:root {
    --bg-gradient: linear-gradient(135deg, #fbc2eb 0%, #a6c1ee 100%);
    --panel-bg: rgba(255, 255, 255, 0.85);
    --text-color: #3e3e3e;
    --accent-color: #a6c1ee;
    --shadow: 0 10px 30px rgba(0,0,0,0.05);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
    background: var(--bg-gradient);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.crypto-container {
    background: var(--panel-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 40px 30px;
    border-radius: 24px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.06);
    border: 1px solid rgba(255,255,255,0.4);
    text-align: center;
}

h2 { color: var(--text-color); margin-bottom: 5px; font-weight: 700; }
.subtitle { color: #888; font-size: 0.9rem; margin-bottom: 25px; }

/* Display Box */
.result-box {
    display: flex;
    background: white;
    padding: 12px 18px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 25px;
    align-items: center;
    border: 1px solid rgba(0,0,0,0.02);
}

.result-box input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    letter-spacing: 1px;
    background: transparent;
}

.icon-btn {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    transition: transform 0.2s;
    padding-left: 10px;
}
.icon-btn:hover { transform: scale(1.15); }

/* Settings Panel Layout */
.settings-panel {
    text-align: left;
    margin-bottom: 30px;
}

.setting-row {
    margin-bottom: 20px;
}

.setting-row label {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 8px;
    color: var(--text-color);
}

.setting-row input[type="range"] {
    width: 100%;
    accent-color: #fbc2eb;
    cursor: pointer;
}

.checkbox-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.check-container {
    font-size: 0.9rem;
    color: #555;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    user-select: none;
}

/* Action Button */
.action-btn {
    width: 100%;
    padding: 14px;
    border: none;
    background: linear-gradient(135deg, #fbc2eb 0%, #a6c1ee 100%);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    box-shadow: 0 8px 20px rgba(251, 194, 235, 0.4);
    transition: transform 0.2s, box-shadow 0.2s;
}
.action-btn:hover { 
    transform: translateY(-2px); 
    box-shadow: 0 10px 22px rgba(251, 194, 235, 0.5);
}
.action-btn:active { transform: scale(0.98); }