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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #0f172a;
    color: #f1f5f9;
    overflow: hidden;
    height: 100vh;
}

.container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
}

header {
    padding: 20px;
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #475569;
}

h1 {
    text-align: center;
    margin-bottom: 15px;
    font-size: 2em;
    text-shadow: 0 0 20px rgba(59, 130, 246, 0.5);
    background: linear-gradient(90deg, #f1f5f9, #3b82f6, #f1f5f9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.controls label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9em;
}

.controls input[type="range"] {
    width: 150px;
    cursor: pointer;
}

.controls input[type="checkbox"] {
    cursor: pointer;
}

.controls select {
    padding: 5px 10px;
    background: #1e293b;
    border: 1px solid #475569;
    color: #f1f5f9;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9em;
}

.controls button {
    padding: 8px 20px;
    background: #3b82f6;
    border: 1px solid #3b82f6;
    color: #ffffff;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9em;
    transition: all 0.3s ease;
}

.controls button:hover {
    background: #2563eb;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.controls button:active {
    transform: translateY(0);
}

#solarSystemCanvas {
    flex: 1;
    display: block;
    cursor: grab;
    background: radial-gradient(circle at center, #1e293b 0%, #0f172a 100%);
}

#solarSystemCanvas:active {
    cursor: grabbing;
}

.info {
    padding: 10px;
    text-align: center;
    font-size: 0.85em;
    color: #cbd5e1;
    background: rgba(30, 41, 59, 0.5);
}

/* Property Editor Panel */
.property-editor {
    position: fixed;
    width: 300px;
    background: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid #475569;
    border-radius: 10px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    z-index: 1000;
    padding: 0;
    overflow: hidden;
}

.editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: rgba(59, 130, 246, 0.1);
    border-bottom: 1px solid #475569;
}

.editor-header h3 {
    margin: 0;
    font-size: 1.2em;
    color: #3b82f6;
}

.close-btn {
    background: transparent;
    border: none;
    color: #f1f5f9;
    font-size: 24px;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.close-btn:hover {
    background: rgba(71, 85, 105, 0.3);
    transform: scale(1.1);
}

.editor-form {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.form-group label {
    font-size: 0.9em;
    color: #cbd5e1;
    font-weight: 500;
}

.form-group input[type="number"],
.form-group input[type="color"] {
    padding: 8px 12px;
    background: #1e293b;
    border: 1px solid #475569;
    border-radius: 5px;
    color: #f1f5f9;
    font-size: 0.9em;
    transition: all 0.2s ease;
}

.form-group input[type="number"]:focus,
.form-group input[type="color"]:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 8px rgba(59, 130, 246, 0.3);
}

.form-group input[type="color"] {
    height: 40px;
    cursor: pointer;
    padding: 2px;
}

.apply-btn {
    padding: 10px 20px;
    background: #3b82f6;
    border: 1px solid #3b82f6;
    color: #ffffff;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.95em;
    font-weight: 500;
    margin-top: 5px;
    transition: all 0.3s ease;
}

.apply-btn:hover {
    background: #2563eb;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.apply-btn:active {
    transform: translateY(0);
}

.create-moon-btn {
    padding: 10px 20px;
    background: #3b82f6;
    border: 1px solid #3b82f6;
    color: #ffffff;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9em;
    width: 100%;
    margin-top: 10px;
    transition: all 0.3s ease;
}

.create-moon-btn:hover {
    background: #2563eb;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.delete-body-btn {
    padding: 10px 20px;
    background: rgba(244, 67, 54, 0.3);
    border: 1px solid rgba(244, 67, 54, 0.5);
    color: #ffffff;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9em;
    width: 100%;
    margin-top: 10px;
    transition: all 0.3s ease;
}

.delete-body-btn:hover {
    background: rgba(244, 67, 54, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(244, 67, 54, 0.3);
}