/* Modern Clean Color Palette */
:root {
    --primary-color: #008080; /* Teal */
    --secondary-color: #20B2AA; /* Light Sea Green */
    --accent-color: #FF7F50; /* Coral for Call to Actions */
    --text-dark: #333333;
    --text-light: #666666;
    --bg-light: #f4fcfc;
    --white: #ffffff;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
}

/* Navigation */
nav {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    margin-left: 2rem;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 128, 128, 0.9), rgba(0, 128, 128, 0.8)), url('https://unsplash.com');
    background-size: cover;
    background-position: center;
    color: var(--white);
    padding: 5rem 2rem;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 2rem;
}

.btn-main {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--white);
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    transition: transform 0.2s;
}

.btn-main:hover {
    transform: translateY(-3px);
}

/* Promotion / About Section */
.section {
    padding: 4rem 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.promotion-card {
    background: var(--white);
    border-left: 5px solid var(--primary-color);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    margin-bottom: 2rem;
}

.promotion-header {
    color: var(--primary-color);
    margin-top: 0;
}

.credentials-list {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 20px;
}

.credential-tag {
    background-color: #e0f2f1;
    color: #00695c;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.hospital-highlight {
    background-color: #fff3e0;
    color: #e65100;
    border: 1px solid #ffb74d;
}

/* Patient Logging Form */
.form-container {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    border-top: 5px solid var(--accent-color);
}

.form-title {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.form-subtitle {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-light);
    font-size: 1rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 2px solid #e1e1e1;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s;
    box-sizing: border-box;
}

.form-control:focus {
    border-color: var(--primary-color);
    outline: none;
}

.helper-text {
    font-size: 0.9rem;
    color: #d35400;
    font-weight: bold;
    margin-top: 8px;
    display: block;
    background: #fff3cd;
    padding: 10px;
    border-radius: 4px;
    border-left: 4px solid #ffc107;
}

.submit-btn {
    width: 100%;
    padding: 15px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 6px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s;
}

.submit-btn:hover {
    background-color: #006666;
}

/* Footer */
footer {
    background-color: var(--text-dark);
    color: var(--white);
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
}

/* Responsive Layout */
@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .form-container { padding: 1.5rem; }
}