@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=Orbitron:wght@400;700;900&display=swap');

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

:root {
    --bg: #020408;
    --panel: rgba(8, 16, 28, 0.92);
    --border: rgba(80, 160, 255, 0.18);
    --accent1: #4af;
    --accent2: #f84;
    --accent3: #4fa;
    --text: #c8dff5;
    --dim: #4a6080;
    --glow1: rgba(64, 170, 255, 0.4);
    --glow2: rgba(255, 136, 64, 0.4);
    --glow3: rgba(64, 255, 160, 0.4);
}

html, body {
    width: 100%;
    height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: 'Space Mono', monospace;
    overflow: hidden;
    user-select: none;
}

#app {
    display: flex;
    width: 100vw;
    height: 100vh;
}

#sidebar {
    width: 260px;
    min-width: 260px;
    background: var(--panel);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 24px 18px;
    gap: 20px;
    backdrop-filter: blur(12px);
    z-index: 10;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

#sidebar::-webkit-scrollbar {
    width: 4px;
}
#sidebar::-webkit-scrollbar-track {
    background: transparent;
}
#sidebar::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

#sidebar h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 15px;
    font-weight: 900;
    color: var(--accent1);
    letter-spacing: 2px;
    text-transform: uppercase;
    line-height: 1.3;
}
#sidebar h1 span {
    color: var(--text);
    font-weight: 400;
}

.phase-indicator {
    font-size: 10px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--dim);
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.3);
} 
.phase-indicator b {
    color: var(--accent1);
}

.divider {
    border: none;
    border-top: 1px solid var(--border);
}

.mass-section {
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.mass-section label {
    font-size: 10px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--dim);
    margin-bottom: 2px;
}

.body-mass {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.body-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 6px;
}
.dot-1 { background: var(--accent1); box-shadow: 0 0 6px var(--glow1); }
.dot-2 { background: var(--accent2); box-shadow: 0 0 6px var(--glow2); }
.dot-3 { background: var(--accent3); box-shadow: 0 0 6px var(--glow3); }

.mass-val {
    font-family: 'Orbitron', sans-serif;
    font-size: 11px;
    color: var(--text);
}

input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    height: 4px;
    border-radius: 2px;
    background: var(--border);
    outline: none;
    cursor: pointer;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.15s;
}
input[type=range]::-webkit-slider-thumb:hover {
    transform: scale(1.3);
}

.slider-1::-webkit-slider-thumb { background: var(--accent1); box-shadow: 0 0 8px var(--glow1); }
.slider-2::-webkit-slider-thumb { background: var(--accent2); box-shadow: 0 0 8px var(--glow2); }
.slider-3::-webkit-slider-thumb { background: var(--accent3); box-shadow: 0 0 8px var(--glow3); }

.slider-1 { accent-color: var(--accent1); }
.slider-2 { accent-color: var(--accent2); }
.slider-3 { accent-color: var(--accent3); }

.btn {
    font-family: 'Orbitron', sans-serif;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 10px 14px;
    border-radius: 4px;
    border: 1px solid;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
    background: transparent;
}

.btn-primary {
    border-color: var(--accent1);
    color: var(--accent1);
}
.btn-primary:hover:not(:disabled) {
    background: var(--glow1);
    box-shadow: 0 0 20px var(--glow1);
}
.btn-primary:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.btn-danger {
    border-color: #f55;
    color: #f55;
}
.btn-danger:hover {
    background: rgba(255, 80, 80, 0.15);
    box-shadow: 0 0 20px rgba(255, 80, 80, 0.3);
}

.stats {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    font-size: 10px;
    color: var(--dim);
}
.stat-row span:last-child {
    color: var(--text);
    font-family: 'Orbitron', sans-serif;
    font-size: 10px;
}

#status-msg {
    font-size: 10px;
    color: var(--dim);
    line-height: 1.6;
    border: 1px solid var(--border);
    padding: 10px;
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.2);
    min-height: 60px;
}

#canvas-wrap {
    flex: 1;
    position: relative;
    overflow: hidden;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: crosshair;
}

#overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(2, 4, 8, 0.85);
    backdrop-filter: blur(4px);
    z-index: 5;
    gap: 16px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.4s;
}
#overlay.visible {
    opacity: 1;
    pointer-events: all;
}
#overlay h2 {
    font-family: 'Orbitron', sans-serif;
    font-size: 28px;
    font-weight: 900;
    color: var(--accent1);
    letter-spacing: 4px;
    text-align: center;
    white-space: pre;
}
#overlay p {
    font-size: 13px;
    color: var(--dim);
    letter-spacing: 1px;
    text-align: center;
}
#overlay .btn {
    width: auto;
    padding: 12px 32px;
    font-size: 13px;
    pointer-events: all;
}

