/* Container & Typography */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: "Inter", sans-serif;
  background: #f4f6f9;
  display: flex;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem 0;
  transition: background 0.3s, color 0.3s;
}
.container {
  width: 95%;
  max-width: 1400px;
  text-align: center;
}

/* Headers */
h1 {
  color: #2c3e50;
  margin-bottom: 20px;
  font-size: 2.5rem;
  font-weight: 700;
  transition: color 0.3s;
}
.list h2 {
  color: #34495e;
  margin-bottom: 15px;
  font-size: 1.6rem;
  border-bottom: 2px solid #e1e4e8;
  padding-bottom: 5px;
  transition: color 0.3s;
}

/* Controls Layout */
.top-controls,
.filter-controls,
.bottom-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 15px;
}
.top-controls label {
  align-self: center;
  font-weight: 600;
  margin-left: 5px;
  margin-right: 2px;
}
.top-controls input,
.top-controls select,
.top-controls button,
.filter-controls select,
.bottom-controls button {
  padding: 0.7rem 1rem;
  border-radius: 6px;
  border: 1px solid #ccc;
  font-size: 1rem;
}

/* Buttons */
.top-controls button,
.bottom-controls button {
  background: #3498db;
  color: #fff;
  border: none;
  cursor: pointer;
  transition: 0.2s;
}
.top-controls button:hover,
.bottom-controls button:hover {
  background: #2980b9;
}

/* Board & List */
.board {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: space-between;
}
.list {
  background: #fff;
  padding: 1.5rem;
  border-radius: 12px;
  width: 30%;
  min-height: 450px;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s, background-color 0.3s;
}
.list:hover {
  transform: translateY(-5px);
}

/* Cards */
.card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  margin-bottom: 12px;
  border-radius: 10px;
  cursor: grab;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
  transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s;
}
.card:active {
  cursor: grabbing;
  transform: scale(1.05);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  background-color: #f0f3f7;
}
.card.low {
  border-left: 6px solid #2ecc71;
  background: linear-gradient(90deg, #dfffe0, #ffffff);
}
.card.medium {
  border-left: 6px solid #f1c40f;
  background: linear-gradient(90deg, #fff7d1, #ffffff);
}
.card.high {
  border-left: 6px solid #e74c3c;
  background: linear-gradient(90deg, #ffd7d7, #ffffff);
}
.card .actions {
  display: flex;
  gap: 5px;
}
.card button {
  border: none;
  border-radius: 4px;
  padding: 0.2rem 0.5rem;
  cursor: pointer;
  font-size: 0.8rem;
  color: #fff;
}
.card .editBtn {
  background: #f39c12;
}
.card .deleteBtn {
  background: #e74c3c;
}

/* Hover / Drag */
.list.over {
  background: #e3e6ea;
}

/* Dark Mode */
.dark-mode {
  background: #1e1e1e;
  color: #f5f5f5;
}
.dark-mode h1,
.dark-mode .list h2 {
  color: #f5f5f5;
}
.dark-mode .list {
  background: #2c2c2c;
  color: #f5f5f5;
}
.dark-mode .card.low {
  background: linear-gradient(90deg, #1e441e, #2c2c2c);
}
.dark-mode .card.medium {
  background: linear-gradient(90deg, #5a4a1e, #2c2c2c);
}
.dark-mode .card.high {
  background: linear-gradient(90deg, #5a1e1e, #2c2c2c);
}
/* Buttons in dark mode: orange */
.dark-mode .top-controls button,
.dark-mode .bottom-controls button {
  background: #f39c12;
}
.dark-mode .top-controls button:hover,
.dark-mode .bottom-controls button:hover {
  background: #e67e22;
}

/* Responsive */
@media (max-width: 1024px) {
  .list {
    width: 45%;
  }
}
@media (max-width: 768px) {
  .board {
    flex-direction: column;
    align-items: center;
  }
  .list {
    width: 90%;
    margin-bottom: 20px;
  }
}
.footer-credit {
  text-align: center;
  font-size: 0.9rem;
  color: #7f8c8d;
  margin-top: 30px;
  font-style: italic;
  transition: color 0.3s;
}
.footer-credit span {
  color: #e67e22; /* πορτοκαλί για έμφαση */
  font-weight: 600;
}
.dark-mode .footer-credit { color: #bdc3c7; }
.dark-mode .footer-credit span { color: #f39c12; }