@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@600;700;800&display=swap');

:root {
  --sky-100: #edf7ff;
  --sky-200: #dfeeff;
  --sea-600: #1d5b8a;
  --sea-700: #153d5b;
  --sun-400: #f4b35f;
  --sun-300: #ffe9b5;
  --mint-500: #3ba77a;
  --slate-100: #f3f6f8;
  --slate-200: #dfe7ee;
  --text: #1e2f3d;
  --muted: #5c6f82;
  --white: #ffffff;
  --shadow: 0 12px 30px rgba(17, 52, 78, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', Arial, sans-serif;
  background: linear-gradient(180deg, #edf8ff 0%, #f5f9fc 100%);
  color: var(--text);
  line-height: 1.6;
}

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

a {
  color: var(--sea-600);
  text-decoration: none;
}

a:hover,
 a:focus {
  text-decoration: underline;
}

header {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas: "hero" "navigation";
  background: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid var(--slate-200);
  box-shadow: 0 8px 18px rgba(21, 61, 91, 0.04);
}

header::before {
  content: "";
  grid-area: hero;
  z-index: 1;
  background: rgba(18, 38, 36, 0.24);
  pointer-events: none;
}

header h1 {
  grid-area: hero;
  z-index: 2;
  place-self: center;
  margin: 0;
  padding: 1rem;
  color: var(--white);
  font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
  font-size: clamp(2rem, 3vw, 3rem);
  font-weight: 800;
  text-align: center;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

header img {
  grid-area: hero;
  width: 100%;
  height: clamp(220px, 28vw, 340px);
  margin: 0;
  object-fit: cover;
}

nav {
  grid-area: navigation;
  padding: 0 1.5rem 1.25rem;
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

nav li {
  margin: 0;
}

nav a {
  display: inline-block;
  padding: 0.7rem 1.1rem;
  border: 1px solid var(--slate-200);
  border-radius: 999px;
  background: linear-gradient(135deg, var(--sea-600), var(--sun-400));
  color: var(--white);
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

nav a:hover,
nav a:focus {
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 10px 18px rgba(29, 91, 138, 0.12);
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

main h2 {
  margin-top: 0;
  margin-bottom: 0.8rem;
  color: var(--sea-700);
  font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
  font-size: clamp(1.7rem, 2vw, 2.3rem);
}

main p,
main li,
main label,
main td,
main th {
  color: var(--text);
}

section {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  overflow: hidden;
}

section h2 {
  font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
  font-size: clamp(1.3rem, 1.5vw, 1.8rem);
  margin-top: 0;
  margin-bottom: 1rem;
}

form {
  display: grid;
  gap: 0.8rem;
  max-width: 520px;
}

label {
  font-weight: 700;
}

input {
  width: 100%;
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--slate-200);
  border-radius: 12px;
  font: inherit;
  background: #fff;
}

input:focus {
  outline: none;
  border-color: var(--sea-600);
  box-shadow: 0 0 0 4px rgba(29, 91, 138, 0.1);
}

button {
  width: fit-content;
  min-width: 140px;
  border: none;
  border-radius: 12px;
  padding: 0.8rem 1.15rem;
  background: linear-gradient(135deg, var(--sea-600), var(--sun-400));
  color: var(--white);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: filter 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
}

button:hover,
button:focus {
  filter: brightness(1.12);
  transform: translateY(-1px);
  opacity: 1;
}

ul {
  padding-left: 1.2rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

th,
td {
  padding: 0.8rem 0.9rem;
  border-bottom: 1px solid var(--slate-200);
  text-align: left;
}

th {
  background: #f8fbff;
  color: var(--sea-700);
}

code {
  background: var(--slate-100);
  border: 1px solid var(--slate-200);
  border-radius: 8px;
  padding: 0.1rem 0.35rem;
  font-family: Consolas, monospace;
}

footer {
  background: linear-gradient(135deg, #172a30, #293d45);
  color: #f5f9fc;
  text-align: center;
  padding: 1.5rem 1rem;
}

footer a {
  color: #fff0b0;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

footer p {
  margin: 0.25rem 0;
}

@media (max-width: 700px) {
  nav ul {
    flex-direction: column;
  }

  nav a {
    width: 100%;
    text-align: center;
  }

  main {
    padding-left: 0.9rem;
    padding-right: 0.9rem;
  }

  section {
    padding: 1rem;
  }
}