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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Montserrat', sans-serif;
  background: #050b14;
  color: #ffffff;
  overflow-x: hidden;
}

section {
  padding: 100px 8%;
}

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

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 999;
  padding: 22px 8%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(5, 11, 20, 0.45);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.brand {
  color: #ffffff;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 1px;
}

.navbar nav {
  display: flex;
  gap: 28px;
}

.navbar nav a {
  color: #ffffff;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
}

.navbar nav a:hover {
  color: #ff1493;
}

.hero {
  min-height: 100vh;
  position: relative;
  background:
    linear-gradient(rgba(0,0,0,0.35), rgba(0,0,0,0.7)),
    url('../images/hero-yacht-party-natalie-40.webp');
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 120px;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top, rgba(255, 20, 147, 0.28), transparent 45%),
    linear-gradient(to bottom, transparent, #050b14);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 20px;
  padding: 10px 22px;
  border-radius: 100px;
  color: #ffffff;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.18);
  backdrop-filter: blur(10px);
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: 0.78rem;
  font-weight: 700;
}

.hero h1 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(4rem, 10vw, 8rem);
  line-height: 0.95;
  color: #ffffff;
  text-shadow: 0 20px 50px rgba(0,0,0,0.45);
}

.hero h2 {
  margin-top: 10px;
  font-size: clamp(1.8rem, 5vw, 3.5rem);
  color: #ff5fbd;
  text-transform: uppercase;
  letter-spacing: 5px;
  font-weight: 900;
}

.hero p {
  max-width: 760px;
  margin: 28px auto 38px;
  color: rgba(255,255,255,0.88);
  font-size: 1.15rem;
  line-height: 1.8;
}

.btn-primary {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  padding: 16px 34px;
  border-radius: 100px;
  background: linear-gradient(135deg, #ff1493, #ff69b4);
  color: #ffffff;
  text-decoration: none;
  font-weight: 800;
  border: none;
  cursor: pointer;
  box-shadow: 0 18px 45px rgba(255, 20, 147, 0.35);
  transition: 0.3s ease;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 25px 55px rgba(255, 20, 147, 0.45);
}

.intro {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 60px;
  align-items: center;
  background:
    radial-gradient(circle at top left, rgba(255,20,147,0.18), transparent 35%),
    #050b14;
}

.intro-text span,
.section-title span,
.rsvp-card > span {
  color: #ff5fbd;
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: 0.85rem;
  font-weight: 800;
}

.intro-text h2,
.section-title h2,
.rsvp-card h2,
.instagram-section h2 {
  margin: 18px 0 25px;
  font-family: 'Playfair Display', serif;
  font-size: clamp(2.3rem, 5vw, 4.2rem);
  line-height: 1.1;
}

.intro-text p {
  margin-bottom: 22px;
  color: rgba(255,255,255,0.78);
  font-size: 1.05rem;
  line-height: 1.9;
}

.intro-text strong {
  color: #ffffff;
  font-size: 1.15rem;
  line-height: 1.8;
}

.intro-image img {
  border-radius: 38px;
  min-height: 580px;
  object-fit: cover;
  box-shadow: 0 35px 80px rgba(0,0,0,0.45);
  border: 1px solid rgba(255,255,255,0.1);
}

.details {
  background:
    linear-gradient(rgba(5,11,20,0.85), rgba(5,11,20,0.95)),
    url('../images/natalie-birthday-beach-vibes.webp');
  background-size: cover;
  background-position: center;
}

.section-title {
  text-align: center;
  max-width: 850px;
  margin: 0 auto 65px;
}

.details-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
}

.detail-card {
  padding: 35px;
  border-radius: 28px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.11);
  backdrop-filter: blur(14px);
  text-align: center;
  transition: 0.3s ease;
}

.detail-card:hover {
  transform: translateY(-8px);
  border-color: rgba(255,20,147,0.45);
}

