:root {
    --bg-color: #05050a;
    --core-color: #00f3ff;
    --core-glow: rgba(0, 243, 255, 0.6);
    --gold-color: #ffd700;
    --gold-glow: rgba(255, 215, 0, 0.6);
    --prestige-color: #b026ff;
    --prestige-glow: rgba(176, 38, 255, 0.6);
    --text-main: #e0fbfc;
    --text-muted: #8d99ae;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --upgrade-hover: rgba(0, 243, 255, 0.1);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Outfit', sans-serif;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(0, 243, 255, 0.05), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(176, 38, 255, 0.05), transparent 25%);
    user-select: none;
}

#game-container {
    display: flex;
    flex-direction: row;
    width: 90%;
    max-width: 1200px;
    height: 85vh;
    gap: 40px;
}

.core-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
}

.top-controls {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: flex-start;
    gap: 10px;
    padding: 10px;
}

#sound-toggle, #lang-toggle {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
    padding: 8px 15px;
    border-radius: 20px;
    cursor: pointer;
    font-family: 'Outfit', sans-serif;
    transition: all 0.3s;
}

#sound-toggle:hover, #lang-toggle:hover {
    color: var(--text-main);
    border-color: var(--core-color);
}

.prestige-info {
    position: absolute;
    top: 10px;
    right: 10px;
    text-align: right;
    font-size: 0.9rem;
    color: var(--prestige-color);
    text-shadow: 0 0 5px var(--prestige-glow);
}

#score-display {
    font-size: 5rem;
    font-weight: 900;
    text-shadow: 0 0 20px var(--core-glow);
    margin-bottom: 5px;
    transition: transform 0.1s;
}

.score-label {
    font-size: 1.2rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 30px;
}

.core-clicker-wrapper {
    position: relative;
    width: 250px;
    height: 250px;
    display: flex;
    justify-content: center;
    align-items: center;
}

#core-button {
    background: none;
    border: none;
    cursor: pointer;
    outline: none;
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 0.1s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

#core-button:active {
    transform: scale(0.95);
}

.core-orb {
    width: 120px;
    height: 120px;
    background: var(--core-color);
    border-radius: 50%;
    box-shadow: 
        0 0 30px var(--core-glow),
        inset 0 0 20px #fff;
    animation: pulse 3s infinite alternate;
}

.core-ring {
    position: absolute;
    border-radius: 50%;
    border: 2px solid var(--core-glow);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.core-ring-1 {
    width: 180px;
    height: 180px;
    border-top-color: transparent;
    border-bottom-color: transparent;
    animation: spin 8s linear infinite;
}

.core-ring-2 {
    width: 220px;
    height: 220px;
    border-left-color: transparent;
    border-right-color: transparent;
    animation: spin-reverse 12s linear infinite;
}

/* Golden Core */
#golden-core-container {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    pointer-events: none;
}

.golden-core {
    position: absolute;
    width: 40px; height: 40px;
    background: var(--gold-color);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--gold-glow), inset 0 0 10px #fff;
    cursor: pointer;
    pointer-events: auto;
    animation: goldPulse 1s infinite alternate, floatUp 4s forwards linear;
    z-index: 20;
}

@keyframes goldPulse {
    0% { transform: scale(1); }
    100% { transform: scale(1.2); box-shadow: 0 0 30px var(--gold-glow); }
}

.stats {
    margin-top: 40px;
    font-size: 1.1rem;
    color: var(--text-muted);
    background: var(--glass-bg);
    padding: 15px 30px;
    border-radius: 30px;
    border: 1px solid var(--glass-border);
    display: flex;
    gap: 20px;
}

#prestige-button {
    margin-top: 30px;
    background: rgba(176, 38, 255, 0.1);
    border: 1px solid var(--prestige-color);
    color: var(--prestige-color);
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 1.1rem;
    font-weight: 700;
    font-family: 'Outfit', sans-serif;
    cursor: pointer;
    transition: all 0.3s;
    text-shadow: 0 0 10px var(--prestige-glow);
    box-shadow: 0 0 15px rgba(176, 38, 255, 0.2);
}

#prestige-button:hover:not(.disabled) {
    background: var(--prestige-color);
    color: #fff;
    box-shadow: 0 0 25px var(--prestige-glow);
    transform: translateY(-2px);
}

#prestige-button.disabled {
    opacity: 0.3;
    cursor: not-allowed;
    border-color: var(--text-muted);
    color: var(--text-muted);
    text-shadow: none;
    box-shadow: none;
}

.upgrades-section {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.upgrades-section h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    font-weight: 700;
    text-shadow: 0 0 10px rgba(255,255,255,0.2);
}

.glass-panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 20px;
    flex: 1;
    overflow-y: auto;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.glass-panel::-webkit-scrollbar { width: 8px; }
.glass-panel::-webkit-scrollbar-track { background: rgba(255,255,255,0.02); border-radius: 4px; }
.glass-panel::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }

.upgrade-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upgrade-item:hover:not(.disabled) {
    background: var(--upgrade-hover);
    border-color: var(--core-glow);
    transform: translateY(-2px);
}

.upgrade-item.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.upgrade-info h3 { font-size: 1.2rem; font-weight: 500; margin-bottom: 4px; }
.upgrade-info p { font-size: 0.85rem; color: var(--text-muted); }
.upgrade-cost { display: flex; flex-direction: column; align-items: flex-end; }
.cost-amount { font-weight: 700; color: var(--core-color); font-size: 1.1rem; }
.owned-amount { font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; }

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes spin-reverse {
    0% { transform: translate(-50%, -50%) rotate(360deg); }
    100% { transform: translate(-50%, -50%) rotate(0deg); }
}

@keyframes pulse {
    0% { transform: scale(1); box-shadow: 0 0 30px var(--core-glow), inset 0 0 20px #fff; }
    100% { transform: scale(1.05); box-shadow: 0 0 50px var(--core-glow), inset 0 0 30px #fff; }
}

.floating-text {
    position: absolute;
    color: var(--core-color);
    font-weight: 700;
    font-size: 1.5rem;
    pointer-events: none;
    text-shadow: 0 0 10px var(--core-glow);
    animation: floatUp 1s ease-out forwards;
    z-index: 10;
}

.floating-text.gold {
    color: var(--gold-color);
    text-shadow: 0 0 15px var(--gold-glow);
    font-size: 2rem;
}

@keyframes floatUp {
    0% { opacity: 1; transform: translateY(0) scale(1); }
    100% { opacity: 0; transform: translateY(-50px) scale(1.5); }
}

/* Modal */
.modal {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    opacity: 1;
    transition: opacity 0.3s;
}

.modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background: #0d0d1a;
    padding: 40px;
    text-align: center;
    max-width: 400px;
    border: 1px solid var(--core-color);
    box-shadow: 0 0 30px var(--core-glow);
}

.modal-content h2 { margin-bottom: 15px; color: var(--core-color); }
.modal-content h3 { font-size: 2rem; margin: 20px 0; color: var(--text-main); text-shadow: 0 0 10px var(--core-glow); }

#close-modal-btn {
    background: rgba(0, 243, 255, 0.1);
    border: 1px solid var(--core-color);
    color: var(--core-color);
    padding: 10px 30px;
    border-radius: 20px;
    font-size: 1.1rem;
    cursor: pointer;
    font-family: 'Outfit', sans-serif;
    transition: all 0.2s;
}

#close-modal-btn:hover {
    background: var(--core-color);
    color: #000;
}

@media (max-width: 768px) {
    #game-container { flex-direction: column; height: auto; padding: 20px 0; }
    .upgrades-section { height: 50vh; }
}