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

body {
    background-color: #0f0e17;
    color: #fffffe;
    overflow: hidden;
    height: 100vh;
    transition: background 0.5s ease;
}

body.light-mode {
    background-color: #f8f8f8;
    color: #232323;
}

.universe {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    transform-origin: center;
    transition: transform 0.3s ease;
}

.sun {
    position: absolute;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle at 30% 30%, #ffd700, #ff8c00);
    border-radius: 50%;
    box-shadow: 0 0 60px #ff8c00, 0 0 120px #ff8c00aa;
    z-index: 1;
    transition: all 0.5s ease;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    cursor: pointer;
    padding: 20px;
}

.sun-title {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 5px;
    text-shadow: 0 0 5px rgba(0,0,0,0.5);
}

.sun-description {
    font-size: 0.8rem;
    opacity: 0.9;
    margin-bottom: 10px;
}

.sun-stats {
    font-size: 0.7rem;
    opacity: 0.8;
}

.light-mode .sun {
    background: radial-gradient(circle at 30% 30%, #ffd700, #ff4500);
    box-shadow: 0 0 60px #ff4500, 0 0 120px #ff4500aa;
    color: #333;
}

.sun:hover {
    transform: scale(1.05);
}

.orbit {
    position: absolute;
    border: 1px dashed rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform-origin: center;
    transition: all 0.3s ease;
}

.light-mode .orbit {
    border-color: rgba(0, 0, 0, 0.2);
}

.planet-container {
    position: absolute;
    transform-origin: center;
}

.planet {
    position: absolute;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    z-index: 2;
    color: white;
    user-select: none;
}

.planet.dragging {
    opacity: 0.7;
    transform: scale(1.2);
    z-index: 100;
}

.planet:hover {
    transform: scale(1.1);
    z-index: 3;
}

.planet.priority-low {
    background: linear-gradient(135deg, #4fc3f7, #01579b);
    box-shadow: 0 0 15px #4fc3f7;
}

.planet.priority-medium {
    background: linear-gradient(135deg, #66bb6a, #2e7d32);
    box-shadow: 0 0 15px #66bb6a;
}

.planet.priority-high {
    background: linear-gradient(135deg, #ff7043, #bf360c);
    box-shadow: 0 0 15px #ff7043;
}

.planet.priority-critical {
    background: linear-gradient(135deg, #f44336, #b71c1c);
    box-shadow: 0 0 20px #f44336;
    animation: pulse 2s infinite;
}

.planet.status-planned {
    opacity: 0.8;
    filter: grayscale(30%);
}

.planet.status-in-progress {
    border: 2px solid #ffeb3b;
}

.planet.status-completed {
    background: linear-gradient(135deg, #b39ddb, #4527a0);
    box-shadow: 0 0 15px #b39ddb;
}

.planet.status-blocked {
    background: linear-gradient(135deg, #9e9e9e, #424242);
    box-shadow: 0 0 15px #9e9e9e;
    animation: shake 0.5s infinite alternate;
}

.planet.difficulty-easy {
    width: 30px;
    height: 30px;
}

.planet.difficulty-medium {
    width: 45px;
    height: 45px;
}

.planet.difficulty-hard {
    width: 60px;
    height: 60px;
}

.planet.difficulty-epic {
    width: 80px;
    height: 80px;
    font-size: 1.5rem;
}

.progress-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid #ffeb3b;
    opacity: 0.5;
    transform: rotate(-90deg);
}

.control-panel {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
    z-index: 10;
}

.control-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background: #ff8906;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.control-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.control-btn.btn-danger {
    background: #f44336;
}

.status-panel {
    position: fixed;
    top: 20px;
    left: 20px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 10px;
    padding: 15px;
    display: flex;
    gap: 20px;
    z-index: 10;
    backdrop-filter: blur(5px);
}

.light-mode .status-panel {
    background: rgba(255, 255, 255, 0.8);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.status-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.status-count {
    font-size: 1.5rem;
    font-weight: bold;
    color: #ff8906;
}

.status-label {
    font-size: 0.8rem;
    opacity: 0.8;
}

.search-panel {
    position: fixed;
    top: 80px;
    left: 20px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 10px;
    padding: 10px;
    z-index: 10;
    backdrop-filter: blur(5px);
    display: flex;
    gap: 10px;
}

