/* =============================
   RESET & GLOBAL BASE STYLES
============================= */

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

html {
  scroll-behavior: smooth;
}

body {
  line-height: 1.6;
  transition: background 0.3s, color 0.3s;
}

/* =============================
             NAVBAR
============================= */

.nav {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 15px 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  backdrop-filter: blur(10px);
  z-index: 1000;
}

.nav .logo {
  font-size: 1.6rem;
  font-weight: 600;
}

.nav a,
.contact-btn {
  margin-left: 20px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 500;
  border: none;
  background: none;
  text-decoration: none;
  transition: 0.3s;
}

/* =============================
               HERO
============================= */

.hero {
  width: 100%;
  height: 100vh;
  padding-top: 90px;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.hero-content .title {
  font-size: 3rem;
  font-weight: 700;
}

.hero-content .subtitle {
  font-size: 1.2rem;
  margin: 1rem 0 2rem;
}

.hero-btn {
  padding: 0.8rem 2rem;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-weight: 600;
  transition: 0.3s;
}

/* =============================
              SECTIONS
============================= */

section {
  padding: 110px 2rem;
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

section h2 {
  font-size: 2.2rem;
  margin-bottom: 1.5rem;
}

/* =============================
            GALLERY
============================= */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.2rem;
}

.gallery-grid img {
  width: 100%;
  border-radius: 12px;
  object-fit: cover;
  height: 200px;
}

/* =============================
         PORTFOLIO GRID
============================= */

.portfolio-filters {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.portfolio-filters button {
  padding: 0.5rem 1rem;
  cursor: pointer;
  border-radius: 8px;
  font-weight: 500;
  transition: 0.3s;
  border: none;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.portfolio-card {
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  transform: scale(0.95);
  opacity: 0;
  transition: 0.4s ease;
}

.portfolio-card.show {
  opacity: 1;
  transform: scale(1);
}

.portfolio-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: 0.3s;
  font-weight: 600;
}

.portfolio-card:hover .overlay {
  opacity: 1;
}

/* =============================
            BONUS: HEATMAP
============================= */

.heatmap {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.heatmap-item {
  padding: 1.2rem;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: 0.3s;
}

/* =============================
         RESPONSIVE
============================= */

@media (max-width: 768px) {
  .nav {
    flex-direction: column;
    text-align: center;
  }

  .nav a,
  .contact-btn {
    margin: 10px 0 0;
  }

  .hero .title {
    font-size: 2.4rem;
  }
}