:root {
    --primary: #8b3dff;
    --border: #e6e6e6;
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background: #f4f7f9;
}

.app-layout { display: flex; height: 100vh; }

.sidebar {
    width: 360px;
    background: white;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.sidebar-header { padding: 25px; display: flex; align-items: center; gap: 15px; border-bottom: 1px solid #f0f0f0; }
.app-logo { width: 40px; border-radius: 50%; }

.sidebar-scroll { flex: 1; overflow-y: auto; padding: 25px; }

/* Large Wise URL Block */
.wise-input-group { margin-bottom: 30px; }
.wise-input-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 12px; color: #333; }

.big-input {
    width: 100%;
    padding: 16px;
    font-size: 16px;
    border: 2px solid var(--border);
    border-radius: 12px;
    box-sizing: border-box;
    transition: border-color 0.3s;
}
.big-input:focus { border-color: var(--primary); outline: none; }

/* Hue Scroller Styling */
.scroller-wrapper { display: flex; align-items: center; gap: 15px; }
.color-preview { width: 35px; height: 35px; border-radius: 50%; border: 2px solid #fff; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }

.hue-slider {
    flex: 1;
    -webkit-appearance: none;
    height: 12px;
    border-radius: 6px;
    background: linear-gradient(to right, #ff0000 0%, #ffff00 17%, #00ff00 33%, #00ffff 50%, #0000ff 67%, #ff00ff 83%, #ff0000 100%);
    cursor: pointer;
}
.hue-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: white;
    border: 3px solid #333;
    border-radius: 50%;
    cursor: pointer;
}

/* UI Elements */
.shape-picker { display: flex; gap: 12px; }
.shape-btn { flex: 1; padding: 12px; border: 1px solid var(--border); background: white; border-radius: 8px; cursor: pointer; }
.shape-btn.active { background: #f0e6ff; border-color: var(--primary); color: var(--primary); font-weight: bold; }

.main-action-btn {
    width: 100%;
    padding: 18px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    margin-top: 20px;
}

.preview-area { flex: 1; display: flex; align-items: center; justify-content: center; }
.qr-container { background: white; padding: 50px; border-radius: 20px; box-shadow: 0 25px 50px -12px rgba(0,0,0,0.1); }