:root {
    --ui-bg-color: rgba(25, 35, 50, 0.7);
    --ui-border-color: rgba(120, 180, 255, 0.3);
    --accent-color: #00aaff;
    --text-color: #e0e5f0;
    --text-secondary-color: #a0a5b0;
}

body {
    margin: 0;
    overflow: hidden;
    background-color: #000;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    overscroll-behavior: none;
}

#solarSystemCanvas { display: block; }

/* --- PANEL STYLING --- */
.panel {
    background-color: var(--ui-bg-color);
    border: 1px solid var(--ui-border-color);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 10;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#info-panel { position: absolute; top: 20px; left: 20px; width: 280px; }
#control-panel-container { position: absolute; top: 20px; right: 20px; display: flex; flex-direction: column; align-items: flex-end; }
#control-panel { max-height: calc(100vh - 100px); overflow-y: auto; margin-top: 10px; width: 300px; }

.panel.hidden { opacity: 0; pointer-events: none; }
#info-panel.hidden { transform: translateY(-20px); }
#control-panel.hidden { transform: translateX(20px); }

/* --- UI ELEMENT STYLING --- */
h2, h3 { margin-top: 0; color: #fff; border-bottom: 1px solid var(--ui-border-color); padding-bottom: 10px; }
#info-data, #tour-text { white-space: pre-wrap; line-height: 1.6; color: var(--text-secondary-color); }

.control-group { margin-bottom: 20px; display: flex; flex-direction: column; }
.control-group label { margin-bottom: 8px; font-size: 0.9em; color: var(--text-secondary-color); }
.button-group { display: flex; gap: 10px; margin-top: 15px; }

button { padding: 12px 18px; background-color: var(--accent-color); border: none; color: white; font-weight: bold; border-radius: 8px; cursor: pointer; transition: background-color 0.2s ease, transform 0.1s ease; flex-grow: 1; }
button:hover { background-color: #0088cc; }
button:active { transform: scale(0.98); }

#toggle-controls { background-color: transparent; border: 1px solid var(--ui-border-color); backdrop-filter: blur(5px); flex-grow: 0; }
#toggle-controls:hover { background-color: var(--ui-bg-color); }
button.secondary { background-color: var(--ui-bg-color); border: 1px solid var(--ui-border-color); }
button.secondary:hover { background-color: rgba(25, 35, 50, 1); }

input[type="date"] { background-color: rgba(0,0,0,0.3); border: 1px solid var(--ui-border-color); color: var(--text-color); padding: 8px; border-radius: 5px; width: calc(100% - 18px); margin-bottom: 10px; }
input[type="range"] { -webkit-appearance: none; width: 100%; height: 4px; background: var(--ui-border-color); border-radius: 5px; outline: none; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 18px; height: 18px; background: var(--accent-color); cursor: pointer; border-radius: 50%; border: 2px solid #fff; }

#tooltip { position: absolute; background-color: rgba(0, 0, 0, 0.85); padding: 8px 12px; border-radius: 6px; color: #fff; pointer-events: none; z-index: 20; transition: opacity 0.2s; }

/* --- GUIDED TOUR PANEL --- */
#tour-panel { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); width: clamp(300px, 50vw, 600px); }

/* --- COMPARISON MODAL --- */
#comparison-modal-backdrop { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); backdrop-filter: blur(5px); display: flex; justify-content: center; align-items: center; z-index: 99; transition: opacity 0.3s ease; }
#comparison-modal-backdrop.hidden { opacity: 0; pointer-events: none; }
#comparison-panel { position: relative; width: clamp(300px, 80vw, 900px); }
#comparison-content { display: flex; gap: 20px; }
.comparison-column { flex: 1; text-align: center; }
.comparison-column canvas { width: 100%; height: auto; max-width: 200px; margin: 0 auto; display: block; }
.comparison-column table { width: 100%; margin-top: 15px; border-collapse: collapse; }
.comparison-column td { padding: 8px; text-align: left; border-bottom: 1px solid var(--ui-border-color); }
.comparison-column td:first-child { color: var(--text-secondary-color); }
.close-btn { position: absolute; top: 10px; right: 15px; font-size: 2.5em; background: none; border: none; color: var(--text-secondary-color); cursor: pointer; padding: 0; line-height: 1; }