  padding: 0.35rem 0.75rem;
  cursor: pointer;
  transition: all 0.3s;
}

.lang-toggle:hover {
  background: var(--text-primary);
  color: var(--white);
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--text-primary);
  transition: all 0.3s;
}

/* --- Sections --- */
section {
  padding: 5rem 2rem;
}

.section-divider {
  width: 60px;
  height: 1px;
  background: var(--accent);
  margin: 0 auto 2rem;
}

.section-subtitle {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-style: italic;
  color: var(--text-light);
  text-align: center;
  margin-bottom: 3rem;
}

.container {
  max-width: 900px;
  margin: 0 auto;
}

.text-center {
  text-align: center;
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  overflow: hidden;
  background: linear-gradient(180deg, #FDF2F0 0%, #F5E1DE 40%, #EDD5D1 70%, #FDF2F0 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center, transparent 0%, rgba(253,242,240,0.4) 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-invite {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-style: italic;
  color: var(--text-light);
  letter-spacing: 0.04em;
  margin-bottom: 2rem;
}

.hero-hands {
  width: 320px;
  height: auto;
  margin: 0.5rem auto 1.5rem;
}

.hero-names {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.hero-ampersand {
  font-style: italic;
  font-weight: 300;
  font-size: 0.6em;
  margin: 0 0.3em;
  color: var(--accent);
}

.hero-invite-line {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-style: italic;
  color: var(--text-light);
  letter-spacing: 0.04em;
  margin-top: 0.5rem;
}

.hero-divider {
  width: 50px;
  height: 1px;
  background: var(--accent);
  margin: 2rem auto;
  opacity: 0.6;
}

.hero-date {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.hero-venue {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--text-light);
  margin-top: 0.6rem;
  letter-spacing: 0.04em;
}

.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  animation: float 2.5s ease-in-out infinite;
  opacity: 0.5;
}

.scroll-indicator span {
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-light);
}

.scroll-indicator svg {
  width: 28px;
  stroke: var(--text-light);
  stroke-width: 1.5;
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* --- Gallery / Slideshow --- */
.gallery {
  background: var(--bg-white);
  padding-bottom: 4rem;
}

.slideshow {
  position: relative;
  max-width: 700px;
  margin: 2rem auto 0;
  overflow: hidden;
}

.slideshow-track {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.slide {
  min-width: 100%;
  position: relative;
}

.slide img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  display: block;
}

.slide-placeholder {
  width: 100%;
  height: 420px;
  background: linear-gradient(135deg, var(--bg-section-alt) 0%, var(--accent-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-style: italic;
  color: var(--text-light);
}

.slide-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(253, 242, 240, 0.85);
  border: 1px solid var(--border);
  color: var(--text-primary);
  width: 44px;
  height: 44px;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
  backdrop-filter: blur(4px);
}

.slide-btn:hover {
  background: var(--text-primary);
  color: var(--white);
}

.slide-prev {
  left: 1rem;
}

.slide-next {
  right: 1rem;
}

.slide-dots {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  margin-top: 1.2rem;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  background: transparent;
  cursor: pointer;
  padding: 0;
  transition: all 0.3s;
}

.dot.active {
  background: var(--text-primary);
  border-color: var(--text-primary);
}

@media (max-width: 768px) {
  .slide img,
  .slide-placeholder {
    height: 280px;
  }

  .slide-btn {
    width: 36px;
    height: 36px;
    font-size: 1.2rem;
  }
}

/* --- Programme / Timeline --- */
.programme {
  background: var(--bg-white);
}

.timeline {
  position: relative;
  max-width: 600px;
  margin: 0 auto;
  padding: 1rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  background: var(--accent-light);
  transform: translateX(-50%);
}

.timeline-item {
  display: grid;
  grid-template-columns: 1fr 20px 1fr;
  gap: 1.5rem;
  align-items: center;
  margin-bottom: 2.5rem;
  position: relative;
}

