* {
  box-sizing: border-box;
}

:root {
  --ink: #101a35;
  --text: #4f5c5a;
  --teal: #62bfa6;
  --blue: #23599f;
  --border: #d8e0df;
  --light: #f5f8f8;
  --white: #ffffff;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 40px;
  border-bottom: 1px solid var(--border);
  background-color: var(--white);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: bold;
  text-decoration: none;
}

.logo-image {
  display: block;
  width: 190px;
  height: auto;
}

nav {
  display: flex;
  gap: 25px;
}

nav a,
footer a {
  color: var(--text);
  text-decoration: none;
}

nav a:hover,
footer a:hover {
  color: var(--blue);
  text-decoration: underline;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
}

.hero-section,
.content-section,
.signup-section {
  padding: 90px 40px;
}

.hero-section {
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero-content,
.two-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

h1 {
  margin: 0;
  font-size: 72px;
  line-height: 1.05;
}

h2 {
  margin: 0 0 20px;
  font-size: 42px;
  line-height: 1.15;
}

h3 {
  margin-bottom: 8px;
}

p {
  color: var(--text);
}

.tagline {
  color: var(--ink);
  font-size: 28px;
}

.section-title {
  margin-bottom: 10px;
  color: var(--blue);
  font-size: 14px;
  font-weight: bold;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero-buttons {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 30px;
}

.main-button,
.secondary-button {
  display: inline-block;
  border: 1px solid var(--blue);
  border-radius: 8px;
  background-color: var(--blue);
  color: var(--white);
  cursor: pointer;
  font: inherit;
  font-weight: bold;
  padding: 13px 20px;
  text-decoration: none;
  white-space: nowrap;
}

.secondary-button {
  margin-top: 15px;
  background-color: var(--white);
  color: var(--blue);
}

.main-button:hover,
.secondary-button:hover {
  background-color: var(--ink);
  color: var(--white);
}

.main-button:disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.small-text {
  font-size: 15px;
}

.brand-visual,
.logo-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed var(--border);
  border-radius: 8px;
  background-color: var(--light);
  color: var(--text);
}

.brand-visual {
  min-height: 420px;
  padding: 35px;
}

.brand-visual img {
  display: block;
  width: 100%;
  height: auto;
}

.logo-placeholder {
  min-height: 120px;
  margin-bottom: 20px;
  padding: 20px;
  text-align: center;
  font-weight: bold;
}

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

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 35px;
}

.partner-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 35px;
}

.info-card,
.partner-card,
.event-box,
.signup-form {
  border: 1px solid var(--border);
  border-radius: 8px;
  background-color: var(--white);
  padding: 25px;
}

.icon-box {
  display: flex;
  width: 55px;
  height: 55px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: #e8f4f2;
  color: var(--blue);
  font-size: 24px;
  font-weight: bold;
}

.audience-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
  padding: 0;
  list-style: none;
}

.audience-list li {
  border-left: 4px solid var(--teal);
  background-color: var(--light);
  padding: 18px;
}

.event-list {
  margin: 20px 0 5px;
  padding-left: 20px;
  color: var(--text);
}

.event-list li {
  margin-bottom: 8px;
}

.partner-card a {
  color: var(--blue);
  font-weight: bold;
}

.signup-section {
  background-color: var(--ink);
}

.signup-section h2,
.signup-section .section-title {
  color: var(--white);
}

.signup-section p {
  color: #e1eeee;
}

.signup-form label {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
  font-weight: bold;
}

.signup-form input,
.signup-form select {
  width: 100%;
  margin-bottom: 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
  padding: 12px;
}

#form-message {
  min-height: 24px;
  margin-bottom: 0;
}

.success-message {
  color: #17643d;
}

.error-message {
  color: #9f2424;
}

footer {
  padding: 25px 40px;
  border-top: 1px solid var(--border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

footer a {
  margin-left: 20px;
}

@media (max-width: 800px) {
  header {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
    padding: 18px 20px;
  }

  nav {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
  }

  .hero-section,
  .content-section,
  .signup-section {
    padding: 60px 20px;
  }

  .hero-content,
  .two-columns,
    .card-grid,
    .partner-grid,
    .audience-list {
      grid-template-columns: 1fr;
    }

  h1 {
    font-size: 42px;
  }

  h2 {
    font-size: 32px;
  }

  .tagline {
    font-size: 22px;
  }

  .hero-buttons,
  .footer-content {
    align-items: flex-start;
    flex-direction: column;
  }

  .main-button,
  .secondary-button {
    width: 100%;
    text-align: center;
  }

  footer a {
    display: block;
    margin: 8px 0 0;
  }
}