:root {
  --navy-900: #0a1a3c;
  --navy-800: #0f2557;
  --navy-700: #16336e;
  --navy-600: #1e4494;
  --blue-accent: #3b82f6;
  --white: #ffffff;
  --off-white: #f5f7fb;
  --gray-600: #5b6478;
  --gray-300: #dde2ee;
  --shadow: 0 20px 40px rgba(10, 26, 60, 0.12);
  --radius: 14px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Poppins', sans-serif;
  color: var(--navy-900);
  background: var(--white);
  line-height: 1.6;
}

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.eyebrow--dark {
  color: var(--navy-700);
  background: rgba(30, 68, 148, 0.08);
  border: 1px solid rgba(30, 68, 148, 0.18);
}

/* Buttons */
.btn {
  display: inline-block;
  font-family: inherit;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border: none;
  border-radius: 10px;
  padding: 15px 32px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn--primary {
  background: var(--blue-accent);
  color: var(--white);
  box-shadow: 0 10px 24px rgba(59, 130, 246, 0.35);
}

.btn--primary:hover {
  background: #2563eb;
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(59, 130, 246, 0.45);
}

.btn--small {
  padding: 10px 22px;
  font-size: 0.9rem;
  background: var(--navy-900);
  color: var(--white);
}

.btn--small:hover {
  background: var(--navy-700);
}

.btn--full {
  width: 100%;
  text-align: center;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-300);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.navbar__logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--navy-900);
}

.navbar__logo span {
  color: var(--blue-accent);
}

.navbar__links {
  display: flex;
  gap: 32px;
}

.navbar__links a {
  color: var(--navy-800);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.navbar__links a:hover {
  color: var(--blue-accent);
}

/* Hero */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__image {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 26, 60, 0.35) 0%, rgba(10, 26, 60, 0.75) 100%);
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  color: var(--white);
  padding-top: 60px;
  padding-bottom: 60px;
}

.hero__content h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
}

.hero__content p {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 34px;
  max-width: 560px;
}

/* About */
.about {
  padding: 110px 0;
  background: var(--off-white);
}

.about__inner {
  max-width: 820px;
}

.about h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 24px;
}

.about p {
  color: var(--gray-600);
  font-size: 1.05rem;
  margin-bottom: 18px;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 50px;
}

.feature {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
}

.feature__icon {
  font-size: 1.8rem;
  margin-bottom: 14px;
}

.feature h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--navy-900);
}

.feature p {
  font-size: 0.92rem;
  margin-bottom: 0;
}

/* Registration */
.registration {
  padding: 110px 0;
  background: var(--navy-900);
  color: var(--white);
}

.registration__inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  align-items: start;
}

.registration__intro h2 {
  font-size: clamp(1.8rem, 3vw, 2.3rem);
  font-weight: 800;
  margin-bottom: 18px;
}

.registration__intro p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 1.02rem;
  max-width: 400px;
}

.seminar-info {
  margin-top: 32px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius);
  max-width: 420px;
}

.seminar-info__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
}

.seminar-info__meta {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.seminar-info__meta li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.95rem;
}

.seminar-info__icon {
  font-size: 1.1rem;
}

.form {
  background: var(--white);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow);
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form__group {
  margin-bottom: 18px;
}

.form__group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--navy-800);
  margin-bottom: 7px;
}

.form__group input,
.form__group textarea {
  width: 100%;
  font-family: inherit;
  font-size: 0.95rem;
  padding: 12px 14px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  color: var(--navy-900);
  background: var(--off-white);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form__group input:focus,
.form__group textarea:focus {
  outline: none;
  border-color: var(--blue-accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
  background: var(--white);
}

.form__group textarea {
  resize: vertical;
}

.form__status {
  margin-top: 14px;
  font-size: 0.9rem;
  font-weight: 600;
  min-height: 1.2em;
  color: #16a34a;
}

/* Footer */
.footer {
  background: var(--navy-900);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0;
}

.footer__inner p {
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.85rem;
  text-align: center;
}

/* Responsive */
@media (max-width: 860px) {
  .navbar__links {
    display: none;
  }

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

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

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