:root {
  --bg-white: #FFFFFF;
  --bg-dark: #2E3036;
  --text-dark: #1C1C1E;
  --text-muted: #6B6E76;
  --btn-dark: #1C1C1E;
  --btn-hover: #111111;
}

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

body {
  background: var(--bg-white);
  color: var(--text-dark);
  text-align: center;
  overflow-x: hidden;
}

/* ================= NAV ================= */
nav {
  padding: 28px 8%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #E3E3E3;
}

nav h1 {
  letter-spacing: 3px;
  font-weight: 600;
}

nav a {
  text-decoration: none;
  color: var(--text-muted);
  margin-left: 25px;
  transition: 0.2s ease;
}

nav a:hover {
  color: var(--text-dark);
}

/* ================= HERO ================= */
.hero {
  padding: 160px 8%;
}

.hero h2 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 35px;
}

/* ================= BUTTON ================= */
.btn {
  padding: 14px 36px;
  background: var(--btn-dark);
  color: var(--bg-white);
  border: none;
  font-weight: 600;
  cursor: pointer;
  border-radius: 6px;

  position: relative;
  overflow: hidden;

  display: inline-block;
  transition: all 0.25s ease;
  box-shadow: 0 4px 6px rgba(0,0,0,0.15);
}

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  transform: translateY(100%);
  transition: 0.3s ease;
}

.btn:hover::after {
  transform: translateY(0);
}

.btn:hover {
  background: var(--btn-hover);
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 6px 14px rgba(0,0,0,0.25);
}

/* ================= COLLECTION GRID ================= */
.collection {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 280px));
  justify-content: center;
  gap: 40px;
  padding: 80px 8%;
}

/* ================= FOOTER ================= */
footer {
  padding: 80px 20%;
  color: var(--text-muted);
  font-size: 0.9rem;
  border-top: 1px solid #E3E3E3;
  margin-top: 50px;
}

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

/* Tablet */
@media (max-width: 900px) {
  .collection {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
  }
}

/* Phone */
@media (max-width: 768px) {
  .hero {
    padding: 100px 6%;
  }

  .hero h2 {
    font-size: 2.4rem;
  }

  .hero p {
    font-size: 1rem;
  }

  nav {
    flex-direction: column;
    gap: 12px;
  }

  .btn {
    width: 100%;
  }
}

/* Small phone */
@media (max-width: 500px) {
  .collection {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 60px 6%;
  }
}