.timeline-time {
  text-align: right;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
}

.timeline-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-white);
  box-shadow: 0 0 0 2px var(--accent-light);
  z-index: 1;
  justify-self: center;
}

.timeline-event {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--text-primary);
}

/* --- Venue --- */
.venue {
  position: relative;
  background: var(--bg-primary);
  overflow: hidden;
}

.venue-backdrop {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.venue-backdrop img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
  filter: sepia(10%) saturate(50%) brightness(0.7);
}

.venue .container,
.venue .venue-card {
  position: relative;
  z-index: 1;
}

.venue-card {
  max-width: 700px;
  margin: 0 auto;
  background: var(--bg-white);
  border: 1px solid var(--border);
  padding: 3rem;
  text-align: center;
}

.venue-name {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.venue-location {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
}

.venue-description {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.8;
  max-width: 500px;
  margin: 0 auto;
}

.venue-map {
  width: 100%;
  height: 300px;
  margin-top: 2rem;
  border: 1px solid var(--border);
  filter: grayscale(30%) sepia(10%);
}

/* --- Dress Code --- */
.dresscode {
  background: var(--bg-white);
}

.palette-grid {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin: 2rem auto;
  max-width: 600px;
}

.palette-swatch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.swatch-color {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 2px solid var(--border);
  transition: transform 0.3s;
}

.swatch-color:hover {
  transform: scale(1.1);
}

.swatch-label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  text-align: center;
}

.dresscode-note {
  text-align: center;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-style: italic;
  color: var(--text-light);
  max-width: 500px;
  margin: 2rem auto 0;
  line-height: 1.8;
}

/* --- RSVP --- */
.rsvp {
  background: var(--bg-primary);
}

.rsvp-form {
  max-width: 550px;
  margin: 0 auto;
  background: var(--bg-white);
  border: 1px solid var(--border);
  padding: 3rem 2.5rem;
}

.form-group {
  margin-bottom: 1.8rem;
}

.form-group {
  text-align: center;
  margin-bottom: 2.5rem;
}

.form-group label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.6rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--text-primary);
  background: var(--bg-primary);
  border: 1px solid var(--border);
  outline: none;
  transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6rem;
  margin-top: 0.3rem;
  justify-content: center;
  text-align: center;
}

.radio-option {
  display: inline-flex;
  align-items: center;
  gap: 1.8rem;
  cursor: pointer;
  line-height: 1;
}

.radio-option input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--accent);
  border-radius: 50%;
  cursor: pointer;
  position: relative;
  transition: border-color 0.3s;
  flex-shrink: 0;
  margin: 0;
  vertical-align: middle;
}

.radio-option input[type="radio"]:checked {
  border-color: var(--text-primary);
}

.radio-option input[type="radio"]:checked::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-primary);
}

.radio-option span {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.form-group.hidden {
  display: none;
}

.btn-submit {
  width: 100%;
  padding: 1rem;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  background: var(--button-bg);
  color: var(--white);
  border: none;
  cursor: pointer;
  transition: background 0.3s;
  margin-top: 1rem;
}

.btn-submit:hover {
  background: var(--button-hover);
}

.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-message {
  text-align: center;
  font-size: 0.85rem;
  margin-top: 1rem;
  padding: 0.8rem;
  display: none;
}

.form-message.success {
  display: block;
  color: #2d6a4f;
  background: #d8f3dc;
  border: 1px solid #b7e4c7;
}

.form-message.error {
  display: block;
  color: #9b2226;
  background: #fee2e2;
  border: 1px solid #fca5a5;
}

/* --- Footer --- */
.footer {
  background: var(--text-primary);
  color: var(--accent-light);
  text-align: center;
  padding: 3rem 2rem;
}

.footer-logo-text {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--accent-light);
  display: block;
  margin-bottom: 0.8rem;
}