.light-mode .search-panel {
    background: rgba(255, 255, 255, 0.8);
}

.search-panel input {
    padding: 8px;
    width: 200px;
    border-radius: 5px;
}

.zoom-level {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: rgba(0, 0, 0, 0.7);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    z-index: 10;
    backdrop-filter: blur(5px);
}

.light-mode .zoom-level {
    background: rgba(255, 255, 255, 0.8);
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 100;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: #1a1a2e;
    padding: 20px;
    border-radius: 10px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
    max-height: 90vh;
    overflow-y: auto;
}

.light-mode .modal-content {
    background: #ffffff;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-title {
    font-size: 1.5rem;
    color: #fffffe;
}

.light-mode .modal-title {
    color: #232323;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #fffffe;
}

.light-mode .close-btn {
    color: #232323;
}

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

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

input, textarea, select {
    width: 100%;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #333;
    background: #16213e;
    color: #fffffe;
}

.light-mode input, 
.light-mode textarea, 
.light-mode select {
    background: #f0f0f0;
    color: #232323;
    border: 1px solid #ddd;
}

.action-btns {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}

.btn {
    padding: 8px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
}

.btn-primary {
    background: #ff8906;
    color: white;
}

.btn-secondary {
    background: #333;
    color: white;
}

.btn-danger {
    background: #f44336;
    color: white;
}

.feature-detail-item {
    margin-bottom: 15px;
}

.feature-detail-label {
    font-weight: bold;
    color: #ff8906;
    margin-bottom: 5px;
}

.feature-detail-value {
    margin-left: 10px;
}

.tabs {
    display: flex;
    margin-bottom: 15px;
    border-bottom: 1px solid #333;
}

.tab-btn {
    padding: 8px 15px;
    background: none;
    border: none;
    cursor: pointer;
    color: #fffffe;
    border-bottom: 2px solid transparent;
}

.light-mode .tab-btn {
    color: #232323;
}

.tab-btn.active {
    border-bottom: 2px solid #ff8906;
    font-weight: bold;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

textarea {
    width: 100%;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 10px;
    background: #16213e;
    color: #fffffe;
    border: 1px solid #333;
}

.light-mode textarea {
    background: #f0f0f0;
    color: #232323;
    border: 1px solid #ddd;
}

.import-warning {
    color: #f44336;
    margin-top: 10px;
    font-size: 0.9rem;
}

.tooltip {
    position: absolute;
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 8px 12px;
    border-radius: 5px;
    font-size: 0.9rem;
    z-index: 100;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s;
    max-width: 250px;
}

.comet {
    position: absolute;
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, #ffffff, #4fc3f7);
    border-radius: 50%;
    box-shadow: 0 0 10px #4fc3f7;
    z-index: 5;
    opacity: 0;
    pointer-events: none;
}

.comet-tail {
    position: absolute;
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, #4fc3f7, transparent);
    transform-origin: left;
}

@keyframes orbit {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

@keyframes shake {
    0% { transform: translateX(0); }
    25% { transform: translateX(-3px); }
    75% { transform: translateX(3px); }
    100% { transform: translateX(0); }
}

@keyframes comet {
    0% { transform: translate(0, 0); opacity: 1; }
    100% { transform: translate(100vw, -100vh); opacity: 0; }
}

.priority-low { --animation-duration: 25s; }
.priority-medium { --animation-duration: 20s; }
.priority-high { --animation-duration: 15s; }
.priority-critical { --animation-duration: 10s; }
.status-completed { --animation-duration: 40s; }

@media (max-width: 768px) {
    .sun {
        width: 120px;
        height: 120px;
    }
    
    .sun-title {
        font-size: 1rem;
    }
    
    .sun-description {
        font-size: 0.7rem;
    }
    
    .control-panel {
        bottom: 10px;
        right: 10px;
        flex-wrap: wrap;
        justify-content: flex-end;
        width: calc(100% - 20px);
    }
    
    .control-btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .status-panel {
        top: 10px;
        left: 10px;
        padding: 10px;
        gap: 15px;
        flex-wrap: wrap;
    }
    
    .status-count {
        font-size: 1.2rem;
    }
    
    .status-label {
        font-size: 0.7rem;
    }
    
    .zoom-level {
        bottom: 70px;
    }
    
    .search-panel {
        top: 70px;
        width: calc(100% - 40px);
    }
    
    .search-panel input {
        width: 100%;
    }
}