:root {
    --bg-dark: #0a0f0d;
    --neon-green: #00ff9d;
    --neon-blue: #00f3ff;
    --diamond-white: #e6ffff;
    --panel-bg: rgba(10, 20, 15, 0.7);
    --glass-border: 1px solid rgba(0, 255, 157, 0.3);
    --font-header: 'Orbitron', sans-serif;
    --font-body: 'Rajdhani', sans-serif;
}

* {
    box-sizing: border-box;
    user-select: none;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-dark);
    background-image: url('bg.jpg');
    background-size: cover;
    background-position: center;
    color: #fff;
    font-family: var(--font-body);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: rgba(0, 0, 0, 0.8);
    border-bottom: 2px solid var(--neon-green);
    backdrop-filter: blur(5px);
    z-index: 10;
}

.game-title {
    font-family: var(--font-header);
    font-size: 1.5rem;
    color: var(--neon-green);
    text-shadow: 0 0 10px var(--neon-green);
}

.hud-stats {
    display: flex;
    gap: 2rem;
}

.stat-box {
    text-align: center;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--neon-blue);
    text-transform: uppercase;
}

.stat-value {
    font-size: 1.2rem;
    font-weight: bold;
    font-family: var(--font-header);
}

.exit-btn {
    color: #fff;
    text-decoration: none;
    border: 1px solid #555;
    padding: 5px 15px;
    border-radius: 4px;
    transition: all 0.2s;
}

.exit-btn:hover {
    background: #333;
    border-color: #fff;
}

main {
    flex: 1;
    display: flex;
    padding: 2rem;
    gap: 2rem;
    overflow: hidden;
}

.panel-left,
.panel-right {
    flex: 1;
    background: var(--panel-bg);
    backdrop-filter: blur(10px);
    border: var(--glass-border);
    border-radius: 10px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-width: 250px;
}

.panel-center {
    flex: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    /* Keep controls at bottom, reactor in clear space */
    position: relative;
}

/* Info Cards */
.info-card {
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--neon-blue);
    border-radius: 5px;
    padding: 1rem;
}

.card-header {
    font-family: var(--font-header);
    color: var(--neon-green);
    margin-bottom: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 0.2rem;
}

.card-body {
    font-size: 1rem;
    line-height: 1.4;
}

#learn-more-link {
    color: var(--neon-blue);
    font-size: 0.9rem;
    display: inline-block;
    margin-top: 0.5rem;
}

/* Reactor Area */
#reactor-container {
    flex: 1;
    width: 100%;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

#co2-cloud {
    font-size: 4rem;
    position: absolute;
    top: 20%;
    opacity: 0;
    transition: all 0.5s;
}

.cloud-anim {
    animation: suckIn 1s forwards;
}

@keyframes suckIn {
    0% {
        transform: translateY(0) scale(1);
        opacity: 1;
    }

    100% {
        transform: translateY(100px) scale(0);
        opacity: 0;
    }
}

#diamond-output {
    font-size: 3rem;
    position: absolute;
    bottom: 30%;
    opacity: 0;
}

.diamond-anim {
    animation: popOut 1s forwards;
}

@keyframes popOut {
    0% {
        transform: scale(0);
        opacity: 0;
    }

    50% {
        transform: scale(1.2);
        opacity: 1;
    }

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

/* Buttons */
.main-action-btn {
    background: rgba(0, 255, 157, 0.1);
    border: 2px solid var(--neon-green);
    color: var(--neon-green);
    font-family: var(--font-header);
    font-size: 1.5rem;
    padding: 1rem 3rem;
    cursor: pointer;
    border-radius: 50px;
    transition: all 0.2s;
    margin-bottom: 1rem;
    box-shadow: 0 0 15px rgba(0, 255, 157, 0.2);
}

.main-action-btn:hover {
    background: var(--neon-green);
    color: #000;
    box-shadow: 0 0 30px rgba(0, 255, 157, 0.6);
    transform: scale(1.05);
}

.main-action-btn:active {
    transform: scale(0.95);
}

.secondary-action-btn {
    background: rgba(0, 243, 255, 0.1);
    border: 1px solid var(--neon-blue);
    color: var(--neon-blue);
    font-family: var(--font-header);
    font-size: 1rem;
    padding: 0.8rem 2rem;
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.2s;
}

.secondary-action-btn:hover:not(:disabled) {
    background: var(--neon-blue);
    color: #000;
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.4);
}

.secondary-action-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    border-color: #555;
    color: #777;
}

/* Upgrades */
.upgrade-item {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid #444;
    padding: 0.8rem;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.upgrade-item:hover:not(.disabled) {
    border-color: var(--neon-green);
    background: rgba(0, 255, 157, 0.1);
}

.upgrade-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.upgrade-info {
    display: flex;
    flex-direction: column;
}

.upgrade-name {
    font-weight: bold;
    color: #fff;
}

.upgrade-cost {
    font-size: 0.8rem;
    color: var(--neon-green);
}

.upgrade-count {
    font-family: var(--font-header);
    font-size: 1.2rem;
    color: #888;
}