/* ===== PAGE ===== */
.papers-page {
  margin-top: 40px;
  margin-bottom: 80px;
}

/* ===== SLIDER BOX ===== */
.paper-slider {
  margin-top: 30px;
}

/* ===== SLIDE CARD ===== */
.paper-card {
  display: flex;
  gap: 40px;
  height: 320px;              /* BOX CỐ ĐỊNH */
  padding: 30px;
  border: 1px solid #ddd;
  border-radius: 20px;
  background: #fff;
}

/* ===== LEFT IMAGE ===== */
.paper-left {
  flex: 0 0 50%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.paper-left img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;        /* ẢNH DÀI / RỘNG ĐỀU OK */
}

/* ===== RIGHT INFO ===== */
.paper-right {
  flex: 1;
}

.paper-title {
  font-size: 22px;
  font-weight: 600;
  color: #005cff;
  text-decoration: none;
}

.paper-title:hover {
  text-decoration: underline;
}

.paper-authors {
  margin-top: 12px;
  font-size: 15px;
}

.paper-pub {
  margin-top: 8px;
  font-size: 14px;
  color: #666;
  font-style: italic;
}

/* ===== CONTROLS ===== */
.paper-controls {
  margin-top: 25px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
}

/* Buttons */
.nav-btn {
  padding: 8px 18px;
  border-radius: 10px;
  border: 1px solid #ccc;
  background: #fff;
  cursor: pointer;
}

.nav-btn:hover {
  background: #f0f0f0;
}

/* ===== INDICATOR ===== */
.paper-indicator {
  display: flex;
  gap: 8px;
}

.paper-indicator span {
  width: 36px;
  height: 36px;
  line-height: 36px;
  text-align: center;
  border-radius: 8px;
  border: 1px solid #ccc;
  cursor: pointer;
}

.paper-indicator span.active {
  background: #333;
  color: #fff;
  border-color: #333;
}

.paper-controls button {
  padding: 8px 20px;
  border-radius: 12px;
  border: 1px solid #ccc;
  background: #fff;
}

.paper-slide-box {
  margin-top: 20px;
}

.paper-category-title {
  color: #C00000;
  font-weight: 700;
  margin-top: 40px;
  margin-bottom: 10px;
}

.paper-category-title i {
  margin-right: 8px;
}