:root {
    --bg-color: #0c0f1a;
    --container-bg: rgba(26, 29, 46, 0.98);
    --primary-accent: #00aaff;
    --secondary-accent: #ffaa00;
    --text-color: #e0e5f0;
    --text-muted: #8a99b5;
    --border-color: #343a5e;
    --input-bg: #10121e;
    --shadow-color: rgba(0, 170, 255, 0.2);
    --success-color: #28a745;
    --error-color: #dc3545;
    --border-radius: 12px;
    --font-main: 'Roboto', sans-serif;
    --font-title: 'Orbitron', sans-serif;

    /* XLS Calculator Colors */
    --xls-bg-orange: rgba(255, 170, 0, 0.15);
    --xls-bg-green: rgba(40, 167, 69, 0.15);
    --xls-border-orange: #ffaa00;
    --xls-border-green: #28a745;
    --xls-text-red: #ff4444;
}

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

body {
    font-family: var(--font-main);
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100vh;
    padding: 2rem 1rem;
    position: relative;
    overflow: hidden;
}

#constellation-canvas { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
.hidden { display: none !important; }

/* Loading Overlay */
#loading-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(12, 15, 26, 0.95);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.spinner {
    width: 50px; height: 50px;
    border: 5px solid var(--border-color);
    border-top: 5px solid var(--primary-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

main {
    position: relative; z-index: 10; max-width: 1200px; width: 100%;
    padding: 0; background-color: var(--container-bg); border-radius: var(--border-radius);
    border: 1px solid var(--border-color); box-shadow: 0 8px 32px 0 var(--shadow-color);
    text-align: center; transition: all 0.3s ease; flex: 1; display: flex; flex-direction: column;
    max-height: calc(100vh - 4rem);
    overflow: hidden;
}

.app-header { display: flex; justify-content: flex-end; align-items: center; padding: 1rem; border-bottom: 1px solid var(--border-color); background: rgba(0,0,0,0.2); }
.header-controls { display: flex; gap: 1.5rem; align-items: center; }

/* Toggle Switch */
.toggle-switch { position: relative; display: inline-flex; align-items: center; cursor: pointer; gap: 0.5rem; color: var(--text-muted); font-size: 0.9rem; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.slider { position: relative; display: inline-block; width: 40px; height: 20px; background-color: var(--input-bg); border: 1px solid var(--border-color); border-radius: 20px; transition: .4s; }
.slider:before { position: absolute; content: ""; height: 14px; width: 14px; left: 2px; bottom: 2px; background-color: var(--text-muted); border-radius: 50%; transition: .4s; }
input:checked + .slider { background-color: var(--primary-accent); border-color: var(--primary-accent); }
input:checked + .slider:before { transform: translateX(20px); background-color: #fff; }
.toggle-label { font-family: var(--font-title); }

#language-selector { background-color: var(--input-bg); border: 1px solid var(--border-color); color: var(--text-color); border-radius: 6px; padding: 0.25rem 0.5rem; font-size: 0.8rem; }
#language-selector option { background-color: #0c0f1a; color: #e0e5f0; }

h1, h2, h3, h4 { font-family: var(--font-title); color: var(--primary-accent); letter-spacing: 1.5px; text-shadow: 0 0 5px var(--shadow-color); }
h1 { font-size: 2.5rem; margin: 0 0 1rem 0; }
h2 { font-size: 1.8rem; margin: 0; text-align: left; }
h3 { font-size: 1.5rem; margin-bottom: 1rem; }
p { color: var(--text-muted); font-size: 1.1rem; max-width: 600px; margin: 0 auto 2.5rem auto; }

.main-content { flex: 1; display: flex; flex-direction: column; min-height: 0; padding: 2rem; overflow-y: auto; }

