body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}
.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}
.register-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    margin: 28px 0;
}
/* 大光球畫布 */
#orb-canvas {
    position: fixed;
    inset: 0;
    z-index: 10;
    width: 100vw;
    height: 100vh;
    display: block;
    pointer-events: none;
}
/* 動態文字樣式 */
.orb-text {
    position: fixed;
    z-index: 11;
    pointer-events: none;
    color: rgba(255, 255, 255, 0.9);
    font-size: 18px;
    font-weight: 500;
    text-shadow: 0 0 20px rgba(102, 126, 234, 0.8);
    white-space: nowrap;
    opacity: 0;
    transition: opacity 1s ease;
    font-family: 'Microsoft JhengHei', 'PingFang TC', 'Helvetica Neue', Arial, sans-serif;
}
.orb-text.show {
    opacity: 1;
    transition: opacity 0.3s ease;
}
/* 全螢幕 Canvas 背景層 */
#neural-bg {
    position: fixed;
    inset: 0;
    z-index: -2;
    width: 100vw;
    height: 100vh;
    display: block;
    background: radial-gradient(1200px 800px at 20% 10%, rgba(118,75,162,0.18), transparent 60%),
                radial-gradient(900px 600px at 80% 20%, rgba(102,126,234,0.14), transparent 60%),
                radial-gradient(700px 500px at 50% 80%, rgba(72,187,120,0.10), transparent 60%),
                #0b1020;
}
.login-header, .register-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 20px 20px 0 0;
    padding: 2rem;
    text-align: center;
}
.btn-login, .btn-register {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 10px;
    padding: 12px 30px;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
}
.btn-login:hover, .btn-register:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}
.btn-quick-login {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    border: none;
    border-radius: 10px;
    padding: 12px 30px;
    font-weight: 600;
    transition: all 0.3s ease;
}
.btn-quick-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(40, 167, 69, 0.3);
}
.btn-outline-secondary {
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 30px;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s ease;
}
.btn-outline-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}
.form-control {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    padding: 12px 15px;
    transition: all 0.3s ease;
}
.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}
.subscription-card {
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 1rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
}
.subscription-card:hover {
    border-color: #667eea;
    background-color: #f8f9ff;
}
.subscription-card.selected {
    border-color: #667eea;
    background-color: #f8f9ff;
}
/* Helper classes for inline styles replacement */
.mw-200 {
    max-width: 200px !important;
}