/* ================= RESET ================= */
* {
  box-sizing: border-box;
}

body {
  background-color: #f1f1f1;
  font-family: Arial, sans-serif;
}

/* ================= MAIN ================= */
.main {
  max-width: 100%;
  margin: 56px 70px 24px 70px;
}

h2 {
  font-size: 36px;
  margin-bottom: 10px;
}

/* ================= FILTER BUTTONS ================= */
#myBtnContainer {
  margin-bottom: 20px;
}

.btn {
  border: none;
  outline: none;
  padding: 12px 18px;
  background-color: #fff;
  cursor: pointer;
  margin-right: 8px;
  font-size: 14px;
}

.btn:hover {
  background-color: #ddd;
}

.btn.active {
  background-color: #666;
  color: #fff;
}

/* ================= GRID ================= */
.row {
  margin: 0 -8px;
}

.row:after {
  content: "";
  display: table;
  clear: both;
}

/* COLUMN */
.column {
  float: left;
  width: 33.33%;       /* DESKTOP */
  padding: 8px;
  display: none;       /* hidden by default */
}

/* SHOW FILTERED ITEMS */
.show {
  display: block;
}

/* ================= CARD ================= */
.project-link {
  display: block;
  text-decoration: none;
  color: inherit;
  height: 100%;
}

.content {
  background-color: #fff;
  padding: 14px;
  min-height: 360px;          /* SAME HEIGHT */
  display: flex;
  flex-direction: column;
  transition: transform .3s ease, box-shadow .3s ease;
}

/* IMAGE */
.content img {
  width: 100%;
  height: 200px;              /* SAME IMAGE HEIGHT */
  object-fit: cover;
}

/* TITLE */
.content h4 {
  font-size: 18px;
  margin: 12px 0 6px;
}

/* DESCRIPTION (CLAMP TEXT) */
.content p {
  font-size: 14px;
  color: #666;
  line-height: 1.4;

  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 3;      /* MAX 3 LINES */
  -webkit-box-orient: vertical;
}

/* HOVER EFFECT */
.project-link:hover .content {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px rgba(0,0,0,0.15);
}

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

/* TABLET */
@media (max-width: 1024px) {
  .column {
    width: 50%;
  }

  .main {
    margin: 56px 30px 24px;
  }
}

/* MOBILE */
@media (max-width: 640px) {
  .column {
    width: 100%;
  }

  .main {
    margin: 56px 16px 24px;
  }

  .btn {
    margin-bottom: 8px;
  }
}