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

body {
  color: #111;
  background: #fff;
}

/* ================= NAVBAR ================= */
.navbar {
  position: sticky;
  top: 0;
  background: #000;
  z-index: 100;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 8%;
}

.logo {
  color: #fff;
  font-weight: 800;
  letter-spacing: 1px;
}

.nav-links a {
  color: #bbb;
  margin: 0 14px;
  text-decoration: none;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn-outline {
  background: transparent;
  border: 1px solid #fff;
  color: #fff;
  padding: 6px 14px;
  cursor: pointer;
}

/* ================= HERO ================= */
.hero {
  background: #000;
  color: #fff;
  padding: 100px 8%;
  position: relative;
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 60px;
}

.hero-text h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.2;
}

.hero-text p {
  margin: 20px 0;
  max-width: 520px;
  color: #ccc;
}

.email-form {
  display: flex;
  margin-top: 20px;
  max-width: 420px;
}

.email-form input {
  flex: 1;
  padding: 14px;
  border: none;
}

.email-form button {
  padding: 14px 22px;
  background: #0ea5e9;
  border: none;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

.hero-image {
  position: relative;
}

.hero-image img {
  width: 100%;
  max-height: 520px;
  object-fit: cover;
  filter: grayscale(100%) contrast(1.1);
  mask-image: linear-gradient(to left, black 70%, transparent 100%);
}

/* ================= TOPICS ================= */
.topics-section {
  padding: 90px 8%;
  text-align: center;
}

.search-box {
  margin: 20px auto;
  padding: 14px;
  width: 60%;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin: 40px 0;
}

.topic-tile {
  border: 1px solid #ddd;
  padding: 22px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.topic-tile:hover {
  background: #000;
  color: #fff;
}

.btn-primary {
  padding: 12px 26px;
  background: #000;
  color: #fff;
  border: none;
}

/* ================= BIG SEARCH ================= */
.big-search {
  padding: 90px 8%;
  background: #f7f7f7;
  text-align: center;
}

.big-search-box {
  display: flex;
  max-width: 620px;
  margin: 24px auto;
}

.big-search-box input {
  flex: 1;
  padding: 16px;
}

.big-search-box button {
  padding: 16px 22px;
}

.platforms {
  margin-top: 20px;
}

.platforms i {
  font-size: 22px;
  margin: 0 10px;
}

/* ================= TESTIMONIALS ================= */
.testimonials {
  padding: 90px 8%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.testimonial-card {
  border: 1px solid #eee;
  padding: 22px;
  margin-bottom: 20px;
}

/* ================= FOOTER ================= */
.footer {
  background: #f1f1f1;
  padding: 70px 8%;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.footer-grid a {
  display: block;
  color: #444;
  text-decoration: none;
  margin-top: 6px;
}

.footer-bottom {
  margin-top: 40px;
  text-align: center;
  font-size: 14px;
}

/* ================= RESPONSIVE ================= */
@media (max-width: 768px) {
  .hero-inner,
  .testimonials,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .search-box {
    width: 100%;
  }

  .topic-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-image img {
    mask-image: none;
  }
}