/* Version Selector */
.version-selector-container { display: flex; gap: 2rem; justify-content: center; align-items: stretch; margin-bottom: 2rem; }
.version-card { background: rgba(255,255,255,0.05); border: 1px solid var(--border-color); border-radius: var(--border-radius); padding: 2rem; flex: 1; max-width: 320px; cursor: pointer; transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease; text-align: center; }
.version-card:hover { transform: translateY(-5px); border-color: var(--primary-accent); box-shadow: 0 10px 30px 0 var(--shadow-color); }
.version-card h3 { margin: 0 0 0.5rem 0; }
.version-card p { font-size: 0.9rem; margin-bottom: 0; color: var(--text-muted); text-align: center; max-width: 100%; }

.comparison-section { display: flex; gap: 2rem; text-align: left; margin-bottom: 2rem; background-color: var(--input-bg); padding: 1.5rem; border-radius: var(--border-radius); }
.comparison-column { flex: 1; }
.comparison-column ul { padding-left: 1.2rem; margin: 0; font-size: 0.9rem; color: var(--text-muted); }
.comparison-column li { margin-bottom: 0.5rem; }

.button { background: none; border: 1px solid var(--border-color); color: var(--text-muted); padding: 0.75rem 1.5rem; border-radius: 8px; cursor: pointer; font-size: 1rem; transition: all 0.2s ease; font-family: var(--font-title); }
.button:hover { color: var(--text-color); border-color: var(--primary-accent); background-color: var(--shadow-color); }
.button.primary { border-color: var(--primary-accent); color: var(--primary-accent); }
.button:disabled { opacity: 0.5; cursor: not-allowed; border-color: var(--border-color); color: var(--text-muted); background: none; }

/* --- Wizard Layout (New) --- */
#config-wizard { display: flex; flex-direction: column; height: 100%; text-align: left; }
.wizard-layout { display: flex; flex: 1; gap: 2rem; min-height: 0; }

.wizard-sidebar { flex: 0 0 220px; display: flex; flex-direction: column; gap: 1rem; border-right: 1px solid var(--border-color); padding-right: 1rem; overflow-y: auto; }
#wizard-categories { display: flex; flex-direction: column; gap: 0.5rem; }
.category-btn { text-align: left; padding: 0.8rem 1rem; background: none; border: 1px solid transparent; color: var(--text-muted); border-radius: 8px; cursor: pointer; transition: all 0.2s; font-family: var(--font-title); font-size: 0.9rem; }
.category-btn:hover { background: var(--input-bg); color: var(--text-color); }
.category-btn.active { background: var(--shadow-color); color: var(--primary-accent); border-color: var(--primary-accent); }
.category-btn.disabled { opacity: 0.3; cursor: not-allowed; }

.wizard-content-area { flex: 1; display: flex; flex-direction: column; min-height: 0; overflow: hidden; }
.wizard-header-inline { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; border-bottom: 1px solid var(--border-color); padding-bottom: 1rem; }
.step-container { flex: 1; overflow-y: auto; padding-right: 1rem; }

.form-group { margin-bottom: 1.5rem; display: flex; flex-direction: column; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }

.form-group label { font-size: 1rem; font-weight: bold; color: var(--text-color); margin-bottom: 0.5rem; display: flex; align-items: center; }
.form-group label code { margin-left: 8px; font-size: 0.8em; opacity: 0.6; background: var(--border-color); padding: 0.1em 0.4em; border-radius: 4px; }
.info-icon { display: inline-block; width: 18px; height: 18px; border-radius: 50%; background-color: var(--border-color); color: var(--text-color); text-align: center; font-size: 12px; line-height: 18px; margin-left: 8px; cursor: pointer; transition: background-color 0.2s; flex-shrink: 0; }
.info-icon:hover { background-color: var(--primary-accent); }

