:root {
    --primary-color: #2B88D8;
    --secondary-color: #FF6F00;
    --background-color: #f0f2f5;
    --surface-color: #ffffff;
    --text-color: #333;
    --success-color: #28a745;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
    box-shadow: var(--shadow);
}

header h1 {
    font-weight: 700;
}

footer {
    text-align: center;
    padding: 1rem 0;
    margin-top: 2rem;
    color: var(--secondary-color);
    font-size: 0.9em;
}

main {
    display: flex;
    gap: 30px;
    margin-top: 2rem;
}

#form-section {
    flex: 1;
    background: var(--surface-color);
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

#appointments-section {
    flex: 1;
}

h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: 'Poppins', sans-serif;
    font-size: 1em;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 8px rgba(43, 136, 216, 0.25);
}

.btn {
    display: block;
    width: 100%;
    padding: 14px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

#appointments-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.appointment-card {
    background-color: var(--surface-color);
    padding: 15px;
    border-left: 5px solid var(--success-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.appointment-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.12);
}

.appointment-card p {
    margin-bottom: 5px;
}

.appointment-card strong {
    color: var(--primary-color);
}

@media (max-width: 768px) {
    main {
        flex-direction: column;
        gap: 20px;
    }
    .container {
        padding: 15px;
    }
    header {
        padding: 1.5rem 0;
    }
    header h1 {
        font-size: 1.6em;
    }
    header p {
        font-size: 0.9em;
    }
    #form-section {
        padding: 20px;
    }
    h2 {
        font-size: 1.4em;
    }
    .btn {
        padding: 14px;
        font-size: 1em;
    }
}