:root {
  --bg: #f5f4ef;
  --fg: #101316;
  --muted: #5e646b;
  --line: #ded9cf;
  --panel: rgba(255, 255, 255, 0.82);
  --blue: #2f7ddd;
  --blue-dark: #245ca7;
  --shadow: 0 20px 60px rgba(16, 19, 22, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--fg);
  font-family: Roboto, Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  background:
    radial-gradient(circle at top left, rgba(47, 125, 221, 0.08), transparent 28%),
    radial-gradient(circle at top right, rgba(16, 28, 45, 0.06), transparent 26%),
    var(--bg);
}

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
p {
  margin-top: 0;
}

h1,
h2,
.brand,
.nav,
.button {
  font-family: "Roboto Condensed", Roboto, Arial, Helvetica, sans-serif;
}

.shell {
  margin: 16px auto;
  max-width: 1120px;
  padding: 0 16px 24px;
}

.header,
.hero,
.card,
.footer {
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.header {
  align-items: center;
  background: rgba(255, 255, 255, 0.84);
  display: flex;
  justify-content: space-between;
  margin-bottom: 16px;
  padding: 20px 24px;
  backdrop-filter: blur(10px);
}

.brand {
  align-items: center;
  display: inline-flex;
  gap: 12px;
  font-size: 1.45rem;
  font-weight: 900;
}

.brand img {
  height: 42px;
  width: 42px;
}

.nav {
  display: flex;
  gap: 22px;
  font-size: 1.04rem;
  font-weight: 800;
}

.nav a {
  color: var(--muted);
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--blue);
}

.hero {
  background:
    linear-gradient(
      90deg,
      rgba(245, 244, 239, 0.98) 0%,
      rgba(245, 244, 239, 0.96) 30%,
      rgba(245, 244, 239, 0.9) 45%,
      rgba(245, 244, 239, 0.68) 62%,
      rgba(245, 244, 239, 0.28) 82%,
      rgba(245, 244, 239, 0) 100%
    ),
    url("./source/smart-energy-home.png");
  background-position: center right;
  background-repeat: no-repeat;
  background-size: cover;
  margin-bottom: 16px;
  overflow: hidden;
  padding: 40px;
}

.hero-copy {
  background: rgba(255, 255, 255, 0.46);
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 20px;
  backdrop-filter: blur(8px);
  max-width: 680px;
  padding: 22px 24px;
}

.eyebrow {
  color: var(--blue-dark);
  font-size: 0.95rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  margin-bottom: 18px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4.4rem);
  font-weight: 900;
  line-height: 1.02;
  margin-bottom: 18px;
}

.hero p {
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.55;
  max-width: 58ch;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}

.button {
  align-items: center;
  border-radius: 12px;
  display: inline-flex;
  font-size: 1.04rem;
  font-weight: 900;
  justify-content: center;
  min-height: 54px;
  padding: 0 22px;
}

.primary {
  background: var(--blue);
  color: #fff;
}

.primary:hover,
.primary:focus-visible {
  background: var(--blue-dark);
}

.secondary {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--fg);
}

.secondary:hover,
.secondary:focus-visible {
  border-color: var(--blue);
  color: var(--blue);
}

.card {
  background: var(--panel);
  margin-bottom: 16px;
  padding: 34px 36px;
}

.card h2 {
  font-size: clamp(1.9rem, 3vw, 2.7rem);
  font-weight: 900;
  margin-bottom: 18px;
}

.list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding-left: 20px;
}

.list li {
  color: var(--muted);
  font-size: 1.05rem;
}

.contact {
  display: grid;
  gap: 36px;
  grid-template-columns: minmax(0, 0.88fr) minmax(320px, 1fr);
}

.contact p {
  color: var(--muted);
  font-size: 1.05rem;
}

.form {
  display: grid;
  gap: 18px;
}

.form label {
  display: grid;
  gap: 8px;
  font-size: 0.98rem;
  font-weight: 800;
}

.form input,
.form select,
.form textarea {
  background: #fff;
  border: 1px solid #d6d0c5;
  border-radius: 10px;
  color: var(--fg);
  font: inherit;
  min-height: 52px;
  padding: 14px 16px;
  width: 100%;
}

.form textarea {
  min-height: 128px;
  resize: vertical;
}

.form input:focus,
.form select:focus,
.form textarea:focus {
  border-color: var(--blue);
  outline: 3px solid rgba(47, 125, 221, 0.2);
}

.form .button {
  width: 100%;
}

.hint {
  color: var(--muted);
  font-size: 0.9rem;
  margin: -4px 0 0;
}

.message {
  border-radius: 10px;
  font-weight: 700;
  margin: 0;
  padding: 12px 14px;
}

.message.success {
  background: rgba(47, 125, 101, 0.16);
  color: #215a49;
}

.message.error {
  background: rgba(232, 93, 63, 0.14);
  color: #913220;
}

.footer {
  align-items: center;
  background: rgba(255, 255, 255, 0.72);
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  margin-top: 16px;
  padding: 20px 24px;
}

.footer p {
  font-weight: 800;
  margin: 0;
}

.footer nav {
  display: flex;
  gap: 10px;
  font-weight: 700;
}

@media (max-width: 900px) {
  .header,
  .contact,
  .footer {
    display: grid;
    gap: 18px;
  }

  .nav {
    justify-content: flex-start;
  }

  .hero {
    padding: 28px;
  }
}

@media (max-width: 640px) {
  .shell {
    margin: 0 auto;
    padding: 0;
  }

  .header,
  .hero,
  .card,
  .footer {
    border-radius: 0;
  }

  .actions,
  .button {
    width: 100%;
  }

  .nav,
  .footer {
    flex-direction: column;
    align-items: flex-start;
  }
}