/* ── Reset & Base ── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --red: #d92b2b;
  --red-dark: #b81e1e;
  --red-light: #fdf2f2;
  --white: #ffffff;
  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #e5e5e5;
  --gray-400: #a3a3a3;
  --gray-600: #525252;
  --gray-800: #262626;
  --gray-900: #171717;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.07), 0 4px 10px rgba(0, 0, 0, 0.04);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Nav ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--gray-900);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
}

.nav-links a {
  text-decoration: none;
  color: var(--gray-600);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--red);
}

/* ── Hero ── */
.hero {
  padding: 160px 0 120px;
  text-align: center;
  background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--gray-900);
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--gray-600);
  max-width: 520px;
  margin: 0 auto 40px;
}

/* ── Button ── */
.btn {
  display: inline-block;
  background: var(--red);
  color: var(--white);
  padding: 12px 28px;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, transform 0.15s;
}

.btn:hover {
  background: var(--red-dark);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

/* ── Sections ── */
.products,
.contact {
  padding: 100px 0;
}

.products {
  background: var(--white);
}

.contact {
  background: var(--gray-50);
}

h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-900);
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: 8px;
}

.section-sub {
  text-align: center;
  color: var(--gray-600);
  margin-bottom: 48px;
}

/* ── Product Grid ── */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.product-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 32px;
  text-align: left;
  transition: box-shadow 0.2s, transform 0.2s;
}

.product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.product-icon {
  margin-bottom: 16px;
  color: var(--red);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--red-light);
  border-radius: var(--radius);
}

.product-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 4px;
}

.product-tagline {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--red);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.product-card p {
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 1.55;
}

.product-highlights {
  list-style: none;
  margin-top: 16px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.product-highlights li {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--gray-600);
  background: var(--gray-100);
  padding: 4px 10px;
  border-radius: 100px;
}

/* ── Contact Form ── */
.contact-form {
  max-width: 520px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--gray-800);
  background: var(--white);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(217, 43, 43, 0.1);
}

.contact-form .btn {
  width: 100%;
}

/* ── Footer ── */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--gray-200);
  background: var(--white);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer p {
  font-size: 0.85rem;
  color: var(--gray-400);
}

.footer-domain {
  font-weight: 500;
  color: var(--gray-600);
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .hero {
    padding: 130px 0 80px;
  }

  .products,
  .contact {
    padding: 72px 0;
  }

  .nav-links {
    gap: 20px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 4px;
    text-align: center;
  }
}