.steps {
    display: flex;
    gap: 4px;
    margin-top: 4px;
}

.step {
    flex: 1;
    height: 3px;
    border-radius: 2px;
    background: var(--border);
    transition: background 0.3s;
}
.step.done {
    background: var(--accent1);
    box-shadow: 0 0 6px;
}
.step.active {
    background: var(--accent2);
    box-shadow: 0 0 6px var(--glow2);
    animation: pulse-step 1s infinite;
}

@keyframes pulse-step {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.5; }
}

.score-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.3);
}

.score-label {
    font-size: 10px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--dim);
}

.score-value {
    font-family: 'Orbitron', sans-serif;
    font-size: 18px;
    font-weight: 700;
    color: var(--accent2);
    text-shadow: 0 0 12px var(--glow2);
    letter-spacing: 1px;
    min-width: 60px;
    text-align: right;
}

.scoreboard {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-shrink: 0;
}
.scoreboard label {
    font-size: 10px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--dim);
}

#scoreboard-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.sb-empty {
    font-size: 10px;
    color: var(--dim);
    padding: 6px 0;
    opacity: 0.6;
}

.sb-row {
    display: grid;
    grid-template-columns: 28px 1fr auto;
    align-items: center;
    gap: 6px;
    font-size: 10px;
    padding: 5px 8px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    transition: box-shadow 0.3s;
}

.sb-rank {
    font-family: 'Orbitron', sans-serif;
    font-size: 9px;
    color: var(--dim);
}

.sb-score {
    font-family: 'Orbitron', sans-serif;
    font-size: 11px;
    font-weight: 700;
    color: var(--text);
}

.sb-meta {
    font-size: 9px;
    color: var(--dim);
    white-space: nowrap;
}

.sb-row.sb-gold {
    background: rgba(255, 200, 50, 0.07);
    border-color: rgba(255, 200, 50, 0.4);
    box-shadow: 0 0 10px rgba(255, 200, 50, 0.15), inset 0 0 8px rgba(255, 200, 50, 0.05);
}
.sb-gold .sb-rank {
    color: #ffd700;
    text-shadow: 0 0 8px rgba(255, 215, 0, 0.8);
}
.sb-gold .sb-score {
    color: #ffd700;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.7);
}
.sb-gold .sb-meta {
    color: rgba(255, 215, 0, 0.55);
}

.sb-row.sb-silver {
    background: rgba(192, 210, 230, 0.05);
    border-color: rgba(192, 210, 230, 0.3);
    box-shadow: 0 0 8px rgba(192, 210, 230, 0.1), inset 0 0 6px rgba(192, 210, 230, 0.04);
}
.sb-silver .sb-rank {
    color: #c0d2e6;
    text-shadow: 0 0 6px rgba(192, 210, 230, 0.7);
}
.sb-silver .sb-score {
    color: #c0d2e6;
    text-shadow: 0 0 8px rgba(192, 210, 230, 0.6);
}
.sb-silver .sb-meta {
    color: rgba(192, 210, 230, 0.5);
}

.sb-row.sb-bronze {
    background: rgba(200, 120, 60, 0.06);
    border-color: rgba(200, 120, 60, 0.3);
    box-shadow: 0 0 8px rgba(200, 120, 60, 0.1), inset 0 0 6px rgba(200, 120, 60, 0.04);
}
.sb-bronze .sb-rank {
    color: #cd7f32;
    text-shadow: 0 0 8px rgba(205, 127, 50, 0.7);
}
.sb-bronze .sb-score {
    color: #cd7f32;
    text-shadow: 0 0 8px rgba(205, 127, 50, 0.6);
}
.sb-bronze .sb-meta {
    color: rgba(205, 127, 50, 0.5);
}

#stat-score {
    color: var(--accent2) !important;
}

.combo-wrap {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.combo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.combo-title {
    font-size: 10px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--dim);
}

.combo-label {
    font-family: 'Orbitron', sans-serif;
    font-size: 12px;
    font-weight: 700;
    color: var(--accent1);
    transition: color 0.3s;
}

.combo-track {
    width: 100%;
    height: 5px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
}

.combo-fill {
    height: 100%;
    width: 0%;
    border-radius: 3px;
    background: var(--accent1);
    box-shadow: 0 0 6px var(--glow1);
    transition: width 0.1s linear, background 0.3s, box-shadow 0.3s;
}

.score-explainer {
    font-size: 9.5px;
    line-height: 1.6;
    color: var(--dim);
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.2);
}
.score-explainer b {
    color: var(--accent1);
}

.btn-end {
    border-color: #f0c040;
    color: #f0c040;
}
.btn-end:hover:not(:disabled) {
    background: rgba(240, 192, 64, 0.15);
    box-shadow: 0 0 20px rgba(240, 192, 64, 0.3);
}
.btn-end:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}