:root {
  --color-bg: #f5f7fb;
  --color-surface: #ffffff;
  --color-primary: #e60012;
  --color-primary-dark: #b5000e;
  --color-nav: #1b1e26;
  --color-text: #1f2937;
  --color-muted: #6b7280;
  --shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
}

header {
  background: var(--color-primary);
  color: #fff;
  padding: 12px 20px;
  box-shadow: var(--shadow);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo img {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.logo h1 {
  font-size: 1.25rem;
  margin: 0;
}

.container {
  display: flex;
  min-height: calc(100vh - 68px);
}

nav {
  background: var(--color-nav);
  width: 220px;
  padding: 20px 0;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

nav a {
  color: #fff;
  text-decoration: none;
  padding: 12px 18px;
  display: block;
  transition: background 0.2s ease;
}

nav a:hover,
nav a.active {
  background: #2d3342;
  border-left: 4px solid var(--color-primary);
  padding-left: 14px;
}

main {
  flex: 1;
  padding: 24px;
}

.hero {
  background: var(--color-surface);
  border-radius: 14px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.hero h2 {
  margin-top: 0;
}

.section-title {
  margin: 28px 0 12px;
}

.card-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.card {
  background: var(--color-surface);
  border-radius: 12px;
  padding: 16px;
  box-shadow: var(--shadow);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.card p {
  margin: 0;
}

.card .meta {
  margin-top: 10px;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.contact-card {
  background: var(--color-surface);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 24px;
  max-width: 640px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}

label {
  font-weight: 600;
}

input,
textarea {
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font: inherit;
  padding: 10px 12px;
}

button {
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  font: inherit;
  cursor: pointer;
}

button:hover {
  background: var(--color-primary-dark);
}

.feedback {
  margin-top: 12px;
  font-weight: 600;
}

.feedback.success {
  color: #047857;
}

.feedback.error {
  color: #b91c1c;
}

@media (max-width: 800px) {
  .container {
    flex-direction: column;
  }

  nav {
    width: 100%;
  }

  main {
    padding: 16px;
  }
}