:root {
    --bg: #0d1117;
    --card: #161b22;
    --accent: #ffc300;
    --border: #30363d;
    --text: #e6edf3;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
}

.main-content-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    text-align: center;
}

.tool-title { color: var(--accent); font-size: 2rem; font-weight: bold; margin-bottom: 5px; }
.tool-subtitle { color: #8b949e; margin-bottom: 25px; font-size: 1rem; }

.main-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 20px;
}

@media (max-width: 900px) { .main-grid { grid-template-columns: 1fr; } }

.panel-tool {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

.canvas-container {
    position: relative;
    background: #000;
    border-radius: 8px;
    overflow: hidden;
    cursor: crosshair;
    min-height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #444;
}

canvas#mainCanvas { max-width: 100%; height: auto; }

.controls-row {
    margin-top: 20px;
    display: flex;
    gap: 10px;
    justify-content: center;
}

input[type="file"] { display: none; }

.btn-spicule {
    background: var(--border);
    color: white;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    transition: 0.3s;
    border: 1px solid transparent;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}
.btn-spicule:hover { background: #444; border-color: var(--accent); }

#info-box {
    margin-top: 15px;
    font-size: 0.9em;
    color: var(--accent);
    font-weight: 500;
    height: 20px;
}

.chart-wrapper {
    height: 300px;
    width: 100%;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
    padding: 10px;
}

.interpretation {
    margin-top: 20px;
    text-align: left;
    font-size: 0.85em;
    color: #8b949e;
    line-height: 1.5;
    padding: 15px;
    background: rgba(255, 195, 0, 0.05);
    border-left: 3px solid var(--accent);
    border-radius: 4px;
}

footer {
    margin-top: 50px;
    padding: 20px;
    border-top: 1px solid var(--border);
    color: #8b949e;
    font-size: 0.9rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
}