.hero {
    background: linear-gradient(135deg, #0c0f33, #16204a);
    color: white;
    text-align: center;
    padding: 90px 20px;
}

.hero h1 {
    font-size: 42px;
    font-weight: 800;
}

.hero p {
    font-size: 18px;
    margin-top: 12px;
    opacity: .85;
}

.card-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    padding: 40px;
}

.protocol-card {
    background: #fff;
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
}

.card-header {
    background: linear-gradient(135deg, #0d1e50, #162c75);
    padding: 25px;
    border-radius: 16px;
    color: white;
    margin-bottom: 20px;
}

.card-header h2 {
    margin: 0;
    font-size: 22px;
    font-weight: 700;
    line-height: 1.3;
}

.card-header p {
    margin-top: 8px;
    font-size: 15px;
    opacity: 0.9;
}

.card-desc {
    color: #555;
    font-size: 15px;
    margin-bottom: 25px;
    line-height: 1.6;
}

.card-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #f4f6fa;
    padding: 12px 18px;
    border-radius: 12px;
    margin-bottom: 20px;
}

.duration i {
    margin-right: 6px;
    color: #555;
}

.level {
    padding: 6px 14px;
    border-radius: 12px;
    font-size: 13px;
    font-weight: 600;
}

.level.easy { background: #d8f8df; color: #0d8928; }
.level.moderate { background: #ffecc7; color: #a76b00; }
.level.advanced { background: #ffd4d8; color: #b11226; }

.price {
    font-size: 28px;
    font-weight: 700;
    color: #0d1e50;
    margin-bottom: 20px;
}

.card-actions {
    display: flex;
    justify-content: space-between;
    margin-top: auto;
}

.details-btn,
.add-btn {
    padding: 12px 20px;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 7px;
}

.details-btn {
    background: #f5f7fa;
    color: #0d1e50;
}

.add-btn {
    background: #0d1e50;
    color: white;
}

/* --- Modal Overlay --- */
#protocolModal {
    display: none; /* Hidden by default */
    position: fixed;
    inset: 0; /* top:0; right:0; bottom:0; left:0 */
    background: rgba(0, 0, 0, 0.7); /* Semi-transparent background */
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
    animation: fadeIn 0.3s ease;
}

/* --- Modal Content --- */
#protocolModal > div {
    background: #fff;
    border-radius: 12px;
    max-width: 500px;
    width: 100%;
    padding: 30px 25px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 15px;
    font-family: 'Arial', sans-serif;
    animation: slideIn 0.3s ease;
}

/* --- Close Button --- */
#protocolModal #closeModal {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 24px;
    font-weight: bold;
    color: #333;
    cursor: pointer;
    transition: color 0.2s ease;
}

#protocolModal #closeModal:hover {
    color: #001b4e;
}

/* --- Modal Title --- */
#protocolModal #modalTitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: #001b4e;
    margin-bottom: 10px;
}

/* --- Modal Description --- */
#protocolModal #modalDescription {
    font-size: 1rem;
    line-height: 1.5;
    color: #444;
}

/* --- Modal Price --- */
#protocolModal #modalPrice {
    font-size: 1.25rem;
    font-weight: bold;
    color: #001b4e;
    margin-top: 10px;
}

/* --- Add to Cart Button --- */
#protocolModal #addModalBtn {
    background-color: #001b4e;
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 12px 20px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
    margin-top: 15px;
}

#protocolModal #addModalBtn:hover {
    background-color: #003080;
    transform: translateY(-2px);
}

/* --- Animations --- */
@keyframes fadeIn {
    from {opacity: 0;}
    to {opacity: 1;}
}

@keyframes slideIn {
    from {transform: translateY(-20px); opacity:0;}
    to {transform: translateY(0); opacity:1;}
}

body {
  padding-top: 90px; /* desktop navbar height */
}

@media (max-width: 768px) {
  body {
    padding-top: 110px; /* mobile navbar height */
  }
}

@media (max-width: 768px) {
  .hero {
    padding: 70px 16px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero p {
    font-size: 15px;
  }
}

@media (max-width: 1024px) {
  .card-container {
    grid-template-columns: repeat(2, 1fr);
    padding: 30px;
  }
}

@media (max-width: 768px) {
  .card-container {
    grid-template-columns: 1fr;
    padding: 20px;
    gap: 20px;
  }
}