:root {
  --ink: #0d1b2a;
  --sea: #1b4965;
  --mint: #60d394;
  --sun: #f4d35e;
  --cloud: #f7f9fb;
  --card: #ffffff;
  --shadow: 0 12px 30px rgba(13, 27, 42, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top, #e7f2ff, #ffffff 45%, #f4fff8 100%);
  line-height: 1.6;
}

header {
  padding: 32px 0 0;
}

main {
  padding: 24px 0 60px;
}

footer {
  padding: 24px 0;
  background: var(--ink);
  color: #ffffff;
  text-align: center;
}

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(13, 27, 42, 0.08);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.brand {
  font-weight: 700;
  font-size: 1.2rem;
  text-decoration: none;
  color: var(--ink);
}

.tagline {
  font-size: 0.95rem;
  color: var(--sea);
  margin-top: 8px;
}

.tagline::before {
  content: "• ";
}

nav ul {
  list-style: none;
  display: flex;
  gap: 16px;
  margin: 0;
  padding: 0;
}

nav a {
  text-decoration: none;
  color: var(--ink);
  font-weight: 500;
}

a:hover {
  color: var(--sea);
}

#hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  align-items: center;
  padding: 28px 0 8px;
}

.hero-card {
  background: linear-gradient(135deg, #ffffff, #e9f7ff);
  border-radius: 18px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 999px;
  background: var(--sea);
  color: #ffffff;
  text-decoration: none;
  border: none;
  cursor: pointer;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button:hover,
button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(27, 73, 101, 0.2);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(13, 27, 42, 0.06);
}

.card h3 {
  margin-top: 0;
}

.aside-tip {
  border-left: 4px solid var(--mint);
  background: #f2fff9;
  padding: 16px;
  border-radius: 12px;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  margin-bottom: 16px;
}

.section-title span {
  width: 36px;
  height: 3px;
  background: var(--sun);
  display: inline-block;
  border-radius: 999px;
}

form {
  display: grid;
  gap: 16px;
}

label {
  font-weight: 600;
  display: block;
  margin-bottom: 6px;
}

input,
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(13, 27, 42, 0.2);
  font-family: inherit;
}

input[type="time"] {
  background: #ffffff;
}

.form-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(96, 211, 148, 0.2);
  color: var(--sea);
  font-size: 0.85rem;
  font-weight: 600;
}

.media-frame {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
  background: #ffffff;
}

.checklist {
  list-style: none;
  padding: 0;
}

.checklist li {
  padding: 8px 0;
  border-bottom: 1px dashed rgba(13, 27, 42, 0.12);
}

.notice {
  margin-top: 12px;
  padding: 10px 14px;
  background: rgba(96, 211, 148, 0.2);
  border-radius: 10px;
  color: var(--sea);
  font-weight: 600;
}

@media (max-width: 720px) {
  nav ul {
    flex-wrap: wrap;
    gap: 10px;
  }

  .navbar .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}