:root {
    --primary-color: #4a6fa5;
    --secondary-color: #6c96c5;
    --light-color: #e8f0f9;
    --dark-color: #2c3e50;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f7fa;
    color: var(--dark-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem;
    text-align: center;
    margin-bottom: 2rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

h1 {
    font-size: 2rem;
}

.family-tree-container {
    display: flex;
    justify-content: center;
    overflow-x: auto;
    min-height: 500px;
    margin-bottom: 2rem;
    padding: 20px;
    outline: none; /* Remove outline when focused for keyboard navigation */
}

.family-tree {
    position: relative;
    transition: transform 0.3s ease;
}

.member {
    position: absolute;
    width: 200px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    padding: 15px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 1;
}

.member:hover {
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    transform: translateY(-5px);
}

.member.selected {
    box-shadow: 0 0 0 3px var(--secondary-color);
}

.member-img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 10px;
    background-color: var(--light-color);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.member-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.member-name {
    font-weight: bold;
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.member-info {
    font-size: 0.9rem;
    color: #666;
}

.relationship-line {
    position: absolute;
    background-color: var(--secondary-color);
    z-index: 0;
}

.control-panel {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    padding: 20px;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
}

input, select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: var(--secondary-color);
}

.buttons-row {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.secondary-btn {
    background-color: var(--secondary-color);
}

.warning-btn {
    background-color: var(--warning-color);
    color: var(--dark-color);
}

.danger-btn {
    background-color: var(--danger-color);
}

.hidden {
    display: none;
}

.zoom-controls {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
}

.zoom-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    border-radius: 50%;
}

.instructions {
    margin-bottom: 20px;
    padding: 15px;
    background-color: var(--light-color);
    border-radius: 5px;
    border-left: 5px solid var(--primary-color);
}

.keyboard-controls {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid #ddd;
}

@media (max-width: 768px) {
    .member {
        width: 180px;
    }
}