/* 登录页面样式 */
body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 20px;
    font-family: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

.login-container {
    width: 100%;
    max-width: 420px;
    text-align: center;
}

.login-logo {
    margin-bottom: 30px;
}

.login-logo img {
    height: 80px;
    margin-bottom: 15px;
    filter: drop-shadow(0 6px 12px rgba(0,0,0,0.15));
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.login-logo h1 {
    font-size: 28px;
    color: white;
    text-shadow: 0 3px 6px rgba(0,0,0,0.3);
    font-weight: 300;
    margin: 0;
    letter-spacing: 1px;
}

.login-container .card {
    border: none;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    backdrop-filter: blur(15px);
    background: rgba(255,255,255,0.95);
    overflow: hidden;
}

.login-container .card-body {
    padding: 40px 35px;
}

.login-box-msg {
    text-align: center;
    font-size: 18px;
    color: #333;
    margin-bottom: 30px;
    font-weight: 400;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.login-box-msg .icon {
    color: #667eea;
    font-size: 20px;
}

.login-container .form-control {
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 12px 15px 12px 45px;
    font-size: 15px;
    transition: all 0.3s ease;
    background: #f8f9fa;
    height: auto;
}

.login-container .form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.3rem rgba(102, 126, 234, 0.25);
    background: white;
}

.login-container .form-group {
    position: relative;
    margin-bottom: 20px;
}

.login-container .form-group .input-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #667eea;
    font-size: 16px;
    z-index: 10;
    pointer-events: none;
}

.login-container .btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 12px;
    padding: 12px;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
    margin-top: 10px;
    width: 100%;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.login-container .btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.login-container .btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.login-container .btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.login-container .alert-danger {
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a52 100%);
    color: white;
    margin-bottom: 20px;
    padding: 12px 15px;
    font-size: 14px;
    display: none;
}

.login-footer {
    text-align: center;
    margin-top: 25px;
    color: rgba(255,255,255,0.9);
    font-size: 13px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.login-footer .icon {
    font-size: 14px;
}

.login-container .form-control::placeholder {
    color: #adb5bd;
    font-weight: 400;
}

.login-container .loading {
    display: none;
}