.detail-card span {
  display: block;
  font-size: 2.2rem;
  margin-bottom: 18px;
}

.detail-card h3 {
  margin-bottom: 12px;
  color: #ff8ccd;
  font-size: 1.15rem;
}

.detail-card p {
  color: rgba(255,255,255,0.82);
  line-height: 1.7;
}

.gallery {
  background: #050b14;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.gallery-grid img {
  width: 100%;
  height: 430px;
  object-fit: cover;
  border-radius: 28px;
  border: 1px solid rgba(255,255,255,0.1);
  transition: 0.35s ease;
}

.gallery-grid img:hover {
  transform: scale(1.03);
  box-shadow: 0 25px 60px rgba(255,20,147,0.22);
}

.rsvp {
  background:
    radial-gradient(circle at top, rgba(255,20,147,0.25), transparent 38%),
    linear-gradient(135deg, #061421, #11051a);
  display: flex;
  justify-content: center;
}

.rsvp-card {
  max-width: 720px;
  width: 100%;
  padding: 58px;
  border-radius: 38px;
  background: rgba(255,255,255,0.09);
  border: 1px solid rgba(255,255,255,0.13);
  backdrop-filter: blur(18px);
  box-shadow: 0 35px 90px rgba(0,0,0,0.35);
}

.rsvp-card p {
  color: rgba(255,255,255,0.78);
  line-height: 1.7;
  margin-bottom: 35px;
}

.form-group {
  margin-bottom: 22px;
}

.form-group label {
  display: block;
  margin-bottom: 10px;
  font-weight: 700;
  color: #ffffff;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 17px 18px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.16);
  outline: none;
  background: rgba(255,255,255,0.1);
  color: #ffffff;
  font-size: 1rem;
}

.form-group input::placeholder {
  color: rgba(255,255,255,0.5);
}

.form-group select option {
  color: #111111;
}

.guest-fields {
  display: none;
}

.guest-fields.active {
  display: block;
}

.submit-btn {
  width: 100%;
  margin-top: 12px;
}

.form-message {
  margin-top: 22px;
  font-weight: 700;
  text-align: center;
  color: #ff8ccd;
}

.instagram-section {
  text-align: center;
  background:
    linear-gradient(rgba(5,11,20,0.9), rgba(5,11,20,0.95)),
    url('../images/natalie-ocean-party-experience.webp');
  background-size: cover;
  background-position: center;
}

.instagram-link {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 16px 26px;
  border-radius: 100px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.14);
  color: #ffffff;
  text-decoration: none;
  font-weight: 800;
  backdrop-filter: blur(14px);
}

.instagram-link img {
  width: 28px;
  height: 28px;
}

.footer {
  padding: 42px 8%;
  text-align: center;
  background: #03070d;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.footer p {
  margin-bottom: 8px;
  font-weight: 800;
}

.footer span {
  color: #ff5fbd;
  font-size: 0.9rem;
}

@media (max-width: 992px) {
  .intro {
    grid-template-columns: 1fr;
  }

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

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

  .intro-image img {
    min-height: 480px;
  }
}

@media (max-width: 768px) {
  section {
    padding: 85px 7%;
  }

  .navbar {
    padding: 18px 7%;
  }

  .navbar nav {
    display: none;
  }

  .hero {
    background-position: center top;
  }

  .hero p {
    font-size: 1rem;
  }

  .details-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid img {
    height: 460px;
  }

  .rsvp-card {
    padding: 38px 26px;
  }
}

@media (max-width: 480px) {
  .brand {
    font-size: 0.95rem;
  }

  .eyebrow {
    font-size: 0.68rem;
    letter-spacing: 2px;
  }

  .hero h2 {
    letter-spacing: 3px;
  }

  .intro-image img,
  .gallery-grid img {
    height: 400px;
    min-height: auto;
  }

  .detail-card {
    padding: 28px;
  }
}