.form-group select, .form-group input[type="text"], .form-group input[type="number"] { width: 100%; padding: 0.75rem 1rem; background-color: var(--input-bg); border: 1px solid var(--border-color); border-radius: 8px; color: var(--text-color); font-size: 1rem; transition: border-color 0.2s, box-shadow 0.2s; }
.form-group select option { background-color: #0c0f1a; color: #e0e5f0; }
.form-group select:focus, .form-group input:focus { outline: none; border-color: var(--primary-accent); box-shadow: 0 0 0 3px var(--shadow-color); }
.input-error { border-color: var(--error-color) !important; box-shadow: 0 0 0 2px rgba(220, 53, 69, 0.25); }

.wizard-nav { margin-top: auto; padding-top: 1.5rem; display: flex; justify-content: space-between; flex-shrink: 0; border-top: 1px solid var(--border-color); }

/* --- Calculator Table Styles --- */
.xls-table { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 15px; align-items: start; background: rgba(0,0,0,0.2); padding: 1rem; border-radius: 8px; margin-bottom: 1rem; }
.xls-header { font-family: var(--font-title); color: var(--text-muted); font-size: 0.9rem; text-align: center; border-bottom: 1px solid var(--border-color); padding-bottom: 0.5rem; margin-bottom: 0.5rem; }
.xls-label { font-weight: bold; font-size: 0.9rem; margin-top: 10px; }
.xls-cell { display: flex; flex-direction: column; gap: 5px; }
.mode-selector { display: flex; gap: 4px; justify-content: center; margin-bottom: 4px; }
.mode-btn { border: 1px solid var(--border-color); background: var(--input-bg); color: var(--text-muted); font-size: 0.7rem; padding: 2px 6px; cursor: pointer; border-radius: 4px; opacity: 0.7; transition: all 0.2s; }
.mode-btn.active { background: var(--primary-accent); color: #fff; border-color: var(--primary-accent); opacity: 1; font-weight: bold; }
.mode-btn:hover { opacity: 1; border-color: var(--text-color); }
.xls-input { background: var(--xls-bg-orange); border: 1px solid var(--xls-border-orange); color: var(--text-color); padding: 0.5rem; border-radius: 4px; width: 100%; text-align: center; font-size: 0.9rem; }
.xls-input:focus { outline: none; box-shadow: 0 0 5px var(--xls-border-orange); }
.xls-input option { background-color: #0c0f1a; color: #e0e5f0; } 
.locked-input { background-color: #151823; color: #8a99b5; border-color: #343a5e; pointer-events: none; opacity: 0.9; }
.btn-glow { box-shadow: 0 0 10px var(--success-color); border-color: var(--success-color); color: var(--success-color); animation: pulse-green 2s infinite; font-weight: bold; }
@keyframes pulse-green { 0% { box-shadow: 0 0 0 0 rgba(40, 167, 69, 0.4); } 70% { box-shadow: 0 0 0 8px rgba(40, 167, 69, 0); } 100% { box-shadow: 0 0 0 0 rgba(40, 167, 69, 0); } }
.xls-result { background: var(--xls-bg-green); border: 1px solid var(--xls-border-green); color: var(--text-color); padding: 0.5rem; border-radius: 4px; width: 100%; text-align: center; font-weight: bold; }
.xls-readout { text-align: center; font-size: 0.9rem; color: var(--text-muted); }
.xls-warning { color: var(--xls-text-red); font-size: 0.8rem; display: block; text-align: center; margin-top: 2px; }
.xls-section-title { grid-column: 1 / -1; font-family: var(--font-title); color: var(--secondary-accent); margin-top: 1rem; padding-bottom: 0.5rem; border-bottom: 1px solid var(--border-color); }
.xls-calc-btn { background: none; border: 1px solid var(--border-color); color: var(--text-muted); cursor: pointer; padding: 4px 8px; font-size: 0.8rem; border-radius: 4px; margin-top: 4px; width: 100%; transition: all 0.2s; }
.xls-calc-btn:hover { background: var(--input-bg); color: var(--text-color); }
.info-box { grid-column: 1 / -1; margin-top: 1.5rem; padding: 1rem; background: rgba(0,0,0,0.3); border-radius: 8px; font-size: 0.85rem; color: #bbb; border-left: 3px solid var(--primary-accent); text-align: left; }
.info-box strong { color: var(--text-color); }
.info-box ul { margin: 0.5rem 0 0 1.2rem; padding: 0; }