.footer-names {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 300;
  letter-spacing: 0.06em;
  margin-bottom: 0.3rem;
}

.footer-date {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.footer-link {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-light);
  border: 1px solid var(--accent-light);
  padding: 0.6rem 1.5rem;
  transition: all 0.3s;
}

.footer-link:hover {
  background: var(--accent-light);
  color: var(--text-primary);
}

/* --- Beijing Travel Guide --- */
.travel-hero {
  position: relative;
  min-height: 35vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, #FDF2F0 0%, #F5E1DE 100%);
  padding-top: 4rem;
  padding-bottom: 1rem;
  overflow: hidden;
}

.travel-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.travel-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 0%;
  opacity: 0.4;
  filter: sepia(10%) saturate(50%) brightness(0.55);
}

.travel-hero .container {
  position: relative;
  z-index: 1;
}

.travel-hero h1 {
  color: var(--text-primary);
}


.travel-section {
  padding: 3rem 2rem;
}

.travel-section:nth-child(even) {
  background: var(--bg-white);
}

.travel-card {
  max-width: 700px;
  margin: 0 auto;
}

.travel-card h3 {
  text-align: center;
}

.travel-card h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.travel-card p,
.travel-card li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.9;
}

.travel-card ul {
  list-style: none;
  padding: 0;
}

.travel-card ul li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--accent-light);
}

.travel-card ul li:last-child {
  border-bottom: none;
}

.travel-tip {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1rem;
  text-align: left;
}

.travel-card ul li {
  text-align: left;
}

.travel-card p {
  text-align: left;
}

.travel-tip-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-light);
  border-radius: 50%;
  font-size: 0.9rem;
}

.app-links {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.app-links a {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-primary);
  border: 1px solid var(--border);
  padding: 0.3rem 0.8rem;
  transition: all 0.3s;
}

.app-links a:hover {
  background: var(--text-primary);
  color: var(--white);
}

.travel-section-with-bg {
  position: relative;
  overflow: hidden;
}

.travel-section-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.travel-section-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
  filter: sepia(10%) saturate(40%) brightness(0.5);
}

.travel-section-with-bg .travel-card {
  position: relative;
  z-index: 1;
}

.travel-section-with-bg .travel-card h3 {
  color: var(--text-primary);
  font-weight: 500;
}

.travel-section-with-bg .travel-card p {
  color: var(--text-primary);
  font-weight: 400;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-primary);
  border: 1px solid var(--text-primary);
  padding: 0.6rem 1.5rem;
  transition: all 0.3s;
  margin-top: 2rem;
}

.back-link:hover {
  background: var(--text-primary);
  color: var(--white);
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(253, 242, 240, 0.98);
    padding: 1.5rem 2rem;
    gap: 1.2rem;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-hamburger {
    display: flex;
  }

  .nav-hamburger.open span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
  }
  .nav-hamburger.open span:nth-child(2) {
    opacity: 0;
  }
  .nav-hamburger.open span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
  }

  section {
    padding: 3.5rem 1.5rem;
  }

  .hero-logo {
    width: 130px;
    height: 130px;
  }

  /* Timeline mobile: centered, no line/dots */
  .timeline::before {
    display: none;
  }

  .timeline-item {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    text-align: center;
  }

  .timeline-time {
    text-align: center;
  }

  .timeline-dot {
    display: none;
  }

  .timeline-event {
    text-align: center;
  }

  .palette-grid {
    gap: 1rem;
  }

  .swatch-color {
    width: 60px;
    height: 60px;
  }

  .rsvp-form {
    padding: 2rem 1.5rem;
  }

  .venue-card {
    padding: 2rem 1.5rem;
  }

  .radio-group {
    flex-wrap: wrap;
    gap: 6rem;
  }
}

@media (max-width: 480px) {
  .hero-names {
    font-size: 2.2rem;
  }

  .palette-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
  }

  .swatch-color {
    width: 55px;
    height: 55px;
  }
}