* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', sans-serif;
}

body {
  background: #020202;
  color: #eaeaf0;
  min-height: 100vh;
}

/* layout */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
}

/* header */
.header {
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-weight: 600;
  font-size: 1.1rem;
}

.nav a {
  color: #eaeaf0;
  text-decoration: none;
  margin-left: 20px;
  opacity: 0.8;
  transition: 0.2s;
}

.nav a:hover {
  opacity: 1;
}

/* card */
.card {
  margin-top: 60px;
  background: rgba(255,255,255,0.05);
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.contact-card {
  margin-top: 40px;
}

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

label {
  display: grid;
  gap: 8px;
  font-size: 0.95rem;
  color: #d8d8e7;
}

input,
textarea {
  width: 100%;
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(255,255,255,0.05);
  color: #f3f3ff;
  border-radius: 14px;
  padding: 14px 16px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus,
textarea:focus {
  border-color: rgba(255,255,255,0.4);
  box-shadow: 0 0 0 3px rgba(255,255,255,0.06);
}

textarea {
  resize: vertical;
}

h2 {
  font-weight: 400;
  opacity: 0.7;
  margin-bottom: 30px;
}

p {
  line-height: 1.6;
  margin-bottom: 20px;
}

/* links */
.links {
  margin-top: 40px;
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.links a {
  text-decoration: none;
  color: #fff;
  padding: 10px 18px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  transition: 0.25s ease;
}

.links a:hover {
  background: rgba(255,255,255,0.18);
}

/* footer */
.footer {
  text-align: center;
  margin-top: 60px;
  padding: 30px;
  font-size: 0.85rem;
  opacity: 0.6;
}

/* Люблю button */
.love-btn {
  background: linear-gradient(90deg,#ff5a79,#ff9a9e);
  color: #111;
  border: none;
  padding: 12px 20px;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(255,90,121,0.18);
  transition: transform .12s ease, opacity .12s ease;
}
.love-btn:active { transform: translateY(1px) scale(.997); }
.love-btn:disabled { opacity: .6; cursor: not-allowed; }

@media (max-width: 768px) {
  .container {
    padding: 18px;
  }

  .header .container {
    flex-wrap: wrap;
    gap: 16px;
  }

  .nav {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }

  .nav a {
    margin-left: 0;
    padding: 10px 14px;
    background: rgba(255,255,255,0.05);
    border-radius: 999px;
  }

  .card {
    padding: 28px;
  }

  .links {
    justify-content: center;
  }

  .footer {
    margin-top: 40px;
    padding: 24px 8px;
  }
}

@media (max-width: 520px) {
  h1 {
    font-size: 2rem;
  }

  .card {
    margin-top: 40px;
    padding: 24px;
  }

  .nav {
    justify-content: center;
  }

  .love-btn {
    width: 100%;
    padding: 14px 18px;
  }
}