#config-preview { width: 100%; height: 300px; background-color: var(--input-bg); border: 1px solid var(--border-color); border-radius: 8px; color: var(--text-muted); font-family: 'Courier New', Courier, monospace; font-size: 0.8rem; padding: 1rem; resize: vertical; }
.axis-section h3 { font-size: 1.2rem; color: var(--secondary-accent); border-bottom: 1px solid var(--border-color); padding-bottom: 0.5rem; margin-top: 2rem; }
.axis-section:first-child h3 { margin-top: 0; }

/* --- Wiki Section --- */
#wiki-section { text-align: left; display: flex; flex-direction: column; flex: 1; min-height: 0; padding: 2rem; overflow: hidden; }
#wiki-content { display: flex; gap: 2rem; margin-top: 1rem; flex: 1; overflow: hidden; min-height: 0; }
#wiki-nav { flex: 0 0 200px; overflow-y: auto; }
#wiki-nav ul { list-style: none; padding: 0; margin: 0; }
#wiki-nav a { display: block; padding: 0.5rem 1rem; color: var(--text-muted); text-decoration: none; border-radius: 6px; transition: background-color 0.2s, color 0.2s; }
#wiki-nav a:hover { background-color: var(--input-bg); color: var(--text-color); }
#wiki-nav a.active { background-color: var(--primary-accent); color: var(--bg-color); font-weight: bold; }
#wiki-article { flex-grow: 1; overflow-y: auto; padding-right: 1rem; }
#wiki-article h2 { text-align: left; }
#wiki-article p, #wiki-article ul, #wiki-article li { font-size: 1rem; color: var(--text-muted); max-width: 100%; }
#wiki-article a { color: var(--primary-accent); }
#wiki-article code { background-color: var(--input-bg); padding: 0.1rem 0.3rem; border-radius: 4px; font-family: 'Courier New', Courier, monospace; color: var(--secondary-accent); }

/* --- Modal Styles --- */
.modal { position: fixed; z-index: 1000; left: 0; top: 0; width: 100%; height: 100%; overflow: auto; background-color: rgba(12, 15, 26, 0.8); display: flex; justify-content: center; align-items: center; opacity: 0; transition: opacity 0.3s ease; pointer-events: none; }
.modal.visible { opacity: 1; pointer-events: auto; }
.modal-content { background-color: var(--container-bg); margin: auto; padding: 2rem; border: 1px solid var(--border-color); border-radius: var(--border-radius); max-width: 700px; width: 90%; box-shadow: 0 8px 32px 0 var(--shadow-color); transform: scale(0.95); transition: transform 0.3s ease; }
.modal.visible .modal-content { transform: scale(1); }
.modal-header { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--border-color); padding-bottom: 1rem; margin-bottom: 1rem; }
.modal-header h3 { margin: 0; }
.modal-close { color: var(--text-muted); font-size: 28px; font-weight: bold; cursor: pointer; }
.modal-close:hover { color: var(--text-color); }
.modal-body p { font-size: 1rem; text-align: left; margin-bottom: 0; max-width: 100%; color: var(--text-muted); }
.modal-body code { background-color: var(--input-bg); padding: 0.1rem 0.3rem; border-radius: 4px; font-family: 'Courier New', Courier, monospace; color: var(--secondary-accent); }
.modal-body strong { color: var(--text-color); }

/* --- Footer --- */
footer { width: 100%; max-width: 900px; padding-top: 1.5rem; text-align: center; font-size: 0.9rem; color: var(--text-muted); padding-bottom: 1rem; }